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class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Soil_amendments"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.4</span> <span>Soil amendments</span> </div> </a> <ul id="toc-Soil_amendments-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Pollution" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Pollution"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5</span> <span>Pollution</span> </div> </a> <ul id="toc-Pollution-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Agriculture_management_practices" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Agriculture_management_practices"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.6</span> <span>Agriculture management practices</span> </div> </a> <ul id="toc-Agriculture_management_practices-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Effects" 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href="https://cs.wikipedia.org/wiki/Acidifikace" title="Acidifikace – Czech" lang="cs" hreflang="cs" data-title="Acidifikace" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Bodenversauerung" title="Bodenversauerung – German" lang="de" hreflang="de" data-title="Bodenversauerung" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Acidificaci%C3%B3n_del_suelo" title="Acidificación del suelo – Spanish" lang="es" hreflang="es" data-title="Acidificación del suelo" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A7%D8%B3%DB%8C%D8%AF%DB%8C_%D8%B4%D8%AF%D9%86_%D8%AE%D8%A7%DA%A9" title="اسیدی شدن خاک – Persian" lang="fa" hreflang="fa" data-title="اسیدی شدن خاک" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Acidification_des_sols" title="Acidification des sols – French" lang="fr" hreflang="fr" data-title="Acidification des sols" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%86%A0%EC%96%91%EC%82%B0%ED%99%94" title="토양산화 – Korean" lang="ko" hreflang="ko" data-title="토양산화" data-language-autonym="한국어" data-language-local-name="Korean" 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class="mw-redirect" title="Cation">cations</a>, which reduces the <a href="/wiki/Soil_pH" title="Soil pH">soil pH</a>. Chemically, this happens when a <a href="/wiki/Proton" title="Proton">proton</a> donor gets added to the soil. The donor can be an <a href="/wiki/Acid" title="Acid">acid</a>, such as <a href="/wiki/Nitric_acid" title="Nitric acid">nitric acid</a>, <a href="/wiki/Sulfuric_acid" title="Sulfuric acid">sulfuric acid</a>, or <a href="/wiki/Carbonic_acid" title="Carbonic acid">carbonic acid</a>. It can also be a compound such as <a href="/wiki/Aluminium_sulfate" title="Aluminium sulfate">aluminium sulfate</a>, which reacts in the soil to release protons. Acidification also occurs when <a href="/wiki/Base_(chemistry)" title="Base (chemistry)">base</a> cations such as <a href="/wiki/Calcium" title="Calcium">calcium</a>, <a href="/wiki/Magnesium" title="Magnesium">magnesium</a>, <a href="/wiki/Potassium" title="Potassium">potassium</a> and <a href="/wiki/Sodium" title="Sodium">sodium</a> are leached from the soil. </p><p>Soil acidification naturally occurs as <a href="/wiki/Lichen" title="Lichen">lichens</a> and <a href="/wiki/Algae" title="Algae">algae</a> begin to break down rock surfaces. Acids continue with this dissolution as soil develops. With time and weathering, soils become more acidic in natural ecosystems. Soil acidification rates can vary, and increase with certain factors such as <a href="/wiki/Acid_rain" title="Acid rain">acid rain</a>, agriculture, and pollution.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Causes">Causes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Soil_acidification&action=edit&section=1" title="Edit section: Causes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Acid_rain">Acid rain</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Soil_acidification&action=edit&section=2" title="Edit section: Acid rain"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Rainfall is naturally <a href="/wiki/Acid_rain" title="Acid rain">acidic</a> due to carbonic acid forming from carbon dioxide in the atmosphere <sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (October 2024)">citation needed</span></a></i>]</sup>. This compound causes rainfall pH to be around 5.0–5.5. When rainfall has a lower pH than natural levels, it can cause rapid acidification of soil. <a href="/wiki/Sulfur_dioxide" title="Sulfur dioxide">Sulfur dioxide</a> and <a href="/wiki/NOx" title="NOx">nitrogen oxides</a> are precursors of stronger acids that can lead to <a href="/wiki/Acid_rain" title="Acid rain">acid rain</a> production when they react with water in the atmosphere. These gases may be present in the atmosphere due to natural sources such as lightning and volcanic eruptions, or from <a href="/wiki/Human_impact_on_the_environment" title="Human impact on the environment">anthropogenic</a> emissions.<sup id="cite_ref-:1_2-0" class="reference"><a href="#cite_note-:1-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Basic cations like calcium are leached from the soil as acidic rainfall flows, which allows aluminum and proton levels to increase.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:3_4-0" class="reference"><a href="#cite_note-:3-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>Nitric and sulfuric acids in acid rain and snow can have different effects on the acidification of forest soils, particularly seasonally in regions where a snow pack may accumulate during the winter.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Snow tends to contain more nitric acid than sulfuric acid, and as a result, a pulse of nitric acid-rich snow meltwater may leach through high elevation forest soils during a short time in the spring.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> This volume of water may comprise as much as 50% of the annual precipitation. The nitric acid flush of meltwater may cause a sharp, short term, decrease in the drainage water pH entering groundwater and surface waters.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> The decrease in pH can solubilize Al<sup>3+</sup> that is toxic to fish,<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> especially newly-hatched fry with immature gill systems through which they pass large volumes of water to obtain O<sub>2</sub> for respiration. As the snow meltwater flush passes, water temperatures rise, and lakes and streams produce more dissolved organic matter; the Al concentration in drainage water decreases and is bound to organic acids, making it less toxic to fish. In rain, the ratio of nitric-to-sulfuric acids decreases to approximately 1:2. The higher sulfuric acid content of rain also may not release as much Al<sup>3+</sup> from soils as does nitric acid, in part due to the retention (adsorption) of SO<sub>4</sub><sup>2-</sup> by soils. This process releases OH<sup>−</sup> into soil solution and buffers the pH decrease caused by the added H<sup>+</sup> from both acids. The forest floor organic soil horizons (layers) that are high in organic matter also buffer pH, and decrease the load of H+ that subsequently leaches through underlying mineral horizons.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Biological_weathering">Biological weathering</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Soil_acidification&action=edit&section=3" title="Edit section: Biological weathering"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Weathering#Biological_weathering" title="Weathering">Weathering § Biological weathering</a></div> <p>Plant roots acidify soil by releasing protons and organic acids so as to chemically weather soil minerals.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Bacterial_decay" class="mw-redirect" title="Bacterial decay">Decaying</a> remains of dead plants on soil may also form organic acids which contribute to soil acidification.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> Acidification from leaf litter on the O-horizon is more pronounced under <a href="/wiki/Coniferous_trees" class="mw-redirect" title="Coniferous trees">coniferous trees</a> such as <a href="/wiki/Pine" title="Pine">pine</a>, <a href="/wiki/Spruce" title="Spruce">spruce</a> and <a href="/wiki/Fir" title="Fir">fir</a>, which return fewer base cations to the soil, rather than under <a href="/wiki/Deciduous_trees" class="mw-redirect" title="Deciduous trees">deciduous trees</a>; however, soil pH differences attributed to vegetation often preexisted that vegetation, and help select for species which tolerate them. Calcium accumulation in existing biomass also strongly affects soil pH - a factor which can vary from species to species.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Parent_materials">Parent materials</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Soil_acidification&action=edit&section=4" title="Edit section: Parent materials"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Certain parent materials also contribute to soil acidification. <a href="/wiki/Granite" title="Granite">Granites</a> and their allied <a href="/wiki/Igneous" class="mw-redirect" title="Igneous">igneous</a> <a href="/wiki/Rock_(geology)" title="Rock (geology)">rocks</a> are called "acidic" because they have a lot of free <a href="/wiki/Quartz" title="Quartz">quartz</a>, which produces <a href="/wiki/Silicic_acid" title="Silicic acid">silicic acid</a> on weathering.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> Also, they have relatively low amounts of calcium and magnesium. Some <a href="/wiki/Sedimentary" class="mw-redirect" title="Sedimentary">sedimentary</a> rocks such as <a href="/wiki/Shale" title="Shale">shale</a> and <a href="/wiki/Coal" title="Coal">coal</a> are rich in <a href="/wiki/Sulfide" title="Sulfide">sulfides</a>, which, when hydrated and oxidized, produce sulfuric acid which is much stronger than silicic acid. Many coal soils are too acidic to support vigorous plant growth, and coal gives off strong precursors to acid rain when it is burned. Marine <a href="/wiki/Clay" title="Clay">clays</a> are also sulfide-rich in many cases, and such clays become very acidic if they are drained to an oxidizing state. </p> <div class="mw-heading mw-heading3"><h3 id="Soil_amendments">Soil amendments</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Soil_acidification&action=edit&section=5" title="Edit section: Soil amendments"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Soil_amendment" class="mw-redirect" title="Soil amendment">Soil amendments</a> such as chemical <a href="/wiki/Fertilizer" title="Fertilizer">fertilizers</a> can cause soil acidification. <a href="/wiki/Sulfur" title="Sulfur">Sulfur</a> based fertilizers can be highly acidifying, examples include elemental sulfur and iron sulfate while others like <a href="/wiki/Potassium_sulfate" title="Potassium sulfate">potassium sulfate</a> have no significant effect on <a href="/wiki/Soil_pH" title="Soil pH">soil pH</a>. While most <a href="/wiki/Nitrogen_fertilizers" class="mw-redirect" title="Nitrogen fertilizers">nitrogen fertilizers</a> have an acidifying effect, ammonium-based nitrogen fertilizers are more acidifying than other nitrogen sources.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> Ammonia-based nitrogen fertilizers include <a href="/wiki/Ammonium_sulfate" title="Ammonium sulfate">ammonium sulfate</a>, <a href="/wiki/Diammonium_phosphate" title="Diammonium phosphate">diammonium phosphate</a>, <a href="/wiki/Monoammonium_phosphate" class="mw-redirect" title="Monoammonium phosphate">monoammonium phosphate</a>, and <a href="/wiki/Ammonium_nitrate" title="Ammonium nitrate">ammonium nitrate</a>. Organic nitrogen sources, such as <a href="/wiki/Urea" title="Urea">urea</a> and <a href="/wiki/Compost" title="Compost">compost</a>, are less acidifying. Nitrate sources which have little or no ammonium, such as <a href="/wiki/Calcium_nitrate" title="Calcium nitrate">calcium nitrate</a>, <a href="/wiki/Magnesium_nitrate" title="Magnesium nitrate">magnesium nitrate</a>, <a href="/wiki/Potassium_nitrate" title="Potassium nitrate">potassium nitrate</a>, and <a href="/wiki/Sodium_nitrate" title="Sodium nitrate">sodium nitrate</a>, are not acidifying.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Pollution">Pollution</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Soil_acidification&action=edit&section=6" title="Edit section: Pollution"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Acidification may also occur from nitrogen emissions into the air, as the nitrogen may end up deposited into the soil.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> Animal livestock is responsible for nearly 65 percent of man-made <a href="/wiki/Ammonia" title="Ammonia">ammonia</a> <a href="/wiki/Air_pollution" title="Air pollution">emissions</a>.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p><p>Anthropogenic sources of sulfur dioxides and nitrogen oxides play a major role in increase of acid rain production.<sup class="noprint Inline-Template" style="margin-left:0.1em; white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Please_clarify" title="Wikipedia:Please clarify"><span title="The text near this tag may need clarification or removal of jargon. (August 2020)">clarification needed</span></a></i>]</sup> The use of fossil fuels and motor exhaust are the largest anthropogenic contributors to sulfuric gases and nitrogen oxides, respectively.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> </p><p>Aluminum is one of the few elements capable of making soil more acidic.<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> This is achieved by aluminum taking hydroxide ions out of water, leaving hydrogen ions behind.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> As a result, the soil is more acidic, which makes it unlivable for many plants. Another consequence of aluminum in soils is aluminum toxicity, which inhibits root growth.<sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Agriculture_management_practices">Agriculture management practices</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Soil_acidification&action=edit&section=7" title="Edit section: Agriculture management practices"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Agriculture managements approaches such as monoculture and chemical fertilization often leads to soil problems such as soil acidification, degradation, and soil-borne diseases, which ultimately have a negative impact on agricultural productivity and sustainability.<sup id="cite_ref-:2_25-0" class="reference"><a href="#cite_note-:2-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:4_26-0" class="reference"><a href="#cite_note-:4-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Effects">Effects</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Soil_acidification&action=edit&section=8" title="Edit section: Effects"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Soil_biodiversity#Acidification" title="Soil biodiversity">Soil biodiversity § Acidification</a></div> <p>Soil acidification can cause damage to plants and organisms in the soil. In plants, soil acidification results in smaller, less durable roots.<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> Acidic soils sometimes damage the root tips reducing further growth.<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> Plant height is impaired and seed <a href="/wiki/Germination" title="Germination">germination</a> also decreases. Soil acidification impacts plant health, resulting in reduced cover and lower plant density. Overall, stunted growth is seen in plants.<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> Soil acidification is directly linked to a decline in endangered species of plants.<sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> </p><p>In the soil, acidification reduces <a href="/wiki/Microorganism" title="Microorganism">microbial</a> and <a href="/wiki/Fauna" title="Fauna">macrofaunal</a> diversity.<sup id="cite_ref-:0_31-0" class="reference"><a href="#cite_note-:0-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> This can reduce soil structure decline which makes it more sensitive to erosion. There are less nutrients available in the soil, larger impact of toxic elements to plants, and consequences to soil biological functions (such as <a href="/wiki/Nitrogen_fixation" title="Nitrogen fixation">nitrogen fixation</a>).<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> A recent study showed that sugarcane monoculture induces soil acidity, reduces soil fertility, shifts microbial structure, and reduces its activity. Furthermore, most beneficial bacterial genera decreased significantly due to sugarcane monoculture, while beneficial fungal genera showed a reverse trend.<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup> Therefore, mitigating soil acidity, improving soil fertility, and soil enzymatic activities, including improved microbial structure with beneficial service to plants and soil, can be an effective measure to develop a sustainable sugarcane cropping system.<sup id="cite_ref-:2_25-1" class="reference"><a href="#cite_note-:2-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> </p><p>At a larger scale, soil acidification is linked to losses in agricultural productivity due to these effects.<sup id="cite_ref-:0_31-1" class="reference"><a href="#cite_note-:0-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> </p><p>Impacts of acidic water and Soil acidification on plants could be minor or in most cases major. In minor cases which do not result in fatality of plant life include; less-sensitive plants to acidic conditions and or less potent acid rain. Also in minor cases the plant will eventually die due to the acidic water lowering the plants natural pH. Acidic water enters the plant and causes important plant minerals to dissolve and get carried away; which ultimately causes the plant to die of lack of minerals for nutrition.<sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> In major cases which are more extreme; the same process of damage occurs as in minor cases, which is removal of essential minerals, but at a much quicker rate. Likewise, acid rain that falls on soil and on plant leaves causes drying of the waxy leaf cuticle; which ultimately causes rapid water loss from the plant to the outside atmosphere and results in death of the plant. To see if a plant is being affected by soil acidification, one can closely observe the plant leaves. If the leaves are green and look healthy, the soil pH is normal and acceptable for plant life. But if the plant leaves have yellowing between the veins on their leaves, that means the plant is suffering from acidification and is unhealthy. Moreover, a plant suffering from soil acidification cannot photosynthesize.<sup id="cite_ref-35" class="reference"><a href="#cite_note-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> Drying out of the plant due to acidic water destroy chloroplast organelles. Without being able to photosynthesize a plant cannot create nutrients for its own survival or oxygen for the survival of aerobic organisms; which affects most species of Earth and ultimately end the purpose of the plants existence.<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Prevention_and_management">Prevention and management</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Soil_acidification&action=edit&section=9" title="Edit section: Prevention and management"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Soil acidification is a common issue in long-term crop production which can be reduced by lime, organic amendments (e.g., straw and manure) and <a href="/wiki/Biochar" title="Biochar">biochar</a> application.<sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:2_25-2" class="reference"><a href="#cite_note-:2-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-38" class="reference"><a href="#cite_note-38"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-40" class="reference"><a href="#cite_note-40"><span class="cite-bracket">[</span>40<span class="cite-bracket">]</span></a></sup> In sugarcane, soybean and <a href="/wiki/Maize" title="Maize">corn</a> crops grown in acidic soils, lime application resulted in nutrient restoration, increase in soil pH, increase in root biomass, and better plant health.<sup id="cite_ref-:4_26-1" class="reference"><a href="#cite_note-:4-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-41" class="reference"><a href="#cite_note-41"><span class="cite-bracket">[</span>41<span class="cite-bracket">]</span></a></sup> </p><p>Different management strategies may also be applied to prevent further acidification: using less acidifying fertilizers, considering fertilizer amount and application timing to reduce nitrate-nitrogen leaching, good <a href="/wiki/Irrigation" title="Irrigation">irrigation</a> management with acid-neutralizing water, and considering the ratio of basic nutrients to nitrogen in harvested crops. Sulfur fertilizers should only be used in responsive crops with a high rate of crop recovery.<sup id="cite_ref-42" class="reference"><a href="#cite_note-42"><span class="cite-bracket">[</span>42<span class="cite-bracket">]</span></a></sup> </p><p>By reducing anthropogenic sources of sulfur dioxides and nitrogen oxides, and with air-pollution control measures, let us<sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Manual_of_Style/Words_to_watch#Unsupported_attributions" title="Wikipedia:Manual of Style/Words to watch"><span title="The material near this tag possibly uses too-vague attribution or weasel words. (December 2020)">who?</span></a></i>]</sup> try to reduce acid rain and soil acidification worldwide.<sup id="cite_ref-43" class="reference"><a href="#cite_note-43"><span class="cite-bracket">[</span>43<span class="cite-bracket">]</span></a></sup> </p><p>This has been observed in Ontario, Canada, over several lakes and demonstrated improvements in water pH and alkalinity.<sup id="cite_ref-44" class="reference"><a href="#cite_note-44"><span class="cite-bracket">[</span>44<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Soil_acidification&action=edit&section=10" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Acid_sulfate_soil" title="Acid sulfate soil">Acid sulfate soil</a></li> <li><a href="/wiki/Alkali_soil" title="Alkali soil">Alkali soil</a></li> <li><a href="/wiki/Freshwater_acidification" title="Freshwater acidification">Freshwater acidification</a></li> <li><a href="/wiki/Ocean_acidification" title="Ocean acidification">Ocean acidification</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Soil_acidification&action=edit&section=11" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFHelyarPorter1989" class="citation book cs1">Helyar, K. 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E.; Huntington, T. G.; McLaughlin, S. B.; Eagar, C.; Gomez, A.; Cook, R. B. (2006). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20111020163225/http://www.fs.fed.us/ne/newtown_square/publications/other_publishers/OCR/ne_2006_fenn001.pdf">"Status of soil acidification in North America"</a> <span class="cs1-format">(PDF)</span>. <i>Journal of Forest Science</i>. 52: 3–13. Archived from <a rel="nofollow" class="external text" href="http://www.fs.fed.us/ne/newtown_square/publications/other_publishers/OCR/ne_2006_fenn001.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 2011-10-20<span class="reference-accessdate">. Retrieved <span class="nowrap">2019-01-13</span></span>. <q>Ca depletion is a primary mechanism of acid deposition effects in eastern North America</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Journal+of+Forest+Science&rft.atitle=Status+of+soil+acidification+in+North+America&rft.pages=3-13&rft.date=2006&rft.aulast=Fenn&rft.aufirst=M.+E.&rft.au=Huntington%2C+T.+G.&rft.au=McLaughlin%2C+S.+B.&rft.au=Eagar%2C+C.&rft.au=Gomez%2C+A.&rft.au=Cook%2C+R.+B.&rft_id=http%3A%2F%2Fwww.fs.fed.us%2Fne%2Fnewtown_square%2Fpublications%2Fother_publishers%2FOCR%2Fne_2006_fenn001.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASoil+acidification" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/soil-acidification">"Soil Acidification"</a>. <i>ScienceDirect</i>. 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plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Soil_science_topics" title="Template:Soil science topics"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Soil_science_topics" title="Template talk:Soil science topics"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Soil_science_topics" title="Special:EditPage/Template:Soil science topics"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Soil_science" style="font-size:114%;margin:0 4em"><a href="/wiki/Soil_science" title="Soil science">Soil science</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="3"><div> <ul><li><a href="/wiki/History_of_soil_science" title="History of soil science">History</a></li> <li><a href="/wiki/Index_of_soil-related_articles" title="Index of soil-related articles">Index</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Main fields</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Pedology" title="Pedology">Pedology</a></li> <li><a href="/wiki/Edaphology" title="Edaphology">Edaphology</a></li> <li><a href="/wiki/Soil_biology" title="Soil biology">Soil biology</a></li> <li><a href="/wiki/Soil_microbiology" title="Soil microbiology">Soil microbiology</a></li> <li><a href="/wiki/Soil_zoology" title="Soil zoology">Soil zoology</a></li> <li><a href="/wiki/Soil_ecology" title="Soil ecology">Soil ecology</a></li> <li><a href="/wiki/Soil_physics" title="Soil physics">Soil physics</a></li> <li><a href="/wiki/Soil_mechanics" title="Soil mechanics">Soil mechanics</a></li> <li><a href="/wiki/Soil_chemistry" title="Soil chemistry">Soil chemistry</a></li> <li><a href="/wiki/Environmental_soil_science" title="Environmental soil science">Environmental soil science</a></li> <li><a href="/wiki/Agricultural_soil_science" title="Agricultural soil science">Agricultural soil science</a></li></ul> </div></td><td class="noviewer navbox-image" rowspan="8" style="width:1px;padding:0 0 0 2px"><div><span class="mw-image-border" typeof="mw:File"><a href="/wiki/File:Soil_profile.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Soil_profile.svg/110px-Soil_profile.svg.png" decoding="async" width="110" height="159" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Soil_profile.svg/165px-Soil_profile.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Soil_profile.svg/220px-Soil_profile.svg.png 2x" data-file-width="456" data-file-height="660" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Soil topics</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Soil" title="Soil">Soil</a></li> <li><a href="/wiki/Pedosphere" title="Pedosphere">Pedosphere</a> <ul><li><a href="/wiki/Soil_morphology" title="Soil morphology">Soil morphology</a></li> <li><a href="/wiki/Pedodiversity" title="Pedodiversity">Pedodiversity</a></li> <li><a href="/wiki/Soil_formation" title="Soil formation">Soil formation</a></li></ul></li> <li><a href="/wiki/Soil_erosion" title="Soil erosion">Soil erosion</a></li> <li><a href="/wiki/Soil_contamination" title="Soil contamination">Soil contamination</a></li> <li><a href="/wiki/Soil_retrogression_and_degradation" title="Soil retrogression and degradation">Soil retrogression and degradation</a></li> <li><a href="/wiki/Soil_compaction" title="Soil compaction">Soil compaction</a> <ul><li><a href="/wiki/Soil_compaction_(agriculture)" title="Soil compaction (agriculture)">Soil compaction (agriculture)</a></li></ul></li> <li><a href="/wiki/Soil_sealing" title="Soil sealing">Soil sealing</a></li> <li><a href="/wiki/Soil_salinity" title="Soil salinity">Soil salinity</a> <ul><li><a href="/wiki/Alkali_soil" title="Alkali soil">Alkali soil</a></li></ul></li> <li><a href="/wiki/Soil_pH" title="Soil pH">Soil pH</a> <ul><li><a class="mw-selflink selflink">Soil acidification</a></li></ul></li> <li><a href="/wiki/Soil_health" title="Soil health">Soil health</a></li> <li><a href="/wiki/Soil_life" class="mw-redirect" title="Soil life">Soil life</a></li> <li><a href="/wiki/Soil_biodiversity" title="Soil biodiversity">Soil biodiversity</a></li> <li><a href="/wiki/Soil_quality" title="Soil quality">Soil quality</a></li> <li><a href="/wiki/Soil_value" title="Soil value">Soil value</a></li> <li><a href="/wiki/Soil_fertility" title="Soil fertility">Soil fertility</a></li> <li><a href="/wiki/Soil_resilience" title="Soil resilience">Soil resilience</a></li> <li><a href="/wiki/Soil_color" title="Soil color">Soil color</a></li> <li><a href="/wiki/Soil_texture" title="Soil texture">Soil texture</a></li> <li><a href="/wiki/Soil_structure" title="Soil structure">Soil structure</a> <ul><li><a href="/wiki/Pore_space_in_soil" title="Pore space in soil">Pore space in soil</a></li> <li><a href="/wiki/Pore_water_pressure" title="Pore water pressure">Pore water pressure</a></li></ul></li> <li><a href="/wiki/Soil_crust" title="Soil crust">Soil crust</a></li> <li><a href="/wiki/Soil_horizon" title="Soil horizon">Soil horizon</a></li> <li><a href="/wiki/Soil_biomantle" title="Soil biomantle">Soil biomantle</a></li> <li><a href="/wiki/Soil_carbon" title="Soil carbon">Soil carbon</a></li> <li><a href="/wiki/Soil_gas" title="Soil gas">Soil gas</a> <ul><li><a href="/wiki/Soil_respiration" title="Soil respiration">Soil respiration</a></li></ul></li> <li><a href="/wiki/Soil_organic_matter" title="Soil organic matter">Soil organic matter</a></li> <li><a href="/wiki/Soil_moisture" title="Soil moisture">Soil moisture</a> <ul><li><a href="/wiki/Soil_water_(retention)" title="Soil water (retention)">Soil water (retention)</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Soil_type" title="Soil type">Soil type</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><div class="navbox-styles"></div><div role="navigation" class="navbox" aria-labelledby="Soil_classification" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Soil_type" title="Template:Soil type"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Soil_type" title="Template talk:Soil type"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Soil_type" title="Special:EditPage/Template:Soil type"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Soil_classification" style="font-size:114%;margin:0 4em"><a href="/wiki/Soil_classification" title="Soil classification">Soil classification</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/World_Reference_Base_for_Soil_Resources" title="World Reference Base for Soil Resources">World Reference Base<br /> for Soil Resources</a> (1998–)</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Acrisol" title="Acrisol">Acrisols</a></li> <li><a href="/wiki/Alisols" class="mw-redirect" title="Alisols">Alisols</a></li> <li><a href="/wiki/Andosol" title="Andosol">Andosols</a></li> <li><a href="/wiki/Anthrosol" title="Anthrosol">Anthrosols</a></li> <li><a href="/wiki/Psamment" title="Psamment">Arenosols</a></li> <li><a href="/wiki/Calcisol" title="Calcisol">Calcisols</a></li> <li><a href="/wiki/Cambisol" title="Cambisol">Cambisols</a></li> <li><a href="/wiki/Chernozem" title="Chernozem">Chernozem</a></li> <li><a href="/wiki/Cryosols" class="mw-redirect" title="Cryosols">Cryosols</a></li> <li><a href="/wiki/Durisol" title="Durisol">Durisols</a></li> <li><a href="/wiki/Ferralsols" class="mw-redirect" title="Ferralsols">Ferralsols</a></li> <li><a href="/wiki/Fluvisol" title="Fluvisol">Fluvisols</a></li> <li><a href="/wiki/Gleysol" title="Gleysol">Gleysols</a></li> <li><a href="/wiki/Gypsisols" class="mw-redirect" title="Gypsisols">Gypsisols</a></li> <li><a href="/wiki/Histosol" title="Histosol">Histosol</a></li> <li><a href="/wiki/Kastanozem" title="Kastanozem">Kastanozems</a></li> <li><a href="/wiki/Leptosol" title="Leptosol">Leptosols</a></li> <li><a href="/wiki/Lixisol" title="Lixisol">Lixisols</a></li> <li><a href="/wiki/Luvisol" title="Luvisol">Luvisols</a></li> <li><a href="/wiki/Nitisol" title="Nitisol">Nitisols</a></li> <li><a href="/wiki/Phaeozem" title="Phaeozem">Phaeozems</a></li> <li><a href="/wiki/Planosol" title="Planosol">Planosols</a></li> <li><a href="/wiki/Plinthosol" title="Plinthosol">Plinthosols</a></li> <li><a href="/wiki/Podzol" title="Podzol">Podzols</a></li> <li><a href="/wiki/Regosol" title="Regosol">Regosols</a></li> <li><a href="/wiki/Retisol" title="Retisol">Retisols</a></li> <li><a href="/wiki/Solonchak" title="Solonchak">Solonchaks</a></li> <li><a href="/wiki/Solonetz" title="Solonetz">Solonetz</a></li> <li><a href="/wiki/Stagnosol" title="Stagnosol">Stagnosol</a></li> <li><a href="/wiki/Technosol" title="Technosol">Technosols</a></li> <li><a href="/wiki/Umbrisol" title="Umbrisol">Umbrisols</a></li> <li><a href="/wiki/Vertisol" title="Vertisol">Vertisols</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/USDA_soil_taxonomy" title="USDA soil taxonomy">USDA soil taxonomy</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Alfisol" title="Alfisol">Alfisols</a></li> <li><a href="/wiki/Andisol" title="Andisol">Andisols</a></li> <li><a href="/wiki/Aridisol" title="Aridisol">Aridisols</a></li> <li><a href="/wiki/Entisol" title="Entisol">Entisols</a></li> <li><a href="/wiki/Gelisol" title="Gelisol">Gelisols</a></li> <li><a href="/wiki/Histosol" title="Histosol">Histosols</a></li> <li><a href="/wiki/Inceptisol" title="Inceptisol">Inceptisols</a></li> <li><a href="/wiki/Mollisol" title="Mollisol">Mollisols</a></li> <li><a href="/wiki/Oxisol" title="Oxisol">Oxisols</a></li> <li><a href="/wiki/Podzol" title="Podzol">Spodosols</a></li> <li><a href="/wiki/Ultisol" title="Ultisol">Ultisols</a></li> <li><a href="/wiki/Vertisol" title="Vertisol">Vertisols</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other systems</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/FAO_soil_classification" title="FAO soil classification">FAO soil classification</a> (1974–1998)</li> <li><a href="/wiki/Unified_Soil_Classification_System" title="Unified Soil Classification System">Unified Soil Classification System</a></li> <li><a href="/wiki/AASHTO_Soil_Classification_System" title="AASHTO Soil Classification System">AASHTO Soil Classification System</a></li> <li><a href="/wiki/R%C3%A9f%C3%A9rentiel_p%C3%A9dologique" title="Référentiel pédologique">Référentiel pédologique</a> (French classification system)</li> <li><a href="/wiki/Canadian_system_of_soil_classification" title="Canadian system of soil classification">Canadian system of soil classification</a></li> <li><a href="/wiki/Australian_Soil_Classification" title="Australian Soil Classification">Australian Soil Classification</a></li> <li><a href="/wiki/Polish_Soil_Classification" title="Polish Soil Classification">Polish Soil Classification</a></li> <li><a href="/wiki/1938_USDA_soil_taxonomy" title="1938 USDA soil taxonomy">1938 USDA soil taxonomy</a></li> <li><a href="/wiki/List_of_U.S._state_soils" title="List of U.S. state soils">List of U.S. state soils</a></li> <li><a href="/wiki/List_of_vineyard_soil_types" title="List of vineyard soil types">List of vineyard soil types</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Non-systematic soil types</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sand" title="Sand">Sand</a></li> <li><a href="/wiki/Silt" title="Silt">Silt</a></li> <li><a href="/wiki/Clay" title="Clay">Clay</a></li> <li><a href="/wiki/Loam" title="Loam">Loam</a></li> <li><a href="/wiki/Topsoil" title="Topsoil">Topsoil</a></li> <li><a href="/wiki/Subsoil" title="Subsoil">Subsoil</a></li> <li><a href="/wiki/Soil_crust" title="Soil crust">Soil crust</a></li> <li><a href="/wiki/Claypan" title="Claypan">Claypan</a></li> <li><a href="/wiki/Hardpan" title="Hardpan">Hardpan</a></li> <li><a href="/wiki/Gypcrust" title="Gypcrust">Gypcrust</a></li> <li><a href="/wiki/Caliche" title="Caliche">Caliche</a></li> <li><a href="/wiki/Parent_material" title="Parent material">Parent material</a></li> <li><a href="/wiki/Pedosphere" title="Pedosphere">Pedosphere</a></li> <li><a href="/wiki/Laimosphere" title="Laimosphere">Laimosphere</a></li> <li><a href="/wiki/Rhizosphere" title="Rhizosphere">Rhizosphere</a></li> <li><a href="/wiki/Bulk_soil" title="Bulk soil">Bulk soil</a></li> <li><a href="/wiki/Alkali_soil" title="Alkali soil">Alkali soil</a></li> <li><a href="/wiki/Bay_mud" title="Bay mud">Bay mud</a></li> <li><a href="/wiki/Blue_goo" title="Blue goo">Blue goo</a></li> <li><a href="/wiki/Brickearth" title="Brickearth">Brickearth</a></li> <li><a href="/wiki/Brown_earth" title="Brown earth">Brown earth</a></li> <li><a href="/wiki/Calcareous_grassland" title="Calcareous grassland">Calcareous grassland</a></li> <li><a href="/wiki/Dark_earth" title="Dark earth">Dark earth</a></li> <li><a href="/wiki/Dry_quicksand" title="Dry quicksand">Dry quicksand</a></li> <li><a href="/wiki/Duplex_soil" title="Duplex soil">Duplex soil</a></li> <li><a href="/wiki/Eluvium" title="Eluvium">Eluvium</a></li> <li><a href="/wiki/Expansive_clay" title="Expansive clay">Expansive clay</a></li> <li><a href="/wiki/Fill_dirt" title="Fill dirt">Fill dirt</a></li> <li><a href="/wiki/Fuller%27s_earth" title="Fuller's earth">Fuller's earth</a></li> <li><a href="/wiki/Hydrophobic_soil" title="Hydrophobic soil">Hydrophobic soil</a></li> <li><a href="/wiki/Loess" title="Loess">Loess</a></li> <li><a href="/wiki/Lunar_soil" class="mw-redirect" title="Lunar soil">Lunar soil</a></li> <li><a href="/wiki/Martian_soil" class="mw-redirect" title="Martian soil">Martian soil</a></li> <li><a href="/wiki/Mud" title="Mud">Mud</a></li> <li><a href="/wiki/Muskeg" title="Muskeg">Muskeg</a></li> <li><a href="/wiki/Paleosol" title="Paleosol">Paleosol</a></li> <li><a href="/wiki/Peat" title="Peat">Peat</a></li> <li><a href="/wiki/Prime_farmland" title="Prime farmland">Prime farmland</a></li> <li><a href="/wiki/Quicksand" title="Quicksand">Quicksand</a></li> <li><a href="/wiki/Serpentine_soil" title="Serpentine soil">Serpentine soil</a></li> <li><a href="/wiki/Spodic_soil" class="mw-redirect" title="Spodic soil">Spodic soil</a></li> <li><a href="/wiki/Stagnogley" title="Stagnogley">Stagnogley</a></li> <li><a href="/wiki/Subaqueous_soil" title="Subaqueous soil">Subaqueous soil</a></li> <li><a href="/wiki/Takir_(soil)" title="Takir (soil)">Takir</a></li> <li><a href="/wiki/Terra_preta" title="Terra preta">Terra preta</a></li> <li><a href="/wiki/Terra_rossa_(soil)" title="Terra rossa (soil)">Terra rossa</a></li> <li><a href="/wiki/Tropical_peat" title="Tropical peat">Tropical peat</a></li> <li><a href="/wiki/Yedoma" title="Yedoma">Yedoma</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Category:Types_of_soil" title="Category:Types of soil">Types of soil</a></div></td></tr></tbody></table></div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Applications</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Soil_conservation" title="Soil conservation">Soil conservation</a></li> <li><a href="/wiki/Soil_management" title="Soil management">Soil management</a></li> <li><a href="/wiki/Soil_guideline_value" title="Soil guideline value">Soil guideline value</a></li> <li><a href="/wiki/Soil_survey" title="Soil survey">Soil survey</a></li> <li><a href="/wiki/Soil_test" title="Soil test">Soil test</a></li> <li><a href="/wiki/Soil_governance" title="Soil governance">Soil governance</a></li> <li><a href="/wiki/Soil_value" title="Soil value">Soil value</a></li> <li><a href="/wiki/Soil_salinity_control" title="Soil salinity control">Soil salinity control</a></li> <li><a href="/wiki/Erosion_control" title="Erosion control">Erosion control</a></li> <li><a href="/wiki/Agroecology" title="Agroecology">Agroecology</a></li> <li><a href="/wiki/Liming_(soil)" title="Liming (soil)">Liming (soil)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related fields</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Geology" title="Geology">Geology</a></li> <li><a href="/wiki/Geochemistry" title="Geochemistry">Geochemistry</a></li> <li><a href="/wiki/Petrology" title="Petrology">Petrology</a></li> <li><a href="/wiki/Geomorphology" title="Geomorphology">Geomorphology</a></li> <li><a href="/wiki/Geotechnical_engineering" title="Geotechnical engineering">Geotechnical engineering</a></li> <li><a href="/wiki/Hydrology" title="Hydrology">Hydrology</a></li> <li><a href="/wiki/Hydrogeology" title="Hydrogeology">Hydrogeology</a></li> <li><a href="/wiki/Biogeography" title="Biogeography">Biogeography</a></li> <li><a href="/wiki/Earth_materials" title="Earth materials">Earth materials</a></li> <li><a href="/wiki/Archaeology" title="Archaeology">Archaeology</a></li> <li><a href="/wiki/Agricultural_science" title="Agricultural science">Agricultural science</a> <ul><li><a href="/wiki/Agrology" class="mw-redirect" title="Agrology">Agrology</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Societies, Initiatives</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Australian_Society_of_Soil_Science_Incorporated" title="Australian Society of Soil Science Incorporated">Australian Society of Soil Science Incorporated</a></li> <li><a href="/wiki/Canadian_Society_of_Soil_Science" title="Canadian Society of Soil Science">Canadian Society of Soil Science</a></li> <li><a href="/wiki/Central_Soil_Salinity_Research_Institute" title="Central Soil Salinity Research Institute">Central Soil Salinity Research Institute</a> (India)</li> <li><a href="/wiki/German_Soil_Science_Society" title="German Soil Science Society">German Soil Science Society</a></li> <li><a href="/wiki/Indian_Institute_of_Soil_Science" title="Indian Institute of Soil Science">Indian Institute of Soil Science</a></li> <li><a href="/wiki/International_Union_of_Soil_Sciences" title="International Union of Soil Sciences">International Union of Soil Sciences</a></li> <li><a href="/wiki/International_Year_of_Soil" title="International Year of Soil">International Year of Soil</a></li> <li><a href="/wiki/National_Society_of_Consulting_Soil_Scientists" title="National Society of Consulting Soil Scientists">National Society of Consulting Soil Scientists</a> (US)</li> <li><a href="/wiki/OPAL_Soil_Centre" title="OPAL Soil Centre">OPAL Soil Centre</a> (UK)</li> <li><a href="/wiki/Soil_Science_Society_of_Poland" title="Soil Science Society of Poland">Soil Science Society of Poland</a></li> <li><a href="/wiki/Soil_and_Water_Conservation_Society" title="Soil and Water Conservation Society">Soil and Water Conservation Society</a> (US)</li> <li><a href="/wiki/Soil_Science_Society_of_America" title="Soil Science Society of America">Soil Science Society of America</a></li> <li><a href="/wiki/World_Congress_of_Soil_Science" title="World Congress of Soil Science">World Congress of Soil Science</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Scientific journals</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Acta_Agriculturae_Scandinavica_B" title="Acta Agriculturae Scandinavica B">Acta Agriculturae Scandinavica B</a></i></li> <li><i><a href="/wiki/Journal_of_Soil_and_Water_Conservation" title="Journal of Soil and Water Conservation">Journal of Soil and Water Conservation</a></i></li> <li><i><a href="/wiki/Plant_and_Soil" title="Plant and Soil">Plant and Soil</a></i></li> <li><i><a href="/wiki/Pochvovedenie" title="Pochvovedenie">Pochvovedenie</a></i></li> <li><i><a href="/wiki/Soil_Research" title="Soil Research">Soil Research</a></i></li> <li><i><a href="/wiki/Soil_Science_Society_of_America_Journal" title="Soil Science Society of America Journal">Soil Science Society of America Journal</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">See also</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Land_use" title="Land use">Land use</a></li> <li><a href="/wiki/Land_conversion" class="mw-redirect" title="Land conversion">Land conversion</a></li> <li><a href="/wiki/Land_management" title="Land management">Land management</a></li> <li><a href="/wiki/Vegetation" title="Vegetation">Vegetation</a></li> <li><a href="/wiki/Infiltration_(hydrology)" title="Infiltration (hydrology)">Infiltration (hydrology)</a></li> <li><a href="/wiki/Groundwater" title="Groundwater">Groundwater</a></li> <li><a href="/wiki/Crust_(geology)" title="Crust (geology)">Crust (geology)</a></li> <li><a href="/wiki/Impervious_surface" title="Impervious surface">Impervious surface</a>/<a href="/wiki/Surface_runoff" title="Surface runoff">Surface runoff</a></li> <li><a href="/wiki/Petrichor" title="Petrichor">Petrichor</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="3"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Project page"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/7/72/Symbol_project_class.svg/16px-Symbol_project_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/7/72/Symbol_project_class.svg/23px-Symbol_project_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/7/72/Symbol_project_class.svg/31px-Symbol_project_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Wikipedia:WikiProject_Soil" title="Wikipedia:WikiProject Soil">Wikipedia:WikiProject Soil</a></li> <li> <span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Category:Soil" title="Category:Soil">Category soil</a></li> <li>  <a href="/wiki/Category:Soil_science" title="Category:Soil science">Category soil science</a></li> <li><span class="noviewer" typeof="mw:File"><span title="List-Class article"><img alt="" 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