在北方的广大地区,农民繁殖白菜籽一般均采用清种的方法。为了充分利用有限的土地,增加单位面积效益,我地区繁殖白菜籽的农民多数采取在玉米地间套种小株白菜采种的种植形式。经多年来的生产实践证明这种种植形式其产值可比清种玉米高出3倍以上。1988年,我们对12户农民的76亩地 In the vast northern areas, farmers breeding cabbage generally adopt the method of clearing up. In order to make full use of limited land and increase unit area benefit, most of the farmers who breed cabbage in our region adopt the planting mode of planting small cabbage in the corn field. After many years of production practice has proved that this form of cultivation of its output than the clear corn more than 3 times. In 1988, we had 76 mu of land for 12 peasants