The publication provides an overview of the test, research on correlation and calibration, specific procedures for using the test, and interpretation of test results. The basics and interpretation of the test are generally the same as the past. Guidelines are now specific for interpretation in manure-applied fields and corn following alfalfa, and an additional soil test category was added for those interpretations.
Iowa State University
Sawyer, John and Mallarino, Antonio, "A New Late-Spring Soil Nitrate Test Publication Now Available" (2017). Integrated Crop Management News. 2449.
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