为了提高种子质量,促进农业增产,我省引进了复式和重力式种子精选机进行重点试验推广,取得了显著的增产效果。种子精选机的引进和推广种子精选加工机械在我省基本上是空白,只是个别大型国营农场、农业院校和科研单位使用,在种子部门没有推广。我省于1979年夏季开始引进仿制国外的种子精选机,在长葛、临颍等县进行重点试验。由于种子经过精选后,净度、千粒重、容 In order to improve the seed quality and promote agricultural production, our province introduced a double-gravity and gravity-type seed sorting machine to promote key experiments and achieved significant yield-increasing effect. The introduction and promotion of seed selection machine Selective processing of seed machinery in our province is basically blank, but only a few large state-owned farms, agricultural colleges and research institutes to use, there is no promotion in the seed sector. In the summer of 1979, our province started to introduce imitation seed selection machines from abroad and conducted key experiments in Changge and Linying counties. As the seed after selection, clarity, weight, weight