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坡改梯作为一项治理水土流失，改善农业基本生产条件的主要工程措施，在黄土高原丘陵沟壑区广泛开展，并取得了显著成效。据统计，截止1996年固原地区累计完成坡改梯面积330万亩。按此推算梯田地埂斜坡面积约有66－99万亩，对这样大面积的土地资源，如何进行科学有效的治理，加
As a major engineering measure to control soil and water loss and improve the basic production conditions in agriculture, slope alteration ladder has been widely carried out in the hilly and gully regions of the Loess Plateau and has achieved remarkable results. According to statistics, by the end of 1996, a total area of 3.3 million mu of slope alteration ladder has been completed in Guyuan. Click here to calculate terraces 埂 slope area of about 66-99 acres, such a large area of land resources, how to carry out scientific and effective governance, plus