... When leaves lack of green ,firstly leaf will become yellow,and vein still keep green ; ... white,vein yellow,brown spots or necrotic tissue will appear on both sides of the central ... focus . At the last, many leaves will fall. Quality Specification Appearance Light yellow powder Solubility ... pepper, cotton, peanuts,on iron fertilizer application can achieve a higher yield. 4.Usage: 4.1 Proposed ...