很多地区由于土壤缺铁造成作物黄化失绿症,影响生长,特别明显的是生长在石灰性(pH高)土壤的作物,若缺铁严重甚至造成植株死亡或减产。在作物整个生长季节都需要一定数量的铁,由于铁在植株中不能从老叶运转到新叶。从缺乏叶绿素而变黄的叶片上很容易辨认出失绿症,它在生长早期是明显 In many areas, crop chlorosis and greening are affected by soil iron deficiency, particularly in crops grown in calcareous (pH-high) soils that can cause plant deaths or cuttings if iron deficiency is severe. A certain amount of iron is needed throughout the growing season of the crop, as the iron can not move from the old leaf to the new leaf in the plant. Chlorosis, which is evident on leaves that turn yellow when lacking chlorophyll, is evident in the early stages of growth