Yield Response of Dryland Cotton to Soil–Applied Potassium in the Upper Gulf Coast and Central Blacklands of Texas

The frequency and severity of potassium (K) deficiency symptoms in the Central Blacklands and Upper Gulf Coast regions of Texas have increased in recent years.  While very dry conditions have contributed to this response, the clay-dominated soils in these areas have traditionally provided adequate K for optimum production.  Studies were initiated at two field sites where mid-season K deficiencies had been observed to investigate cotton yield response to soil-applied K fertilizer.  Treatments included 0, 25, 50, 75 and 100 pounds of K₂O/A applied before or shortly after planting.  Lint yield and fiber quality were collected at harvest.