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Monitoring of Chemical Properties from Paddy Soil in Gyeongnam Province  

Lee, Young-Han (Gyeongsangnam-do Agricultural Research and Extension Services)
Lee, Seong-Tae (Gyeongsangnam-do Agricultural Research and Extension Services)
Heo, Jae-Young (Gyeongsangnam-do Agricultural Research and Extension Services)
Kim, Min-Geun (Gyeongsangnam-do Agricultural Research and Extension Services)
Hong, Kang-Pyo (Gyeongsangnam-do Agricultural Research and Extension Services)
Song, Won-Doo (Gyeongsangnam-do Agricultural Research and Extension Services)
Rho, Chi-Woong (Gyeongsangnam-do Agricultural Research and Extension Services)
Lee, Jin-Ho (Department of Bioenvironmental Chemistry, College of Agricultural and Life Sciences, Chonbuk National University)
Jeon, Weon-Tai (National Institude of Crop Science, RDA)
Ko, Byong-Gu (National Academy of Agricultural Science, RDA)
Roh, Kee-An (National Academy of Agricultural Science, RDA)
Ha, Sang-Keun (National Academy of Agricultural Science, RDA)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.43, no.2, 2010 , pp. 140-146 More about this Journal
Abstract
Monitoring of the dynamic changes at paddy rice agriculture is very important for agricultural sustainability. Field monitoring was performed to evaluate the soil chemical properties of 260 paddy soil samples every four years from 1999 to 2007 in Gyeongnam Province. Soil chemical properties such as pH, organic matter, available phosphate, silicate, exchangeable potassium, calcium, and magnesium contents were analyzed. The contents of exchangeable cations, and available silicate were significantly increased in 2007 compared to 1999. The chemical contents of organic matter, exchangeable potassium, and magnesium were significantly increased in acid sulfate soil, and silty clay loam compared to those of other soil types, and textures. Especially, content of organic matter was significantly increased in hill area compared to other soil topographies, while exchangeable potassium was significantly decreased. Principle component analysis (PCA) of chemical properties in paddy soils was obtained with eigenvalues > 1 summing 39.1%of variance for PC1, 20.4%of variance for PC2, and 59.5%of the total variance in the all of soil chemical properties. Therefore, principal component analysis is more effective for monitoring from chemical properties of paddy soil.
Keywords
Paddy soil; Chemical property; Monitoring; Soil texture; Soil type; Topography;
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