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黄河中上游机械修梯田协作研究是1976年春开始的。参加这项试验研究的有山西、陕西、甘肃、内蒙,青海、宁夏六省(区)19个水土保持和农机科研单位。协作研究组的主要任务是:研究黄河中上游地区机械修梯田的规划、设计、施工技术和施工机械,总结推广机械修梯田经验,推动这一地区农田建设的开展。协作组内各
The middle and upper reaches of the Yellow River machinery repair terraces collaborative research began in the spring of 1976. Participate in this pilot study of Shanxi, Shaanxi, Gansu, Inner Mongolia, Qinghai, Ningxia six provinces (regions) 19 soil and water conservation and agricultural research units. The main tasks of the collaborative research group are: to study the planning, design, construction technology and construction machinery of mechanical terraces in the middle and upper reaches of the Yellow River, summarize and popularize the experience of mechanical terraced fields, and promote the construction of farmland in this area. Collaboration within the group