论文部分内容阅读
1991年,云南省大理市种子公司组织实施的玉米矮化密植紧凑型高产栽培1.46亩示范田,选种的“掖单13
In 1991, Dali City, Yunnan Province, seed companies organized compact planting density of 1.46 acres of corn planting compact field, selection of "Yedan 13