Nutrient application based on test results
With lower grain prices, many producers are looking at where they can cut input costs. Nutrient applications usually are based on soil tests. Minnesota Agricultural Water Resource Center's George Rehm said soil tests are a valuable tool, but urged producers to be conscientious when basing nutrient application plans on test results. "I'm never going to give up on soil test values as a basis for making recommendations," Rehm said. "But soil testing is not like a bank account. Soil test values provide a relevant index of the probability of getting a response from applications."
A study at the U of MN West Central Research and Outreach Center, Morris, showed an application of 100 pounds per acre of phosphate upped soil test results for phosphorous, but another plot that received 50 pounds per acre of phosphate produced closer to optimum yields. Read more at Agrinews.com.