Comparison of Farm Based Fertilizer Usage in 1992 and 1999
2003
Kim, S.C. | Park, Y.H. | Lee, Y. | Lee, J.Y. (RDA, Suwon, Republic of Korea) | Kim, C.S. (Chungnam National University, Daejeon) | Kim, P.J. (Gyeongsang National University, Chinju, Republic of Korea)
Korea is one of those countries that have very high usage rates of chemical fertilizer 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.
Mostrar más [+] Menos [-]Palabras clave de AGROVOC
Información bibliográfica
Este registro bibliográfico ha sido proporcionado por Korea Agricultural Science Digital Library