栖霞县观里公社小观大队的630亩老梨园,继连续多年丰收,1975年刷新了高产记录,总产466万斤,平均亩产达7397斤。 为了研究解决老梨树的高产规律和措施,这个大队的果园科技组,在1958年大跃 进高潮中,就建起了15.28亩的丰产试验园。1971～1975年连续五年记载了园内各单株的产量,统 The 630-mu-old Liyuan, a small-sized brigade of the Guanli Commune in Qixia County, has enjoyed a bumper harvest for many years in a row. In 1975, it recorded a record high-yielding output with a total output of 4.66 million kilograms and an average yield of 7397 kilograms. In order to study and solve the problem of the high-yielding law and measures of the old pear tree, the orchard science and technology group of this brigade built 15.28 mu of high yield test garden at the climax of the Great Leap Forward in 1958. 1971 ~ 1975 for five consecutive years recorded the park’s individual plant output, system