【摘要】 冀南棉区大面积喷施硼肥取得了可喜的增产效益,为了弄清土壤有效硼含量与棉花喷硼效果,研讨棉花土壤有效硼缺乏、适宜、中毒临界指标,本文对此进行了研究。更多还原

【Abstract】 In the south of Hebei,There have been an encouraging increase in yield when applying boron on a large scale.The paper is made to make clear the content of soil effective boron and the effect of spraying it to cotton field;study the critical index of the lack,the fit and the poisoning of the soil effective boron.更多还原