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太岳山林局七里峪林场的工人、干部、技术人员积极响应毛主席“绿化祖国”的伟大号召,发扬敢想敢干的革命精神,进行落叶松窄沟育苗试验,取得了一定效果。七一年育落叶松苗36·4亩,当年平均亩产苗量16万余株,现在每亩保留四年生苗6万余株,苗木根系大多在20厘米左右。落叶松窄沟育苗必须认真选择圃地。根据落叶松的生物学特性和当地的气候土壤条件,圃地应选在海拔2000米以上的西北向或北向荒坡,坡度15—20°;土壤以
Workers, cadres and technicians from Qiliyu Forest Farm in Forest Bureau of Taiyue Mountain responded positively to Chairman Mao’s great call for “greening the motherland,” carried forward the revolutionary spirit of daring to dare, and carried out experiments on the narrow-gap seedling nursery of Larch. Some achievements were achieved. Seventy-year planted Ye Song Miao 36.4 mu, average annual mu production of more than 160,000 strains, and now retain four years per mu acres of more than 6 strains of seedlings, mostly in about 20 cm roots. Larch narrow ditch seedlings must carefully choose nursery. According to the biological characteristics of larch and the local climate and soil conditions, garden should be selected at an altitude of 2000 meters above the northwest or northwest slopes, slope 15-20 °; soil to