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Comparison of Farm Based Fertilizer Usage in 1992 and 1999  

Kim, Seok-Cheol (National Institute of Agricultural and Science Technology, RDA)
Park, Yang-Ho (National Institute of Agricultural and Science Technology, RDA)
Lee, Youn (National Institute of Agricultural and Science Technology, RDA)
Lee, Ju-Young (National Institute of Agricultural and Science Technology, RDA)
Kim, Chung-Su (Dept. of Agronomy, Chungnam National University)
Kim, Pil-Joo (Institute of Agriculture and Life Science, Gyeonsang National University)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.36, no.5, 2003 , pp. 344-355 More about this Journal
Abstract
Korea is one of those countries that have very high usage rates of chemical fertilizers per unit area of cropland. To reduce the fertilizer application rate, a variety of agricultural polices has been introduced since the 1990s. In this study, fertilizer usage was surveyed on the farm base throughout the country in 1999, and the data were compared with those of 1992. Organic fertilizer application rates were decreased in most cereal crops with time pass, but maintained similar levels in vegetables grown in plastic-film houses and in upland soils. Chemical fertilizer application rates were decreased in most of the cereal crops and vegetables surveyed; however, this reduction was concentrated in phosphate and potassium usage, but not in nitrogen. In spite of this decrease, the fertilizer application levels to most crops were maintained at levels much higher than recommended. In the nutrient balance, which was calculated from the difference between input (chemical and organic fertilizers) and output (agricultural products), the nitrogen nutrient surplus did not decrease; however, phosphate and potassium decreased by 21% and 13%, respectively, in 1999 compared with 1992. To reduce fertilizer utilization and to conserve environment, further reduction of fertilizer application is essential.
Keywords
Fertilizer utilization; Chemical fertilizer; Nutrient balance;
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  • Reference
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