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一、目前玉米双交种生产上存在的问题晋南区推广玉米双交种已经六年,取得了显著成绩,但某些地区由于技术水平低,影响了制种质量,降低了增产效果。据1965年调查统计,全区因制种技术执行得不彻底,报废面积占繁殖、制种总面积的6.6％。造成报废的主要原因,是技术过得不硬。表现在:
I. Problems Existing in the Production of Double Crossbreds in Jinnan Now that the promotion of corn double crossbreds in Jinnan District has been accomplished for six years, remarkable achievements have been made. However, in some areas, the quality of seed production is affected and the yield-increasing effect is reduced due to the low technical level. According to the survey conducted in 1965, the region did not implement the technique of seed production thoroughly. The area of wasteland accounted for 6.6% of the total area for breeding and seed production. The main reason for scrapping is that technology is not hardworking. appears in: