Northeast Research and Demonstration Farm
Phosphorus (P) fertilization is needed for profitable crop production in most Iowa soils. Extensive research has been conducted for decades on crop yield response to P and calibration of soil-test P methods. Frequent changes in crop genotypes and increasing yield levels necessitates continuous research to revise and update management guidelines as needed. This report summarizes results of a multi-year experiment conducted to evaluate corn and soybean grain yield response to different P fertilization rates and soil-test P levels.
Mallarino, Antonio; Jones, John; Thompson, Louis; and Pecinovsky, Kenneth
"Corn and Soybean Grain Yield Response
to Different Phosphorus Fertilization Rates
and Soil-Test Phosphorus Levels,"
Farm Progress Reports: Vol. 2017
, Article 113.
Available at: https://lib.dr.iastate.edu/farmprogressreports/vol2017/iss1/113