洋芋退化问题,是我省洋芋生产上的突出问题。广大贫下中农和革命科技人员创造的掰杈扞插法,是防止洋芋退化的一种好方法。既防退化,又能增产。据我们试验,掰杈扞插的洋芋,有的单株可达二斤多。还节约大量种薯、扩大二季作的范围,提高洋芋种性。掰杈扞插,就是在春洋芋开花期,将洋芋植株中下部的分枝掰下来,另外栽上,就 The problem of potato degradation is a prominent issue in the production of potato in our province. The method of defending and inserting the vast majority of poor and middle peasants and revolutionary scientists and technicians has created a good way to prevent the deterioration of the potato industry. Both prevent degradation, but also increase production. According to our experiments, we can defeat the potato rooted in some branches and up to two kilos per plant. Also save a lot of seed, to expand the scope of two seasons to improve the variety of potato. Broke bough defend inserted, that is, in the spring potato flowering period, the lower part of the potato plants off the branches, the other planted on