草田轮作是利用牧草和农作物进行轮种的一种耕作制度。这种耕作制度,在黄土丘陵沟壑区推行,具有广泛的现实意义。它的好处是:改良土壤,保持水土,增加产量,解决三料,能合理利用水土资源,发挥耕地多的优越性。因为黄土丘陵沟壑区,大部为黄土覆盖,由于黄土土质疏松,加之丘陵起 Grassland rotation is the use of pasture and crop rotation of a farming system. This farming system, implemented in the loess hill and gully area, has a wide range of practical significance. Its benefits are: improving the soil, maintaining soil and water, increasing output, solving three problems, making rational use of water and soil resources and giving play to the advantages of arable land. Because of loess hilly and gully areas, most of the loess cover, loess due to loose soil, combined with hilly