습답수작기술향상에 관한 연구 -제1보 지하배수가 시비량과 재식밀도를 달리한 수도의 생육 및 수량에 미치는 영향

In order to clarify the effect of underchannel drainage and culture on the ill-drainage paddy fields, the experiment was carried out at different amounts of fertilizer and planting space under the culvert. It had been found that the effect of underchannel drainage on the ill-drainage paddy field was very efficacious, and planting density was more effective on yield than the amount of fertilizer applied.