In this study, rye, Hairy beaches, pastures long and weighing many organic grazing cover crops can repress the uniforms, and the tractor was designed and built for mounting repression device. And identify appropriate working conditions and job factors and job performance by analyzing the correlation between the test results are as follows. Level 40∼50HP tractor for applying cover crops repression device width 2,400㎜, battling roller diameter is 380㎜, battling back after work uniforms repress blade for 4×100㎜, 640㎏ gross weight was optimized. Optimization of field test the tractor speed shift 1(0.45㎧∼0.53㎧) and in the repression and crop height 40∼ 60㎜ uniforms, respectively. Appropriate working conditions identified by weight in the roller by type by speed test results, the weight is heavy, long repression and squeezed me, speed was increased, the lower the efficiency of repression.

In organic farming agriculture, integration of cover crop into cropping system is recommended to improve the soil quality, prevent soil erosion, and control weeds. The aim of this study was to control weeds in soybean fields by integration of cover crops such as hairy vetch and rye. Due 10 cover crop mulching, weeds occurrence and growth were radically decreased. One month later after transplanting, weed growth inhibition rate of hairy vetch and rye treatment were 98% and 89% respectively, while crimson clover treatment were 50%. These effects last long over two month. The soybean yield of hairy vetch treatment was best. Therefore using hairy vetch as cover crop was highly recommended in organic soybean field.