陕北丘陵沟壑区,山高沟深、地形很陡,农耕地绝大部分分布在陡坡上。以前所修水平梯田,一般只适于牲畜耕作,宽度只4—5米。近年来,随着机械耕作和机修梯田的发展,梯田的宽度增加到八、九米,十几米,甚至几十米,群众称之为宽条梯田。由于田面增宽,埂坎的高度,也由原来的二米左右增加到四、五米,甚至七、八米。为了防治因埂坎高而引起的滑塌,采用了复式埂坎,即挖方处土硬埂坎陡,填方处土松埂坎缓。因此群众又称它为复式梗梯田,其断面(见图1)。 Hilly and gully areas in northern Shaanxi, Gaogou deep, terrain is very steep, most of the distribution of farmland on the steep slopes. The terraces that have been previously repaired are generally only suitable for livestock farming, with a width of only 4-5 meters. In recent years, with the development of mechanical farming and mechanical terraces, the width of terraces has been increased to eight, nine meters, ten meters or even tens of meters, and the masses call them broad terraces. Due to the widening of the field, the height of the ridge is also increased from the original two meters to four or five meters or even seven or eight meters. In order to prevent and control the slump caused by the high ridge, the double ridge is adopted, that is, the soil at the excavation site is steep and the soil ridge at the filling place is slow. Therefore, the masses also call it a compound terraces terraces, the section (see Figure 1).