我们公社位于旅大地区最北部的山区。无霜期160天左右。随着冬小麦面积的逐年扩大(1974年为3.425亩,平均亩产410.2斤),对下茬作物高产稳产和秋季腾地倒茬的要求极为迫切。几年来,我们从各地引进40多个早熟谷子品种,进行夏播试验。“北郊12号” Our commune is located in the northernmost mountainous region of Luda. Frost-free period of about 160 days. With the winter wheat area expanding year by year (3.425 mu in 1974, the average per-mu yield 410.2 kg), the demand for the stable and stable yielding of the next crop and the fall stubble in autumn is extremely urgent. In recent years, we have introduced more than 40 varieties of early-maturing millet from various places for summer sowing experiments. “North Suburb 12”