Browsing by Author "Boman, Randy"

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    Cotton yield response to soil applied potassium across the U. S. Cotton Belt
    Lewis, Katie; Morgan, Gaylon; Frame, William Hunter; Fromme, Daniel; Dodds, Darrin M.; Edmisten, Keith L.; Robertson, Bill; Boman, Randy; Cutts, Trey; Delaney, Dennis P.; Burke, Joseph Alan; Nichols, Robert L. (2021-05-11)
    Across 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 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.