沓 利用度 提高를 爲한 調査 硏究 = Investigation on the Efficient Utilization of Paddies in Korea

다국어 초록 (Multilingual Abstract)

To obtain the informations on the checking factors of the effecient utilization of paddies in chungnam province and study on the effecient working system and high productive cropping system in paddies, the utilization state of paddies including environmental conditions were investigated at sample 1,500 farms. The results obtained are summarized as follows;
1. The difficulty of drainage in paddies was the most important factor checking the utility of paddies. Delayed transplanting of rice and lack of labour were also important checking factors on the efficient utilization of paddies.
2. The utilization of paddies was rather effecient at small size farms of which farmers were almost poor, and most of them cultivated barley for their own food.
3. Considering climatic conditions, pre-crops of rice must be harvested before June 10 th, and the marginal transplanting date of rice plant is June 25 th.
4. In case of planting barley as a post-crop after rice, the spread seeding by rotary before plowing was most efficient with lowest cost.
5. Considering rice cultivation, yield of barley and net income, the most efficient cropping system was "Josaengtongil+Olbori".