我们生产队栽种“德友三号”土豆已有八年十五熟。实践证明它是一个品质好、抗性强、退化轻、省肥、耐贮藏、稳产高产,适应春秋两季栽培的中晚熟品种。一九六八年以来,每年平均春播面积43亩,亩产平均25.76担,最高的32.92担,种子自给有余。但是,几年来的土豆生产也不是一帆风顺的,经历了高产一低产一更高产的过程。一九七一年41.5亩由于没有施基肥,茬口紧,播种期推迟,边坌地,边排薯,泥块粗,土地没有风化,土豆亩产只有17.07担。七 Our production team planted “Deyou No. 3” potatoes have been cooked fifteen years eight years. Practice has proved that it is a good quality, strong resistance, light degradation, fertilizer, storage resistance, stable and high yield, adapted to the cultivation of spring and autumn in the late maturing varieties. Since 1968, the average annual spring sown area of ​​43 mu, average per mu yield of 25.76, the highest 32.92, the seeds self-sufficiency. However, the potato production over the past few years has not been easy and has gone through the process of high yield, low yield and higher yield. In 1971, 41.5 mu of land was not weathered due to the lack of base fertilizer, crop tightness and delayed sowing. Seven