毛豆是采收未成熟大豆嫩荚中的鲜豆粒。毛豆的品种较多,有生长期50～50天的特早熟品种,有生长期在90天以下的早熟品种,有生长期的90～120天的中熟品种和生长期在120～150天的晚熟品种。毛豆质量以晚熟品种最好,中熟品种次之,早熟品种最次。 由于晚熟品种生长期长,一些农民为了合理安排茬口, Soybeans is the harvest of immature soybean tender pods in fresh beans. Soybean varieties are more, with the growth of 50 to 50 days of special precocious varieties, growing season below 90 days in the precocious varieties, growing 90-120 days of maturing varieties and growing in the 120 to 150 days Late maturing varieties. The quality of green beans to the best late maturing varieties, followed by medium maturing varieties, the most precocious varieties. Due to the long maturity of late varieties, some farmers in order to arrange stubble,