一、概况春玉米套种秋黄豆是天等县人民群众通过长期生产实践而总结出来的一套耕作制度,解放前后,旱作地区普遍采用。 1952—1955四年间,春玉米套种秋黄豆,平均每年约7万余亩,占春玉米面积33.3％,其中最多的1952年达9.7万亩,占春玉米面积38.3％。四年平均,春玉米亩产 First, an overview Spring corn intercropping autumn soybean is Tianxian County people through long-term production practices summed up a set of farming system, before and after liberation, dry areas are widely used. In 1952-1955, the spring corn intercropped with autumn yellow beans averaged about 70,000 mu every year for four years, accounting for 33.3% of the spring maize area. Among them, the largest one was 97,000 mu in 1952, accounting for 38.3% of the spring maize area. Four-year average, spring corn mu produce