Recommendations of NPK Fertilizers based on Soil Testing and Yield Response for Radish in Highland
2009
Lee, G.J., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea | Lee, J.T., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea | Zhang, Y.S., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Hwang, S.W., National Institute of Crop Science, RDA, Iksan, Republic of Korea | Park, C.S., KTnG Central Research Institute, Daejeon, Republic of Korea | Joo, J.H., Kangwon National University, Chuncheon, Republic of Korea
An attempt was made to provide the most reasonable fertilizer recommendation for radish crop based on soil analysis data and yield response to the N, P, K fertilizers, which was obtained from field experiments on 2004 in highland, 850 meters above the sea level. Optimum times of NPK application to past application amount based on soil test were 0.90-0.770-0.50 for radish. The adjusted NPK recommendation models of highland soil were made by adding the application times to past application methods which were based on chemical properties of soil. The revised models for fertilizer application were recommended to decrease the amount of N, P, K by 10-23-50% for radish in highland. In application to total cultivation area, 2,546ha for radish, saving amounts of NPK fertilizers with these adjusted recommendation in comparison with past application levels will 244.4 tons for radish. Using the optimal application amounts for radish, we will can reduce agricultural pollution without affecting crop yields.
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