Correction of low soil test K values in the subsoil can be accomplished with deep band placement of potassium. Soil test K values at the 10"-15" depth were increased 1 lb/A with each 3.5 lb K₂O/A applied annually in a deep band for 4 years Cotton lint yields were increased with a combination of subsoiling and deep band potassium. More potassium was needed in the drier years than in the wetter years to maximize yields. Lint yields did not increase significantly with ripping alone. Tap root lengths were increased by the combination of subsoiling and deep banded potassium. In general, applied potassium increased yields in the upper 2/3 on the cotton plant.