Coordination of Management Practices Enhancing Total Efficiency (COMPETE): Indiana Project on Improving Assessments of Soybean Nutrient Needs, 2004
Nutrient stratification in soils managed with conservation tillage practices may be adversely affecting potassium (K) nutrition of soybeans. Can applications of K as subsurface bands improve K nutrition of soybeans in reduced tillage systems? This project is examining how soybeans respond to the residual effect of K banded in the previous season for corn. So far, results indicate that when soybeans are planted in narrowly spaced rows, residual K from more widely spaced subsurface bands may be inadequate when inherent soil K supplies are low. There may be a need to match the spacings of K bands with the spacing of soybean rows grown in reduced tillage systems. IN-23F
