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- 저자 : 金式成 (검색결과 1 건)
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許奉九,金式成 경희대학교 부설 식량자원개발연구소 1992 硏究論文集 Vol.13 No.-
This study was conducted to evaluate the mean values and relationships of physico-chemical properties of Korean paddy soil by different textural classes and soil depths and to serve the basic information to improve the soil properties. The 13 physico-chemical properties of six soil families, by the results of detailed soil survey, were collected from 151 series of paddy soil. The representative values and the distributed area by weighted mean values with grouping of textural classes and the relationships among the soil physico-chemical properties and useful regression equations were investigated by computer analysis. Soil pH and organic matter of coarse loamy at the topsoil were 7.2, 1.2% respectively. Those of subsoil were similar to the topsoil. Base saturation was increased by soil pH increase except the topsoil of fine clayey and the subsoil of fine silty. Multiple regression equations which can be calculate the cation exchange capacity from clay and organic matter contents were found out. Cation exchange capacity of clay in the topsoil at coarse loamy and fine loamy were 0.35, 0.32me/ 100g respectively. That of fine silty was lower than the others. Moisture retentions were highly significant to the clay and organic matter contents. The multiple regression equations which can be calculate those from sand, silt and clay contents were evaluated.
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