耕耘方法의 差異가 土壤의 物理的特性과 水稻生育에 미치는 影響을 究明하기 爲하여 微砂埴壤質畓에서 耕耘機耕耘, 無耕耘, 로타리, 深耕, 深土破碎 및 치슬프라우 等 6個의 相異한 耕耘條件下에서 水稻를 栽培하였다. 1. 作業能率은 치슬프라우가 600a/hr로 가장 높았으며 트랙터深耕$gt;深土破碎$gt;로타리$gt;耕耘機耕耘의 順序로 낮아졌다. 2. 物理性改善 效果는 土深 20㎝까지는 트랙터 深耕과 치슬프라우가 良好하였으며, 20㎝以下 깊이에서는 深土破碎가 效果的이었다. 3. 水稻收量은 耕耘機耕耘에 比하여 로타리區 4% 無耕耘區는 11% 減收되었고, 深耕區는 5%, 深土破碎 4%, 치슬프라우는 3% 增收되었으며 作業能率과 收量面에서 綜合 考察해보면 深耕區가 合理的인 耕耘方法으로 判斷된다.

A field experiment was conducted to find out the effects of tillage methods on the changes of soil physical properties and rice yields. Silty clay loam soil was treated with six kinds of different tillage methods, cultivator plow-rotary, rotary, tractor deep plow-rotary, subsoiling-rotary, chisel plow-rotary and no-tillage, and Jinju variety of rice was cultivated. The results were summarized as follows; 1. Working efficiency was highest at chisel plow and the efficiencies were decreased with the order of deep plow, subsoiling, rotary, and cultivator plow. 2. Deep plow and chisel plow were considered as the useful treatments of physical properties to 20 ㎝ depth soil and subsoiling was effective to 40 ㎝ depth soil. 3. Rice yields were decreased 4% by rotary and 11% by no-tillage compare to cultivator plow-rotary but the yields were increased 5% by deep plow, 4% by subsoiling and 3% by chisel plow. As the results of all the data, welting efficiency, soil physical properties and rice yields, tractor deep plow was recommendable tillage method for rice paddy soils