화강암 적황색토양의 신개간지에서 청예사료작물 (靑刈飼料作物) 재배 및 이용에 관한 연구 Ⅰ. 가축퇴비 시용에 따른 토양의 물리적 특성 변화와 작물육성 = Studies on Production and Utilization of Forage Crops in Newly Reclaimed Red - Yellow Soils Derived from Granite Ⅰ. Effect of cattle compost application on soil physical properties and crop performance

다국어 초록 (Multilingual Abstract)

A three year`s field experiment was conducted on newly reclaimed hilly land to evaluate the effect of cattle compost application on the changes of soil physical properties and their relationship to crop performance. Maize as summer crop and rye as winter crop were grown on Songjeong loam, 7-10% slope, during 19 85 to 1987. Soil physical properties, such as formation of granular structure and water holding capacity were increased, but soil hardness and soil bulk density in the root zone were reduced markedly by cattle compost application. Under compost application the rate of solid phase was decreased, but the rate of liquid phase and air phase were increased comparatively, and it resulted in a great increase of plant growth and the rate of dry matter accumulation. A positive relationship was observed between three phase composition, solid, liquid and air phase, in the subsoils and crop performance both in maize and rye cultivation.