Soil Fertility Home Page
Welcome to the Iowa State University Agronomy Extension Soil Fertility Home Page. Nutrient topics are listed on the left side. Simply click on a topic of interest and you can find information about that topic, including Extension publications, newsletter articles, conference proceedings and reports, presentations, and links to other related sites. Links also provide access to soil fertility decision aid tools, a photo gallery, and the ISU Soil and Plant Analysis Laboratory.
MAKE RATIONAL DECISIONS ABOUT PHOSPORUS AND POTASSIUM MANAGEMENT WITH UNFAVORABLE CROP PRICES
Antonio P. Mallarino, Department of Agronomy, Iowa State
September 16, 2015
Crop prices have been declining and there is considerable uncertainty about the future. Phosphorus (P) and potassium (K) fertilizer prices have remained approximately constant or have declined slightly. Therefore, producers are thinking of reducing application rates. There are a few things to consider when making decisions with unfavorable crop/fertilizer price ratios. Read on.
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