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我县大豆从播期上可分为春大豆、夏大豆和秋大豆三类。1977年以前,只种夏大豆和秋大豆。如1976年全县大豆面积10.25万亩中,夏大豆8.75万亩,占85.4％,秋大豆1.5万亩,占14.6％。1977年后随着耕作制度的改革,开始试种推广了春大豆。1978年春大豆种植面积0.7万亩;1979年扩大到1.9万亩,占全县大豆种植面积的14％;1981年至今,春大豆逐步取代了秋大豆而发展到3万亩左右,占全县大豆种植面积的36.1％。从单产上看,春大豆一般平均亩产都在340
My county soybean from the sowing date can be divided into spring soybean, summer soybean and autumn soybean three categories. Before 1977, only summer soybean and autumn soybean. For example, in 1976, the area of 102,500 hectares of soybean in the county, 87,500 acres of summer soybean, accounting for 85.4%, 15,000 acres of autumn soybean, accounting for 14.6%. After 1977, with the reform of farming system, began to test and promote spring soybeans. Spring 1978 soybean acreage of 0.7 hectares; 1979 expanded to 1.9 hectares, accounting for 14% of the county soybean acreage; since 1981, the gradual replacement of spring soybeans and the development of about 30,000 acres of soybean, accounting for the county soybean 36.1% of the area planted. From the yield point of view, the average yield of spring soybeans are at 340