Phosphorus (P) is an essential and major nutrient for both plants and animals. However, anthropogenic P in the environment may cause severe problems such as the deterioration of water quality. Therefore, it is essential for the Korean government to manage P in the agricultural sector. The annual P budget for Korea was 46 kg P ha-1 in 2013, placing Korea in second among Organication for Economic Co-operation and Development (OECD) countries. P surplus and deficiency in agricultural lands can be estimated according to the P budget, which is one of the OECD agri-environment indicators. In the P budget, it is important to ensure consistency in the input-output data sources, in order to apply national and regional policies for the environmentally sound management of agricultural P. This study examines the impacts on the input-output data sources in the regional P budget in Korea. P budgets were between 99-145 kg-P/ha, depending on different data sources. We suggest two recommended data combinations (DC 1 and DC 2) for reliability of the data. P budgets calculated using DC 1 and DC 2 were 128 kg-P/ha and 97 kg-P/ha, respectively. According to the results, one of the core factors affecting P budgets was crop production. In this study, DC 2 was recommended rather than DC 1 in order to consider the cultivated areas for various crops. It is also necessary to analyze the sensitivity of the coefficients used in P budget in the future.

Abstract
 1. 서 론
 2. 연구 방법
  2.1. OECD/Eurostat 인 수지 산정
  2.2. 본 연구에서 수정된 인 수지 산정법
  2.3. 인 수지 입력자료 출처별 조합
 3. 결과 및 고찰
  3.1. 자료 조합별 출처별 인 수지 유입 항목 비교
  3.2. 자료 조합별 출처별 인 수지 유출 항목 비교
  3.3. 인 수지 산정 결과
  3.4. 추천 자료 조합별 인 수지 산정 결과
 4. 결 론
 REFERENCES

• 임도영(국립환경과학원 물환경연구부) | Do Young Lim (Water Environment Research Department, National Institute of Environmental Research)
• 류홍덕(국립환경과학원 물환경연구부) | Hong-Duck Ryu (Water Environment Research Department, National Institute of Environmental Research)
• 정유진(국립환경과학원 물환경연구부) | Eu Gene Chung (Water Environment Research Department, National Institute of Environmental Research) Corresponding author
• 김용석(국립환경과학원 물환경연구부) | Yongseok Kim (Water Environment Research Department, National Institute of Environmental Research)