Item Details

Title: Phosphorus and Potassium Fertilization for Corn and Soybeans Managed with No-till and ChiselPlow Tillage

Date Published: 2001
Author/s: Antonio P. Mallarino, David Rueber
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Affiliation: Iowa State University
Keywords: Agronomy


This study was initiated in 1994 to study phosphorus (P) and potassium (K) fertilizer placement for corn and
soybeans managed with no-till and chisel-plow tillage. No-till management involves less incorporation of
residues and fertilizers with soil than other systems. Broadcast fertilization could result in low fertilizer use
efficiency in no-tilled soils because P and K accumulate at or near the soil surface. Banding fertilizers with the
planter could be an effective practice but planter attachments apply low rates of fertilizer to shallow bands.
Deeper and larger fertilizer applications may be needed. This study is being replicated at four other research
farms to obtain data from various soils and climatic conditions.