我省黑龙港流域,土地辽阔,人少地多,每人平均占有耕地3—6亩,多的10余亩。据调查,当地农牧结合较好的社队,过去都十分重视种植苜蓿,一般占耕地5—10％,有的达15％。种植形式,多采用小麦或玉米和苜蓿轮作。通过轮作,对提高土壤肥力,增加粮、棉产量,实现以农养牧,以牧促农起到了良好作 Heilongjiang River Basin in our province, the vast land, less people and more land, each occupying an average of 3-6 acres of arable land, more than 10 acres. According to the survey, local farming and animal husbandry combined with better communes and brigades and teams have all along placed great emphasis on planting alfalfa, which generally accounts for 5-10% of the cultivated land and some 15%. Planting forms, mostly using wheat or corn and alfalfa rotation. Through rotation, to improve soil fertility, increase grain and cotton production, to achieve agriculture and animal husbandry, agriculture and animal husbandry played a good job