Land Use Forms supporting Sustainable Agriculture in Sloping Farmlands

从坡耕地农业可持续发展的角度出发，分析了坡耕地耕作措施、道路水路布置和Farmars养护措施对土壤侵蚀状况的影响。选择大面积单作种植萝卜的复垦旱地试验区，通过无线电遥控飞机读取航片上的土地利用形式和垄沟方向，调查了实际的沟耕措施和土壤侵蚀规律，弄清了泥沙来源，并向农民发出了养护措施调查问卷。研究结果如下：1.研究结果。通过对沟槽地貌特征的分析表明，沟槽倾向于沿农田边界形成较为平缓的方向，并在沟端造成土壤侵蚀。没有沟的裸地比有沟的裸地产生的泥沙要多得多。有效的土壤保持措施需要适当的农田安排和沿农田边界的草地水道，以回报许多农民的养护努力。农民对连作带来土壤侵蚀的无害化种植作业能力和排水系统有一定的重视。虽然轮作制度对土壤保持是必不可少的，但小农户的有利可图的经营需要维尔京土地。有效的基础设施改善了作物的可加工性和排水系统，并结合了保护措施，以进行可持续农业。

From the viewpoint of sustainable agriculture in sloping farmlands, we analyzed soil erosion conditions affected by the furrowing practices, the arrangement of roads and waterways and farmars' conservation practices. Selecting the test area composed of reclaimed upland fields which had been cropped with a Japanese radish in wide area by monoculture, we read the land use forms and the direction of ridges and furrows on air photos by radio controlled airplane and surveyed the actual furrowing practices and soil erosion patterns to make the sediment source clear, and sent out a questionaire to farmers on their conservation practices. The results obtained were as follows.1. Analysing the geomorphic features of furrowing practices showed that furrows tended to be formed in a more gentle direction along the field boundary and caused soil erosion at the furrow ends.2. Bare fields without furrows had yielded much more sediment than with furrows.3. Effective soil conservation practices need a suitable field arrangement and a grass waterway along the field border to recompense for many farmers' efforts to conserve.4. Farmers had partly paid attension to cropping workability and draining systems without injury by continuous cropping to bring soil erosion.5. Though a rotational cropping system was essential to soil conservation, vergin lands were required for the profitable operate of a small farmer.6. Effective infrastructures which improve cropping workability and drainage systems and the conservation practices are combined to conduct the sustainable agriculture.