Nutrient balance is important to develop environmentally friendly agriculture. Phosphorus surplus in nutrient balance was more serious than that of nitrogen. Nitrogen and phosphorus exceeded twice the requirement at 30 cities/counties and 32 among 165, respectively. Given livestock waste and optimal nutrient balance, the proper number of animal feeding was 1.68LU/ha. Considering livestock waste only, the optimal number of livestock feeding was 3,918,000LU (heads) and, including fertilizer that would be 2,288,000LU. It is recommended to introduce the regional control system to regulate nutrient input and output, and the trading system of livestock feeding rights to control that.

Ⅰ. 서론 Ⅱ. 농업환경 오염과 한국농경지의 양분수지 Ⅲ. 축산업의 환경오염과 양분수지 Ⅳ. 가축분뇨 자원화의 경제성 분석 Ⅴ. 요약 및 결론 참고문헌

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