Armstrong Research and Demonstration Farm
No-till management results in little or no incorporation of crop residues and fertilizers with soil. Subsurface banding phosphorus (P) or potassium (K) fertilizers could be more effective than broadcast fertilization because both nutrients accumulate at or near the soil surface. Therefore, a long-term study was initiated in 1994 at this farm to evaluate P and K fertilizer application rates and placement methods for corn and soybean managed with no-till and chisel-plow tillage.
Iowa State University
Mallarino, Antonio P.; Butler, Jeff; and Havlovic, Bernard J., "Long-term Evaluation of Tillage Systems and Fertilizer Placement Methods for Corn and Soybean" (2010). Iowa State Research Farm Progress Reports. 303.