莎车县一公社二十一大队是我司的良种基地,一九七三年粮食亩产六百四十八斤,到一九七七年亩产提高到八百零四斤。在生产水平较高的情况下,亩产能否继续提高呢?成为大家关注的问题。我们全面分析研究了该大队的生产条件,认为这个大队人多地少,复种指数高,如何既能延长玉米的生育期,保证复播玉米正常成熟,又能适时播种冬麦,是该大队当 Twenty-first Battalion, a commune of Shache County, is the base of good seed of our company. In 1973, the output of grain per mu was 640 kilograms. By 1977, the yield per mu was increased to 840 kilograms. In the case of higher production levels, whether the mu production can continue to increase? It becomes a matter of concern to all. We comprehensively analyzed and studied the production conditions of this brigade and considered that this brigade is less crowded and has a higher multiple cropping index. How to prolong the growth period of corn, ensure the normal maturity of corn replanting, and timely sowing winter wheat?