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掖单１３号夏播制种高产技术山东省滨州地区种子公司吴安民，孙光荣山东省惠民县种子公司杜振桐，姚光福紧凑型玉米杂交种掖单１３号丰产性能好，但制种产量低而不稳。１９９３年惠民县李在乡３３．３公顷掖单１３号制种田，其中有３户农民合计０．８３公顷折合每公顷产７...
Yedang No. 13 Summer sowing high-yielding seed production technology company in Shandong Province Binzhou seed companies Wu Anmin, Sun Guangrong Huimin County, Shandong Province seed companies Du Zhentong, Yao Guangfu compact Yedang hybrid corn variety No. 13 good yield, but low seed production Unstable In 1993, Li County, Huimin County, 33.3 hectares of Yedang No. 13 farming system, of which three farmers total 0.83 hectare yield equivalent to 7 per hectare ...