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镇安县地处秦岭南麓,总土地面积3477平方公里,现有耕地31.6万亩,基本农田16.5万亩,人均0.64亩。镇安县山大沟深,降雨集中,暴雨强度大,水土流失比较严重。长期以来,山区人民刀耕火种,广种薄收,年复一年的毁林开荒,导致越穷越开,越开越穷的恶性循环,粮食产量低而不稳,农业生产长期处于落后状态。解放后,山区人民向穷山恶水开战,治山治水。1965年来全县人民开展以兴修土坎水平梯田和坡式梯田为主的农田基本建设取得一定成绩,但是由于土石山区土质疏松,兴修的土坎梯田,不能长久。1970年后,镇安县人民总结了正反两方面的经验,就地取材用石垒坎,开
Zhen’an County is located in the south of the Qinling Mountains, with a total land area of 3,477 square kilometers. It has a land area of 316,000 mu, a basic farmland of 165,000 mu and a per capita population of 0.64 mu. Zhenan County Dagou deep, concentrated rainfall, heavy rainfall intensity, soil erosion is more serious. For a long period of time, the people in the mountainous areas have been slash-and-burn their flats, extensive planting and thinning, year after year of deforestation, resulting in a vicious cycle of poorer and poorer conditions, low and unstable grain output and long-term backward agricultural production. After the liberation, people in mountainous areas started wars in the poor mountains and rivers, and treated mountains and rivers. In 1965, the people of the whole county have made some achievements in the farmland capital construction mainly for the cultivation of horizontal ridge terraces and slope terraces. However, due to the loose soil and mountainous terraces, the terrace can not last long. After 1970, the people of Zhen’an County summed up both positive and negative experiences, using locally available stone basins and opening