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为验证通丰养分平衡剂在玉米生产中的施用效果,评价其肥效,为推广应用提供科学依据,我站于2008年7月20日至2008年9月20日在郸城县城郊乡史洼行政村张金钢责任田内实施了玉
In order to verify the application effect of TongFeng nutrient balancing agent in corn production, evaluate its fertilizer efficiency and provide scientific basis for its popularization and application, I stood in the history depression of Chengxiang suburb in Dancheng county from July 20, 2008 to September 20, 2008 Zhang Jin Gang administrative village responsibility Tian implemented jade