高密度早打顶是实现大面积高产稳产的有效途径保定地区十年来的棉花生产实践证明,凡是棉花能够大幅度增产的单位,都是在毛主席革命路线指引下,狠抓以密植为中心的技术改革取得的。如定兴县傅家庄大队,1964年大上密度,由每亩二、三千棵上到五、六千棵,使一千多亩棉花产量翻 High-density early-toping is an effective way to achieve large area, high and stable yield Cotton production practice in Baoding over the past 10 years shows that all units that can greatly increase cotton production are guided by Chairman Mao’s revolutionary line and are focused on planting densely Technology reform achieved. Such as Dingxing County Fujiazhuang brigade, large density in 1964, from two thousand three thousand to fifty thousand, six thousand, so that more than one thousand acres of cotton output turned