论文部分内容阅读
春玉米亩产750公斤优化配套栽培技术,是我所从1990年起经过三年的调查、试验和生产验证而总结出的一套符合当地生产实际的栽培技术,并于1992年9月通过了省内外专家的鉴定。张家口坝下地区是我省的春玉米高产区。近年
Spring corn yield 750 kilograms per acre cultivation techniques, is my set from 1990 after three years of investigation, testing and production verification summed up a set of consistent with the local production of practical cultivation techniques, and in September 1992 adopted Appraisal of experts inside and outside the province. Zhangjiakou dam area is the province’s spring corn high-yield area. in recent years