| definition |
- The USDA Soil Plant Nutrient Research Unit is involved with developing and
updating new knowledge required to efficiently manage soil, fertilizer, and
plant nutrient (emphasis on nitrogen) to achieve optimum crop yields, maximize
farm profitability, maintain environmental quality and sustain long-term
productivity.
Website: "http://spnr.ars.usda.gov/"
[Summary provided by the USDA.]
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