在保持水土耕作中,用萝卜、油菜、羽衣甘蓝及芜菁甘蓝等十字花科作物作为饲料,已为人们所注目。美国农业研究站的一位农学家 GeraldA.Jung 在美国宾夕法尼亚大学牧草研究室开展了如何利用这些高产、优质、高消化率的作物来提高草地生产效益的研究。Jung 和昆虫学家 Robert A.Byers 以及宾夕法尼亚大学 Lynn D.Hoffman 在 In the conservation of water and soil farming, it has attracted people’s attention with cruciferous crops such as radish, rape, kale and rutabaga. Gerald A. Jung, an agronomist at the US Agricultural Research Station, conducted a study on how to use these high yield, high quality and high digestible crops to improve the productivity of grasslands at the Forage Research Office of the University of Pennsylvania. Jung and Entomologist Robert A. Byers and Lynn D. Hoffman of the University of Pennsylvania