CINXE.COM
Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "acsess.onlinelibrary.wiley.com",cType: 'managed',cRay: '8e9561023e3a600a',cH: 'tz5nxTqZzy9dF90YocEnwy54gVhYxUWCfkA4gfBFJkY-1732744699-1.2.1.1-WylBv9RzS_tZf3s1fmPwSklRaBTynYMFujYMHuM78mNytsEeMSm9OCOyAYDp70lm',cUPMDTk: "\/doi\/10.2134\/agronj1976.00021962006800020026x?__cf_chl_tk=9eJ6D.HDK.09UenobBx0kJZe0O9yoMK2BBm6ry0itwk-1732744699-1.0.1.1-j9Td6sY.DVV.MCx5vtI_5XsrJPRQ3zFhuFbzJiFWyis",cFPWv: 'b',cITimeS: '1732744699',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/doi\/10.2134\/agronj1976.00021962006800020026x?__cf_chl_f_tk=9eJ6D.HDK.09UenobBx0kJZe0O9yoMK2BBm6ry0itwk-1732744699-1.0.1.1-j9Td6sY.DVV.MCx5vtI_5XsrJPRQ3zFhuFbzJiFWyis",md: "ezzWQUeJp.j4D_i.fpveS28kp_NmWHmdDEh4JwU9EA0-1732744699-1.2.1.1-g9YRqb.mobubIE.LZ0EohJHvcSTq5JjtNDUY0ghqu.Dc1MwbNV9i5YjXQvaeQhYatx5p7xSuo0G1.HW3Jr4zzQj4h.NhWAJeXGgm3GpgZLMkP7Zn6RZPyWMl5NxXFGs3lDodvX8XY3SJ1tkvli7M9y_Iz0OI3WFRCeQpOR6.e.4Ra6.3giYAgxYdTef0dyiBQb_l13ZOWkLXN.cmnQTArr4oL8WTE4x6W.vcAO_RCqzdAnoL8_GltRfng5fuqa88BvLOWD5BQ1pgCwVAlEB62TAAgYIpIMh.nQUCY5ReSddWzZP0AQWGfA1tw7Ooc6V9d8UtbqRxYVJvIxjST199LLEdUIgeuramba_wzLI9Vrpp1GTAL8Lqq19sSEs44F4uikXhtWg24Lw_ClX9iXxIvWhkiNC278HpqwLkrp0ha.fRrN7mzr7_PmQ7i8LJSVN5hYPrlWUQOkEr8hmJR0QKmNBMHi_CYZe6FMzRp8cPqAkv1FclZgxHn.xPUnzD7bsQ6wAaoD7giQtOFZl2n5tgCiJu_JqcKG9sIhrbNJahe.ZEF9ZdIovilxoT25B_wsc9dBk4XkXgkOKrOcywm7F9PReTuPHXfnk6HJoMASyzGniikQ74zQzOR0FBIwovXICQ8AYB_QS6cFBMp1G_dbR9XwEU1sx5z3juLQ3lFcpi4x2jakPH73hP4dCaCcZABSMfuQoTi3s0qL2kAEg4bowJSoD1f5VSkzb887j3PxMbEaEnyeDxQWDMSnmhQ8LDJaJaDpRfTJsDuk5Yb00n9z2Fb06X7GNLW4E3khu8FaC4FTAP0GWnCvkrHBfDeao3CYs2xxPotzRvXucNsQzBf_1S7_4Kq_YHq.yV4PWEwM3incTMahGeBc2Tw3SIK9oIwzmKqtsCfK5S9GQEsGE1_2jYNmpJxomzsmYJqGiHGITal9IN4E_MU9slqkIHlz7gg5z2wBgdJuDkz6h10gQfWZ9agSo4WGdDB8UCBTYOYx89L5YAHRVjYEXIjFmNst7HvWZtD721AqeYdPISdG9xCpXxmis9R4XlAbrAeRVVEPbacnM.BKvQhJFv0iEfTUssF0wbHGFlG_7maX4eX8.FnorKBPBwmEag5z4mBL9c9T7NA4bUyVRHqUA2.GBkxmFt7.9nIYpCRmtn0Ezp3Rw7FBxZYl0Nqlp6BUN03lN9kBGn0LWeaWMD3t6L6gzrGCVRAaAO_NwWwHYzxmMh1sbFBnNRkClfLRT.cpKT9EokTtkD_hEkU6iG69y.9pILYxE5_TPQFTOsMGP64yO0U2Yp.hC7M.xn4upCSGgXiEYKp8z..8tTEgb6SFd4KbwlA6Pf0LL38L8nUP_iooVX0Jn9vnkDQH6NoqTGrrBUQmlBhMjbpgelRTIN1pahldt4umRLEytkYSppt9ExscFXkERmCb4l3uQKrSQ_YOXYRQ7tdOV0L9Oj_hlq8gLjFjgqgnMq1UIFC2MJTVKSuSnKG3KYGtsHLfIAYarCijMUkg1wVyqq4sTxjCZ5Yws9gskNU.7Dzi0x.Ayi1Yy8T267Kwshdzc5geEg7_8.gD.0GVQvCg9KQVspmwU7ovhB.PrvMxcZ4UtcJxesaXViJ1sxiK_mOTSaLSiLK4YtGdYm502TRC4P9XveSUMFafJ4y3YCdc0dALuHW0SrFolsdvrafszvqJ_DIpproYHTgTdABTtpVFxfCvTIqL14gChQug0d5t7TAAR.8FzApieeJwD5lYlcsn0z3V6PZ2SJ3mTTyrNL2ErkFsW_WCoxXVoh3RX7vsncXIIUnPsq8XT2zLROLzVRMOesRazcPYws5nKA7y62nfUfmaDOXH_idRzMNGX_kIkxS5xNoKV.s4HK3JLxaOcHq7V7tlxgL0x.N_js933a2.5Cs3irVG0VHI8Uvqa6zHIA7XaBkSrJ_gExvHuS7.R._evGGnOZLFKwEIj.hkEFOlTy8lT25rkOV1OANu9nNhEIPuvJ8VjQU8k4akByH1Ci_nH1Dq09XW5RopbIieAAZkmBzK8YOEUau4yMx0XtR1I2PC4dC30U8t6Sf2op2mF9dDUTImkS_ZXHhvXwmDVfLQ8JZmGHXk_QhK26xkBlV17lkUJrywKDnAkaaZ48ChawM1I.9dmD4cG52cgj.X2tSeTlniRqBhNWZEgN72RmVl5xdkCVD39jvgM1QWiJwSSEeTrqVN2kP1zU2It0w67M_tL_WQpslu1xxGDJpnCuV69Vcclx5D9l0GoA9MJaKEkMglXl97tbtcq_BCsqUGnw7zlV7Plt1HsEf_8KdNmt71O6yKBDgRJCae9qEMuANp5XMRyRKduCJZCQMErczIZRlFVCRA1fmMl4AWgEv1o7ZdXKJ2wUUYpLEeyfzPX5zUcSwQP2iJsCwkiaPtl2jsVv2gs08beX1ni9.DRvxCd4RHDLitv8ckmNZjszIA.AHAM9RUKprml2Z3dwwZVd1MgKsIK7IRj0bEE5utvQskUaFYKJoAnDCG6J6SeHmNyfCp0PttuLOZER1X5jJ3UOQCpfKNV_wYrupMMgcFEcotxYUCGVf40BANOTU5rgDKDJEkA7GVU04rwXN4p.iiGW4LaYUOlot3fPLjT1XQGfe.QSQViiVHkBAL0865A37McqjtpnSjyIbW7RmI47QOa4HRKjlMPHmLXLFjzZoTKytX4UNC8NXhhAvHefAnspJLgxY3pssr80Tf8koQslfH9glaQylvuSaZhTM_5dit83X5dXFPIDyGIzwA_kKl6KbC5fpi7Jx2fFbWFL7qCuiepe1udVha2qJ.JXOjUMrS7a9rH2OpkbHj2O6fWRRQavD1HQZatUKH3AqhKgSNXo6j8X8NJiF5PVQPYw3A3OulTtrtjrCoBFDPcgwro3wlAujCBP2Mw61G_3_o5TfX4Vk0Dr7iJH7oxtJZ1iyS92kS_TKh.1TfrWMdPvv5JULQiIWoKzSWMj1yw.ho2_.FBAiR9N9JEuXkA7VQi7EZZZ6.Bod6cfbKlxSQJ9Wsf4zXGl6mZJgMQnvIxQieX6ptd.KJ9mLM86NjUf5BI",mdrd: "T7lfQvDg08OWwftojBsqtLxiaQ1T2DPP7nBRB_GPwgE-1732744699-1.2.1.1-YWQglJZakMf6rByWmyEPap9NqTe74bMcH6dTGBkH3Y2u_jzdl2Rg6zrc8yU4e0fxRdAiaB603JnY9Lr3SQDKqehCsSWg42eqQG5nJUkWwttWboOoD4luN8GradF_nSQRf31lWrTP4fsPF4mWZ7GerWK6pO7I6j.e4lha0qd0TQ.u4q09UPOWViKm8z9LuD2rdmYS55BisqfpEx64ICzH0nsqSUZhC5H1qX49nOpAYcEGLruZfYsK0qJgNolTdZmLJGodkJ.HBJOGygaSYw0vKRigBSZOdnkG74D56yc8IVGJk8uN0uv9Oo247DOXgYD_zq5OWQ4KoYZXZ.KCsRjw98qIQpBEhwAmc8PXz_jTWSWYSthovXelcaUw7d.z0XRAWNrok25JnekDQO.GLi_h2gNUercHFsm1FPfo5.BIYaCqdiUAzRbytFNLob.3aKS.3RJUBSkHRJYl01md58xpMQ158JU2uY9GVMAoQ_JCsZC9yoLIp10dJE7JJF4Azv43ppndE0bZaicz17f4FPt1Fyxx0_sfo2EOAOEKK._tWa6BOxOnLcnGx7c25kuCNJQkKcoeIYTboXUHtoqFuYxzaxPTMtqYV1_7WFKb00AcrGZiaXUINUqAVEJdD_PndJtAroHOvhQidj44PTn.Mdls8zQhKvftJc2dZcm52x8185vKBOWYVTlqMA87VeV8AYSv6DJCPmOgOzp36uXv8UcUWHSYALldE3AfmcpScTkCAlw5uLtgIx5m6WFbqgZnM.B16PgfsMV5M6oR7xuWGEvpZYqkCnVqRMTKgcIRriMA5liBi4TQj7wSE9b._FCZ7ZZ3G4t_PdmIPo9CjlR5jCbrvDcH0KQjrDbx_ZaV1Isw6Dv.D2DZ3LDL.GWjlnAQiHAkT73vAAGk1D.rhWPBp1QG27EnH7Pmr.fknsB5NdJ_E2RZ.7K9CcwENHIHeoZBcmXIxLj66AqZTXGZ5OFumF8Y1LVmRUmzbrJewKhIkRbT3ft86v04dm4EkLlRX_AGlT.eCGdnCF2yc7rzEU4Cgvrgdbs7yBWzcMo7qHFwj87O57c3MXqSR_SbgYvy1uQGh4GUO4AUHD4HOnC_ZhIrYTAJWGUkh0ibf02cqitlIPZaZblLo5Ui2sMFQ94KfRhgXxoWMPbztoD2hpGinnQK3eqLdqUcrdn_1O2B48BH_4vQkOZIejQ60DhmbjqpDt6zndA22B4XFU2wKdinaJ1Gjke_bfzu6ndO83T1uLZGQyRKqHzv9XX9FoKtLBsbfVsmker7JW2O2q69u5f8ljvITARId0s1waTsBYgjAPfUXhEmAC74LwLIWM6e1kNJcouglZuOLL50PnJaEafsmA8WlNr.baV1ceFfus1CLX8zVGfn45hCW7IeFOtZ0K0CKevV7uxnM2mNXK5BO5Y3JRQR01VVO4kkW18jqm6svPrttWH1jmGkpckVEmJpWHk3TGEONN2oqoqukdDmCzuMZio.uBqiBvzIYP3qrm3iLOKaQ6T5Rnf51wcSEdSK3cKsVcpqeYavH9e1OZ2WfnqLfQe89HXA2EEHL5z2MalznEQTmv6kTFy7f.wQ7gCQlPXRN7b8Zq99MoXMvnuX8OLHdpCxq_e6ycI.A5OVFksjrxVdKHHxgu._yOxSeTa0mvjCHhW.ogmXk8K8ahqcokVuD8pnEwF3pQJOO1Z9OnlbYXXsuYvF4YLWyYA.XbIsPQFg6cxr.9hieY91usR4eNSibe7HOnBky6.259j22kEYxTzBHYqQv93dDG0buI5yWj92SLisR8fV9zVuClxZW638BEegyWDCLJteczgSWcj.O75ZC2WePeZ8UbkC4l7zcejivgmmRBBx5NMRK5BfL.VJ10MYqLddK9.sWZ9mtanFTXSm.oK02wZQFQnAmBg.Vwgkp86T8MOmN18UFo1ejEESiaaOzlOPQHeimZIoATziNnTFCyt4Rua_Dxe81spHPXfDofwruL4UBHsTSR8HQXSIj8MsXEING7988hBqVDlR5xGa9o6wR50"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=8e9561023e3a600a';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/doi\/10.2134\/agronj1976.00021962006800020026x?__cf_chl_rt_tk=9eJ6D.HDK.09UenobBx0kJZe0O9yoMK2BBm6ry0itwk-1732744699-1.0.1.1-j9Td6sY.DVV.MCx5vtI_5XsrJPRQ3zFhuFbzJiFWyis" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>