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許奉九,廬泳德 경희대학교 부설 식량자원개발연구소 1989 硏究論文集 Vol.10 No.-
To establish the optimum ranges of soil properties for corn growth, this study was carried out. Corn growth was investigated and soil environmental and physico-chemical properties were surveyed and analyzed at 127 farmer's field from 1983 to 1984. The mean values of plowing layer, root zone and bulk density were 10cm, 21.4cm and 1.20g/cm^(3), respectively. pH and organic matter were 5.2 and 2.8%, but those values were below the optimum level. Optimum ranges of three phases were below 55% in solid, above 20% in liquid and above 15% in air phase. The limiting ranges of soil physical properties for corn cultivation were below 10cm of plowing layer, above 20% in liquid and above 15% in air phase. The limiting ranges of soil physical properties for corn cultivation were below l0cm of plowing layer, above 18.4cm of soil hardness and 1.30g/cm^(3) of bulk density. Corn growth was correlated highly with environmental and physical properties of soil. The limiting factors in corn field were appeared in order of gravel content >available soil depth >slope >plowing layer >bulk density = porosity >soil hardness.