The need for commercial fertilizer to supplement the soil supply of available nutrients for crops has been amply demonstrated by agronomic research. Research workers in agronomy and agricultural economics, recognizing the importance of economics of fertilizer use for crop production, began cooperating on research projects designed to estimate the most profitable rates of plant nutrients for different soils.

This research provided information that enabled the farmers to make more efficient use of fertilizer, thereby leading to an over-all increase of efficiency in agricultural production. Because of the interest in the economics of fertilizer use, the research has undergone rapid development in recent years. Therefore, the objectives, procedures, and terminology of this research may seem obscure to those who are not familiar with it.

Source: https://www.sciencedirect.com/

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