Title: Phosphorus and Potassium Placement Methods for Corn and Soybeans Managed with No-Till and Chisel-Plow Tillage
Abstract: Materials and MethodsContinued no-till management can change many soil properties and crop yield compared with tillage.Broadcast phosphorus (P) and potassium (K) fertilization with no-till results in significant accumulation of both nutrients near the soil surface and, therefore, subsurface band fertilization could be more effective.A study was initiated in 1994 to compare no-till and chisel-plow tillage and fertilizer placement methods for a corn-soybean rotation.Floyd is the predominant soil, and the area initially tested Very High in P (33 ppm, Bray-1) and Optimum in K (140 ppm).The study includes four trials: P for corn, P for soybean, K for corn, and K for soybean.Both crops are grown each year by alternating adjacent areas.Treatments are applied for both crops, which are planted using a 30-in.row spacing.Cornstalks of plots managed with tillage are chisel-plowed in the fall and field-cultivated in spring.Soybean residues only are field cultivated in spring.