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城关公社南坡大队,1971年冬栽植苹果树17亩。从中选出11.9亩作试验园,其中国光品种6.54亩。株行距不等,平均每亩64株。试验园地势较平坦,土壤大部分为砂土,土层深厚,较肥沃,土壤含全氮0.0398％,速效磷10.6ppm,速效钾60.5ppm,pH为7.8,有灌溉条件。据费县气象资料记载,年平均温度13.4℃,无霜期197天,年降水量889毫米,集中于6月下旬至7月。国光密植园栽后3年见果,4年生平均亩产为420斤,5年生为1849斤,6年生为2689斤,7年生为7961.6斤,8年生为8435.2斤,1980年(9年生)平均亩产达11,972.6斤,
Chengguan commune south slope brigade, 1971 winter planting 17 acres of apple trees. Elect 11.9 acres for the test park, the Chinese light varieties 6.54 acres. Row spacing ranging from an average of 64 plants per acre. The test site has a relatively flat terrain. Most of the soil is sandy soil with deep and fertile soil. The soil contains 0.0398% of total nitrogen, 10.6ppm of available phosphorus, 60.5ppm of available potassium and pH 7.8. There are irrigation conditions. According to Fei County meteorological data records, the annual average temperature of 13.4 ℃, frost-free period 197 days, the annual rainfall of 889 mm, concentrated in late June to July. Light plantations in the country after 3 years see fruit, 4-year-old average yield of 420 pounds, 5-year-old was 1849 pounds, 6-year-old was 2689 pounds, 7-year-old was 7961.6 kg, 8-year-old was 8435.2 kg, 1980 Mu yield of 11,972.6 pounds,