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根据一些社队采用提前起垅的方法使大面积春植甘薯每亩增产300—500斤的经验,1977年全县有7个公社9处进行了这项试验。其结果是:4月18日前后起垄栽植春甘薯的,比5月10日随起垅随插苗的(对照),每亩增产鲜甘薯196—815斤,平均增产353斤;4月28日前后起垅栽植的,比对照每亩增产鲜甘薯146.7—447斤,平均增产256斤。他们的做法主要是:一、栽春甘薯的地块,首先深耕深刨8寸以上,然后按甘薯垅的大小和方向串沟,把土杂肥或氨水集中施在垅沟内,再扶垅。起垅的时间越早越好,最好在顶凌整地时
According to some communes and brigades, the method of increasing the output of large-area spring sweet potatoes by 300-500 jin per acre was adopted in advance. In 1977, there were 9 communes in 7 communes in the county. The results are: April 18 ridge planting spring sweet potato, than May 10 with the raccoon seedlings (control), 196 acres of sweet potato yield 196-815 pounds, an average increase of 353 pounds; April 28 Planting day and night, than the control of fresh sweet potato yield per acre 146.7-447 kg, an average yield of 256 pounds. Their approach is mainly: First, the planting of sweet potato plots, first deep plowing 8 inches deeper, and then according to the size and direction of sweet potato 串 string ditches, the Tuza Fei or ammonia concentrated in the ditch ditch, then Fu 垅. As soon as possible, the sooner the better, the best when the top Ling preparation