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<!DOCTYPE html> <html lang="en" class="no-js"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="applicable-device" content="pc,mobile"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta name="robots" content="max-image-preview:large"> <meta name="access" content="No"> <meta name="360-site-verification" content="1268d79b5e96aecf3ff2a7dac04ad990" /> <title>Soil aggregation, aggregate-associated organic carbon, and total nitrogen under different land use in Regosols of coastal arid lands in Gabes, Tunisia | Arabian Journal of Geosciences </title> <meta name="twitter:site" content="@SpringerLink"/> <meta name="twitter:card" content="summary_large_image"/> <meta name="twitter:image:alt" content="Content cover image"/> <meta name="twitter:title" content="Soil aggregation, aggregate-associated organic carbon, and total nitrogen under different land use in Regosols of coastal arid lands in Gabes, Tunisia"/> <meta name="twitter:description" content="Arabian Journal of Geosciences - This study investigates soil aggregate distribution, soil organic carbon (SOC), and total nitrogen (TN) concentrations in total soil and within aggregates under..."/> <meta name="twitter:image" content="https://static-content.springer.com/image/art%3A10.1007%2Fs12517-021-08289-4/MediaObjects/12517_2021_8289_Fig1_HTML.png"/> <meta name="journal_id" content="12517"/> <meta name="dc.title" content="Soil aggregation, aggregate-associated organic carbon, and total nitrogen under different land use in Regosols of coastal arid lands in Gabes, Tunisia"/> <meta name="dc.source" content="Arabian Journal of Geosciences 2021 14:18"/> <meta name="dc.format" content="text/html"/> <meta name="dc.publisher" content="Springer"/> <meta name="dc.date" content="2021-09-01"/> <meta name="dc.type" content="OriginalPaper"/> <meta name="dc.language" content="En"/> <meta name="dc.copyright" content="2021 Saudi Society for Geosciences"/> <meta name="dc.rights" content="2021 Saudi Society for Geosciences"/> <meta name="dc.rightsAgent" content="journalpermissions@springernature.com"/> <meta name="dc.description" content="This study investigates soil aggregate distribution, soil organic carbon (SOC), and total nitrogen (TN) concentrations in total soil and within aggregates under different land uses in Regosols of Ghannouch, southern arid region of Tunisia. From three sites, i.e., native soils (NS), olive-growing soil (OG), and seasonal-crop soil (SC) land use, four depths were sampled (0–10, 10–20, 20–40, and &gt;40 cm) and separated into three aggregate-size classes (macroaggregates &gt;0.250mm; microaggregates 0.250–0.050 mm; and &lt;0.050 mm size class). The SOC and TN concentrations in total soil were higher and decreased with depth in SC and in OG than in NS land use. The three land uses showed that microaggregates constituted the major proportion (65–92%) across depths. Macroaggregate amounts were 4 to 5 times higher in NS than in SC and OG. The SOC and TN tend to be concentrated in macroaggregates and in &lt;0.050mm size class in OG and SC soils. Nevertheless in NS, SOC and TN concentrations were higher in &lt;0.050-mm size class. The increase of SOC and TN within aggregates is the result of the increase of SOC in total soil. We observed that cultivation enhances SOC and TN of Regosols, but it decreases their physical protection within macroaggregates. Moreover, higher positive correlation was found between SOC in total soil and SOC in macroaggregates (r=0.81). More studies about the distribution of SOC and TN in soil aggregates are required in arid soils to improve their fertility and to enhance their function as a sink of greenhouse gases."/> <meta name="prism.issn" content="1866-7538"/> <meta name="prism.publicationName" content="Arabian Journal of Geosciences"/> <meta name="prism.publicationDate" content="2021-09-01"/> <meta name="prism.volume" content="14"/> <meta name="prism.number" content="18"/> <meta name="prism.section" content="OriginalPaper"/> <meta name="prism.startingPage" content="1"/> <meta name="prism.endingPage" content="12"/> <meta name="prism.copyright" content="2021 Saudi Society for Geosciences"/> <meta name="prism.rightsAgent" content="journalpermissions@springernature.com"/> <meta name="prism.url" content="https://link.springer.com/article/10.1007/s12517-021-08289-4"/> <meta name="prism.doi" content="doi:10.1007/s12517-021-08289-4"/> <meta name="citation_pdf_url" content="https://link.springer.com/content/pdf/10.1007/s12517-021-08289-4.pdf"/> <meta name="citation_fulltext_html_url" content="https://link.springer.com/article/10.1007/s12517-021-08289-4"/> <meta name="citation_journal_title" content="Arabian Journal of Geosciences"/> <meta name="citation_journal_abbrev" content="Arab J Geosci"/> <meta name="citation_publisher" content="Springer International Publishing"/> <meta name="citation_issn" content="1866-7538"/> <meta name="citation_title" content="Soil aggregation, aggregate-associated organic carbon, and total nitrogen under different land use in Regosols of coastal arid lands in Gabes, Tunisia"/> <meta name="citation_volume" content="14"/> <meta name="citation_issue" content="18"/> <meta name="citation_publication_date" content="2021/09"/> <meta name="citation_online_date" content="2021/09/01"/> <meta name="citation_firstpage" content="1"/> <meta name="citation_lastpage" content="12"/> <meta name="citation_article_type" content="3rd CAJG 2020"/> <meta name="citation_language" content="en"/> <meta name="dc.identifier" content="doi:10.1007/s12517-021-08289-4"/> <meta name="DOI" content="10.1007/s12517-021-08289-4"/> <meta name="size" content="201527"/> <meta name="citation_doi" content="10.1007/s12517-021-08289-4"/> <meta name="citation_springer_api_url" content="http://api.springer.com/xmldata/jats?q=doi:10.1007/s12517-021-08289-4&api_key="/> <meta name="description" content="This study investigates soil aggregate distribution, soil organic carbon (SOC), and total nitrogen (TN) concentrations in total soil and within aggregates "/> <meta name="dc.creator" content="Bouajila, Abdelhakim"/> <meta name="dc.creator" content="Omar, Zohra"/> <meta name="dc.creator" content="Magherbi, Ghalya"/> <meta name="dc.subject" content="Earth Sciences, general"/> <meta name="citation_reference" content="citation_journal_title=Eur J Remote Sens; 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From three sites, i.e., native soils (NS), olive-growing soil (OG), and seasonal-crop soil (SC) land use, four depths were sampled (0–10, 10–20, 20–40, and >40 cm) and separated into three aggregate-size classes (macroaggregates >0.250mm; microaggregates 0.250–0.050 mm; and <0.050 mm size class). The SOC and TN concentrations in total soil were higher and decreased with depth in SC and in OG than in NS land use. The three land uses showed that microaggregates constituted the major proportion (65–92%) across depths. Macroaggregate amounts were 4 to 5 times higher in NS than in SC and OG. The SOC and TN tend to be concentrated in macroaggregates and in <0.050mm size class in OG and SC soils. Nevertheless in NS, SOC and TN concentrations were higher in <0.050-mm size class. The increase of SOC and TN within aggregates is the result of the increase of SOC in total soil. We observed that cultivation enhances SOC and TN of Regosols, but it decreases their physical protection within macroaggregates. Moreover, higher positive correlation was found between SOC in total soil and SOC in macroaggregates (r=0.81). More studies about the distribution of SOC and TN in soil aggregates are required in arid soils to improve their fertility and to enhance their function as a sink of greenhouse gases."/> <meta property="og:image" content="https://static-content.springer.com/image/art%3A10.1007%2Fs12517-021-08289-4/MediaObjects/12517_2021_8289_Fig1_HTML.png"/> <meta name="format-detection" content="telephone=no"> <link rel="apple-touch-icon" sizes="180x180" href=/oscar-static/img/favicons/darwin/apple-touch-icon-92e819bf8a.png> <link rel="icon" type="image/png" sizes="192x192" href=/oscar-static/img/favicons/darwin/android-chrome-192x192-6f081ca7e5.png> <link rel="icon" type="image/png" sizes="32x32" href=/oscar-static/img/favicons/darwin/favicon-32x32-1435da3e82.png> <link rel="icon" type="image/png" sizes="16x16" href=/oscar-static/img/favicons/darwin/favicon-16x16-ed57f42bd2.png> <link rel="shortcut icon" data-test="shortcut-icon" href=/oscar-static/img/favicons/darwin/favicon-c6d59aafac.ico> <meta 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From three sites, i.e., native soils (NS), olive-growing soil (OG), and seasonal-crop soil (SC) land use, four depths were sampled (0–10, 10–20, 20–40, and >40 cm) and separated into three aggregate-size classes (macroaggregates >0.250mm; microaggregates 0.250–0.050 mm; and <0.050 mm size class). The SOC and TN concentrations in total soil were higher and decreased with depth in SC and in OG than in NS land use. The three land uses showed that microaggregates constituted the major proportion (65–92%) across depths. Macroaggregate amounts were 4 to 5 times higher in NS than in SC and OG. The SOC and TN tend to be concentrated in macroaggregates and in <0.050mm size class in OG and SC soils. Nevertheless in NS, SOC and TN concentrations were higher in <0.050-mm size class. The increase of SOC and TN within aggregates is the result of the increase of SOC in total soil. 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focusable="false" role="img" aria-hidden="true" class="u-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-mail-medium"></use></svg></a><sup class="u-js-hide"><a href="#Aff1">1</a></sup>, </li><li class="c-article-author-list__item"><a data-test="author-name" data-track="click" data-track-action="open author" data-track-label="link" href="#auth-Zohra-Omar-Aff1" data-author-popup="auth-Zohra-Omar-Aff1" data-author-search="Omar, Zohra">Zohra Omar</a><sup class="u-js-hide"><a href="#Aff1">1</a></sup> & </li><li class="c-article-author-list__item"><a data-test="author-name" data-track="click" data-track-action="open author" data-track-label="link" href="#auth-Ghalya-Magherbi-Aff1" data-author-popup="auth-Ghalya-Magherbi-Aff1" data-author-search="Magherbi, Ghalya">Ghalya Magherbi</a><sup class="u-js-hide"><a href="#Aff1">1</a></sup> </li></ul> <div data-test="article-metrics"> <ul class="app-article-metrics-bar u-list-reset"> <li class="app-article-metrics-bar__item"> <p class="app-article-metrics-bar__count"><svg class="u-icon app-article-metrics-bar__icon" width="24" height="24" aria-hidden="true" focusable="false"> <use xlink:href="#icon-eds-i-accesses-medium"></use> </svg>526 <span class="app-article-metrics-bar__label">Accesses</span></p> </li> <li class="app-article-metrics-bar__item app-article-metrics-bar__item--metrics"> <p class="app-article-metrics-bar__details"><a href="/article/10.1007/s12517-021-08289-4/metrics" data-track="click" data-track-action="view metrics" data-track-label="link" rel="nofollow">Explore all metrics <svg class="u-icon app-article-metrics-bar__arrow-icon" width="24" height="24" aria-hidden="true" focusable="false"> <use xlink:href="#icon-eds-i-arrow-right-medium"></use> </svg></a></p> </li> </ul> </div> <div class="u-mt-32"> </div> </header> </div> <div data-article-body="true" data-track-component="article body" class="c-article-body"> <section aria-labelledby="Abs1" data-title="Abstract" lang="en"><div class="c-article-section" id="Abs1-section"><h2 class="c-article-section__title js-section-title js-c-reading-companion-sections-item" id="Abs1">Abstract</h2><div class="c-article-section__content" id="Abs1-content"><p>This study investigates soil aggregate distribution, soil organic carbon (SOC), and total nitrogen (TN) concentrations in total soil and within aggregates under different land uses in Regosols of Ghannouch, southern arid region of Tunisia. From three sites, i.e., native soils (NS), olive-growing soil (OG), and seasonal-crop soil (SC) land use, four depths were sampled (0–10, 10–20, 20–40, and >40 cm) and separated into three aggregate-size classes (macroaggregates >0.250mm; microaggregates 0.250–0.050 mm; and <0.050 mm size class). The SOC and TN concentrations in total soil were higher and decreased with depth in SC and in OG than in NS land use. The three land uses showed that microaggregates constituted the major proportion (65–92%) across depths. Macroaggregate amounts were 4 to 5 times higher in NS than in SC and OG. The SOC and TN tend to be concentrated in macroaggregates and in <0.050mm size class in OG and SC soils. Nevertheless in NS, SOC and TN concentrations were higher in <0.050-mm size class. The increase of SOC and TN within aggregates is the result of the increase of SOC in total soil. We observed that cultivation enhances SOC and TN of Regosols, but it decreases their physical protection within macroaggregates. Moreover, higher positive correlation was found between SOC in total soil and SOC in macroaggregates (<i>r</i>=0.81). More studies about the distribution of SOC and TN in soil aggregates are required in arid soils to improve their fertility and to enhance their function as a sink of greenhouse gases.</p></div></div></section> <div class="c-notes"> <p class="c-notes__text c-status-message--info"> <svg width="24" height="24" focusable="false" role="img" aria-hidden="true" class="c-status-message__icon"> <use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-info-filled-medium"></use> </svg> This is a preview of subscription content, <a id="test-login-banner-link" href="//wayf.springernature.com?redirect_uri=https%3A%2F%2Flink.springer.com%2Farticle%2F10.1007%2Fs12517-021-08289-4%3Ferror%3Dcookies_not_supported%26code%3D949ff082-a938-4f9e-8b6a-97cfc87c7186" data-track="click" data-track-action="login" data-track-label="link" class="c-preview-message__link">log in via an institution</a> <svg width="16" height="16" focusable="false" role="img" aria-hidden="true" class="u-icon 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aria-labelledby="Bib1" data-title="
 
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Soil aggregation, aggregate-associated organic carbon, and total nitrogen under different land use in Regosols of coastal arid lands in Gabes, Tunisia. <i>Arab J Geosci</i> <b>14</b>, 1933 (2021). https://doi.org/10.1007/s12517-021-08289-4</p><p class="c-bibliographic-information__download-citation u-hide-print"><a data-test="citation-link" data-track="click" data-track-action="download article citation" data-track-label="link" data-track-external="" rel="nofollow" href="https://citation-needed.springer.com/v2/references/10.1007/s12517-021-08289-4?format=refman&flavour=citation">Download citation<svg width="16" height="16" focusable="false" role="img" aria-hidden="true" class="u-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#icon-eds-i-download-medium"></use></svg></a></p><ul class="c-bibliographic-information__list" data-test="publication-history"><li class="c-bibliographic-information__list-item"><p>Received<span class="u-hide">: </span><span 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