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笔者1992～1996年利用硫酸镁稀释液对马铃薯进行根外追施,收到了较好的效果。其具体的方法为:在马铃薯植株开花时,选择无雨的天气,每亩地用
The author from 1992 to 1996, the use of magnesium sulfate diluent on the root of the potato top-dressing, has received good results. The specific method is: in the flowering of potato plants, the choice of no rain weather,