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据农业部“丰收计划”办公室介绍,由吉林省四平市农科院培育成的中熟玉米单交种“四单19号”,增产效益显著,去年在全国种植面积已达1000万亩以上。农业部建议各地推广种植这一优良品种。于1996年
According to the Ministry of Agriculture “harvest plan” office introduced by the Siping City, Jilin Province Academy of Agricultural Sciences cultivated into a single medium-maturity corn single “Sidan 19”, yield significant benefits last year in the country planted area has reached 10 million mu more. The Ministry of Agriculture recommends popularizing this fine variety throughout. In 1996