... 2.3.This kind of trace elements fertilizer of iron can specially prevent and treat diseases of yellow leaves,lacking ... vegetables and walnut, by field trials, wheat applicated by iron fertilizer application ,can yield 10%, other crops such as rice, soybeans, ... apples, vegetables, green pepper, cotton, peanuts,on iron fertilizer application can achieve a higher yield. 4.Usage: 4.1 Proposed ...