山丹县种植的豆类作物主要有蚕豆和豌豆;绿肥作物主要有苜蓿、草木樨、箭舌豌豆和毛苕子。其种植情况大体是: 蚕豆,五十年代几乎不种,六十年代初开始种植,1976年种植面积曾发展到近万亩,占全县总播种面积的2.5％;此后,逐年减少,1981年全县仅种植660余亩,尚不到总播面积的0.2％。豌豆,五十年代至七十年代初期一直是逐年扩大种植的趋势,其中1965—1970年的六年 Soybean cultivation of legumes are mainly beans and peas; green manure crops are mainly alfalfa, herbs, arrow tongue peas and hair raccoon. The planting situation is broadly speaking: broad beans, which were hardly planted in the 1950s and planted in the early 1960s. The area planted in 1976 had grown to nearly 10,000 mu, accounting for 2.5% of the total planted area of ​​the county; and since then, it has been decreasing year by year. The county only planting more than 660 acres, less than 0.2% of the total sowing area. Peas, from the 1950s to the early 1970s, have been a growing trend year by year, with six years from 1965 to 1970