我县1979年从四川引进苹果乔砧矮化密植(简称乔砧密植)技术。当年在关庙龙泉、城关双桥、东风五队和六队等十几个果园(场)进行试种,亩栽600—1,000株,共计面积18.5亩。五年来的栽培情况是头年栽树,第二年丰产,第三年高产,第四年亩产最高达到万斤以上。今年(1983),在受大灾的情况下,亩产仍达3,500斤以 I County in 1979 from Sichuan introduced apple an dwarf close planting (referred to as Joe anvil close planting) technology. In that year, Guanquan Longquan, Chengguan Shuangqiao, Dongfeng 5th Team and Six Team of more than a dozen orchards (field) for trial planting, planted 600-1,000 mu, a total area of ​​18.5 acres. Cultivation in the past five years is the first year of planting trees, the second year of high yield, the third year of high yield, the fourth year of mu produce up to 10000 pounds or more. This year (1983), in the wake of the disaster, it still amounted to 3,500 pounds per mu