본 실험은 한국 토질의 대부분을 점령하고 있는 화강암, 결정편암, 화강편마암에서 유도된 소나무 및 오리나무군락의 임지와 나지의 여러 토층으로부터 채취한 토ulcorner의 화학성분을 서로 분석 비교하였다. 토층의 발달정도는 각 토질의 형성에 따라 약간의 차이가 있고 화강편마암의 유도 토양이 수분함량, 유효질소, 치환능등을 많이 보이고 가장 풍화되었다. 유기물과 유효린산의 많은 함량은 화강암의 유도 토암에서 발견되었고 이들은 서로 밀접한 관계를 나타냈다. 또한 이 토양이 가장 높은 산성을 보였다. 결정편암에서 유도된 토양은 초산능질소의 함량이 가장 많으며 ulcorner환능이 가장 적었다. 세 모암의 화학성분사이에 유의ulcorner가 소나무 군락에서는 유효린산, 질소, 수분함량, 유기물 함량등에서 오리나무군락에서는 질소, 직환능, pH등에서, 나지에서는 유효린산, 질소
In this experiment, the chemical components of the soils were collected from different horizons in some forest soils and naked soils developed on granite, crystalline schist, and granite gneiss were analized to be compared with each other. The developed degree of the surface soils showed some difference according to the differnt geological formation. The soil derived from granite gneiss was showed to have more water content, available nitrogen, exchange properties and weathered most. Much quantity of the organic matter, and of the available phosphorus was discovered in the soil derived from granite and found closely related to each other. The soil derived from the parent rock of granite showed highest acidity. The soil derived on crystalline schist was found to have the maximum quantity of the nitrate nitrogen and the least of the exchange properteis. The only significant difference among the chemical properties of the three parent rock seems to be in the contents of the available phosphorus, nitrogen, water content, and organic matter in the Pinetum densiflorae, of the nitrogen, exchange properties, and pH in the Alnusetum japonicae, of the available phosphorus, nitrogen, total exchangeable base, and base saturation in the naked area, and of the nitrogen, base exchange capacity, and pH in all forest soils. The degree of the distribution of the nutrient in soil was found decreasing going from the surface soil down to the subsoil.
