我国人多地少,人均可耕地面积不足0.1ha,仅占世界平均水平的40％,因此挖掘土地资源潜力势在必行。在这方面,长期被人们忽略而未很好利用的田埂地坎便是一种有用的土地资源。黄土高原特别是黄土台塬阶地雨养农业区,为有效拦截天然降水和防止水土流失,兴修 With less people and less land, the per capita arable land is less than 0.1ha, accounting for only 40% of the world average. Therefore, it is imperative to tap the potential of land resources. In this respect, the ridge of ridge, which has long been overlooked but not well utilized, is a useful land resource. The Loess Plateau, especially the Loess Plateau rain-fed agricultural areas, in order to effectively intercept natural precipitation and prevent soil erosion, build