Start Date: 2011
Principal Investigator: Jeffrey Vetsch
Organization: University of Minnesota, Southern Research and Outreach Center
Research on potassium (K) fertilization of corn and soybean in Minnesota has not received a great deal of attention in recent years. Generally, resources have focused on nitrogen and phosphorus, because of greater potential economic return and environmental concerns related to these nutrients. During the last 10 years agriculture has experienced tremendous volatility of input and commodity prices, including fertilizer K (potash 0-0-60). Price volatility of inputs and commodities increases financial risk for growers. These financial risks include the risk of yield loss from inadequate fertilizer K application and risk of applying expensive fertilizer that may not be needed, especially on short-term rental farmland. These experiences have raised questions about K fertilization of agronomic crops.
K concentration and uptake in corn grain (crop removal) and stover (total K uptake) are not reported at this time.
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