四川瘠薄土主要分布在丘陵区的丘顶和丘腰上部三台地,位置高、坡度陡、植被少、土壤容易随水流失,造成土薄、缺水、肥力低。这些土的小春历来以种植豌豆为主,它既是粮食又是自养的豆科作物,能使瘠薄土长期保持地力不衰。近年来,我们试种扁荚山黧豆,通过较系统的观察和分析,认为它是高产优质的豆类作物,种子含粗蛋白质26.9％,含淀粉率47％,出粉率38％,均高于豌豆,无豌豆象危害。加工成豆粉、粉条品质好。为了 The infertile soils in Sichuan are mainly distributed in the hilltops and the upper three parts of the hillside in the hilly areas. The locations are high, steep slopes and few vegetation. The soil is easily lost with water, resulting in thin soil, water shortage and low fertility. The spring of these soil is always dominated by the cultivation of peas. It is both a foodstuff and a self-supporting leguminous crop, which can make the infertile soil maintain its long-term fertility. In recent years, we planted flat pods mountain beans, through systematic observation and analysis, that it is a high yield and quality of beans, the seeds contain 26.9% of crude protein, starch rate of 47%, the output rate of 38%, both Higher than peas, peas without hazards. Processed into soy flour, vermicelli good quality. in order to