韩城县芝川公社科研站遵照毛主席“推广优良品种.有了优良品种,即不增加劳动力、肥料,也可获得较多的收成”的教导,选育出“韩芝621”早熟棉花品种.该品种的特点是:早熟、结蕾性强、果枝特短、桃园而小,茎秆细、根系弱.根据它的特点,适于密植,于1973年作了三种不同密度试验,结果:每亩一万株,亩产皮棉143.5斤,一万五千株亩产皮棉137.2斤,二万株亩产皮棉150.9斤.经检验,绒长29毫米至32.82毫米,纤维成熟度 Hancheng Shibakawa commune research station in accordance with Chairman Mao “With excellent varieties, that is, without increasing labor, fertilizer, but also get more harvest ” teaching, breeding "Han Zhi 621 Precocious cotton varieties. The varieties are characterized by: early maturity, strong budding, fruit branches and short, small Taoyuan, stems thin, weak roots. According to its characteristics, suitable for close planting, in 1973 made three different densities Test, the results: 10,000 per mu, per mu of lint 143.5 kg, 15,000 mu of lint 137.2 kg, 20,000 mu of lint 150.9 kg. After testing, velvet length 29 mm to 32.82 mm, fiber maturity