Cotton yield response to soil applied potassium across the U. S. Cotton Belt

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dc.contributor.authorLewis, Katieen
dc.contributor.authorMorgan, Gaylonen
dc.contributor.authorFrame, William Hunteren
dc.contributor.authorFromme, Danielen
dc.contributor.authorDodds, Darrin M.en
dc.contributor.authorEdmisten, Keith L.en
dc.contributor.authorRobertson, Billen
dc.contributor.authorBoman, Randyen
dc.contributor.authorCutts, Treyen
dc.contributor.authorDelaney, Dennis P.en
dc.contributor.authorBurke, Joseph Alanen
dc.contributor.authorNichols, Robert L.en
dc.contributor.departmentVirginia Agricultural Experiment Stationen
dc.coverage.countryUnited Statesen
dc.date.accessioned2021-07-20T18:48:06Zen
dc.date.available2021-07-20T18:48:06Zen
dc.date.issued2021-05-11en
dc.description.abstractAcross the U.S. Cotton Belt, potassium (K) deficiency symptoms in cotton (Gossypium hirsutum L.) have become more common over the past decade. In 2015-2017, an experiment was conducted in Alabama, Arkansas, Louisiana, Mississippi, North Carolina, Oklahoma, South Carolina, two regions in Texas, and Virginia for a total of 23 site-years. The objectives were (a) to quantify soil K levels at-depth in representative soils where cotton is commonly grown in major cotton production regions with observed K deficiencies; and (b) to evaluate the effects of application method and K rates on cotton lint yield, loan value, and return on fertilizer investment. Granular and liquid potassium chloride were broadcast or injected, respectively, 2-4 wk prior to planting at 0, 45, 90, 135, and 180 kg K2O ha(-1). Locations other than Texas and Oklahoma generally had soil K levels <less than 150 mg kg(-1), the Mehlich III critical K level, and thus, a yield response to applied K fertilizer was expected. However, among the 23 site-years, a treatment effect was determined at 5 site-years. Two of those, Williamson County, Texas, and Virginia endured severe moisture stress and resulted in low yields (<526 kg lint ha(-1)). A positive lint yield response to knife-injected 0-0-15 was determined in 2015 at the Lubbock County, Texas, location-a location with high yield (>1,653 kg lint ha(-1)). Inconsistent yield responses among locations indicate that K dynamics in the soil-cotton plant system are not well understood and deserve continued investigation.en
dc.description.notesThe authors would like to extend their appreciation to Cotton Incorporated, Fluid Fertilizer Foundation, and International Plant Nutrition Institute for providing financial support for this Cotton Specialist Working Group project. This publication is dedicated to Dr. Robert Nichols, who was a strong supporter of K research in cotton throughout his career. His memory will live on in our continued efforts of gaining a better understanding of K dynamics.en
dc.description.sponsorshipCotton IncorporatedCotton R&D Corp; Fluid Fertilizer Foundation; International Plant Nutrition Instituteen
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1002/agj2.20719en
dc.identifier.eissn1435-0645en
dc.identifier.issn0002-1962en
dc.identifier.other1-15en
dc.identifier.urihttp://hdl.handle.net/10919/104231en
dc.language.isoenen
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivs 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.titleCotton yield response to soil applied potassium across the U. S. Cotton Belten
dc.title.serialAgronomy Journalen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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