CROPWATCH

Soil Potassium Availability: The Roles of Manure, Irrigation and Potassium Feldspar

Why do Nebraska soils tend to have high potassium (K) availability, even with high yields and often without fertilizer K application? Why are yield responses to fertilizer-K infrequent (Figure 1)? The answers lie in the K applied in manure and irrigation water, and soil mineralogy. Click for More