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Economics and nitrogen fertilization for corn and wheat in the Northern Great Plains
Author(s) -
Franzen Dave
Publication year - 2015
Publication title -
crops and soils
Language(s) - English
Resource type - Journals
eISSN - 2325-3606
pISSN - 0162-5098
DOI - 10.2134/cs2015-48-5-3
Subject(s) - quadratic equation , certification , human fertilization , reading (process) , agricultural economics , nitrogen fertilizer , economics , nitrogen , agronomy , graph , econometrics , mathematics , agricultural engineering , political science , discrete mathematics , biology , engineering , management , law , fertilizer , chemistry , geometry , organic chemistry
The traditional response of crop to N graph is a linear/plateau model, which has some problems. In contrast, most N rate studies result in a quadratic model. Economists are familiar with the quadratic input rate response and call it “the law of diminishing returns.” New research‐based N rate calculation tools in North Dakota and Montana are based on this. Earn 0.5 CEUs in Nutrient Management by reading this article and taking the quiz at www.certifiedcropadviser.org/certifications/self‐study/725