Status and Changes in Chemical Properties of Paddy Soil in Korea
2012
Kang, S.S., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Roh, A.S., Gyeonggido Agricultural Research and Extension Services, Hwasung, Republic of Korea | Choi, S.C., Gangwondo Agricultural Research and Extension Services, Chuncheon, Republic of Korea | Kim, Y.S., Chungbuk Agricultural Research and Extension Services, Cheongwon, Republic of Korea | Kim, H.J., Chungbuk Agricultural Research and Extension Services, Cheongwon, Republic of Korea | Choi, M.T., Chungnam Agricultural Research and Extension Services, Yesan, Republic of Korea | Ahn, B.K., Jeollabukdo Agricultural Research and Extension Services, Iksan, Republic of Korea | Kim, H.W., Jeollanamdo Agricultural Research and Extension Service, Naju, Republic of Korea | Kim, H.K., Jeollanamdo Agricultural Research and Extension Service, Naju, Republic of Korea | Park, J.H., Gyeongsangbukdo Agricultural Research and Extension Service, Daegu, Republic of Korea | Lee, Y.H., Gyeongsangnamdo Agricultural Research and Extension Services, Jinju, Republic of Korea | Yang, S.H., Jeju Agricultural Research and Extension Services, Jeju, Republic of Korea | Ryu, J.S., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea | Jang, Y.S., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Kim, M.S., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Sonn, Y.K., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Lee, C.H., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Ha, S.G., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Lee, D.B., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Kim, Y.H., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea
Soil chemical properties of agricultural soils in Korea were investigated at four-years interval in order of paddy, plastic film house, upland, and orchard soils since 1999. Paddy soil samples were taken from the surface 15 cm at 4,047, 2,010, 2,110 and 2,110 sites in all provinces of South Korea in 1999, 2003, 2007 and 2010, respectively. Soil chemical properties in Korea except Jeju province were measured. Soil pH and exchangeable calcium and available silicate contents increased with increasing the application rate of silicate fertilizer and with decreasing its application interval. Soil organic matter content also increased from 22.0 g kg-¹ in 1999 to 26.0 g kg-¹ in 2011. Average concentration of available phosphate in 2011 was higher than the upper limit of its optimal range for rice cultivation. However, exchangeable magnesium and available silicate contents were below the lower limit of their optimal ranges, which were 80% and 92% of them, respectively.
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