FERTILIZER PLACEMENT, NUTRIENTS ABSORPTION AND CORN YIELD IN DIFFERENT SOIL TILLAGE SYSTEMS
Abstract
Effects of fertilizer placement and soil tillage systems in nutrient uptake and com yield were evaluated in the second year (1989) of a field experiment in a Rhodic Paleudult soil. The soil tillage systems, in the main plots, were conventional, strip, and no tillage; and fertilizer placements, in the plots, were broadcast, strip and row, with three repetitions. Fertilizers were applied as triple superphosphate (80 kg de P 202/ha = 35 kg P/ha) and potassium chloride (40 kg de K 20/ha=33 kg de IU ha). Phosphorus content in the plant tissuc at different com growth stages was affected by fertilizer placement and/or soil tillage systems; however, potassium uptake was not affected. Com growth and grain yield and nutrient contem were not influenced by treatments of fertilizer placement or soil tillage
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