Soil Potassium Effects on Cotton Lint Yield and Fiber Quality on the Texas High Plains

When comparing soil potassium (K) levels common in West Texas to the current Mehlich III-K critical for cotton (Gossypium hirsutum L.), fertilizer K applications are seldom recommended. However, when is applied, positive responses yield have been reported. Studies were conducted Lamesa and New Deal, TX to: 1) determine effects on leaf concentrations; 2) evaluate whether application increases crop growth, yield, fiber quality sufficient soils; 3) under water deficit conditions also quality. In Lamesa, muriate of potash (KCl) was applied using two methods, knife-injected (0-0-15) broadcast (0-0-60); at KCl knife injection. Potassium rates included 0, 45, 90, 135, 180 kg ha-1 with both high (90% ET) low (30% irrigation levels. At 2016 90% ET irrigation, lint greater 90 (2,153 lint) compared treatment, all treatments 30% irrigation. There no differences 2017 Lamesa. similar amongst years. Although increased level application, observed water-deficit suggesting further research needed better understand dynamics semiarid production systems.