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.
HIGH YIELDS, LOW GRAIN PRICES: MANAGE PHOSPHORUS AND POTASSIUM WISELY
Antonio Mallarino, Professor, Department of Agronomy, Iowa State
October 24, 2016
Bumper grain yields are being harvested from most Iowa fields this fall. However, due to low crop prices producers are thinking of reducing phosphorus (P) and potassium (K) fertilizer application rates. A few important management options should be considered when making decisions with unfavorable crop/fertilizer price ratios. Read on.
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