出典:Wikipedia
出典:『Wikipedia』 (2011/01/05 14:00 UTC 版)
Nutrient management is a system used by farmers to manage the amount, form, placement, and timing of the application of nutrients(whether as manure, commercial fertilizer, or other form of nutrients) to plants. The purpose is to supply plant nutrients for optimum forage and crop yields, to minimize nonpoint source pollution (runoff of pollutants to surface water) and contamination of groundwater, and to maintain and/or improve the condition of soil.