在毛主席无产阶级革命路线指引下,在“农业学大寨”的群众运动中,为了解决近年来引黄灌区因小麦高产品种的迅速推广和密度提高,而导致以往小麦套种大豆面积和产量严重下降的生产关键技术问题,我们遵照毛主席“增加复种面积”的指示,于1972年小麦复种大豆引种试验获得成功,1973年进行生产鉴定,1974年大面积示范,至1975年在引黄灌区已推广种植近6万亩,占大豆播种面积的20％以上。其中以吴忠县发展最快,1975年小麦复种 Under the guidance of Chairman Mao’s proletarian revolutionary line and in the mass movement of “Learning from Dazhai in Agriculture”, in order to solve the problem of rapid popularization and increased density of high-yielding wheat varieties in the Yellow River irrigated areas in recent years, Decline in the production of key technical issues, we follow Chairman Mao “increase the area of ​​multiple cropping” instructions in 1972 wheat multiple cropping soybean introduction test was successful in 1973 for the production of identification, large-scale demonstration in 1974 to the Yellow River Irrigation in 1975 has been To promote planting nearly 6 acres, accounting for more than 20% of the sown area of ​​soybean. Among them, the fastest growing Wuzhong County, 1975 wheat multiple cropping