zur Hauptnavigation springen
zur Hilfsnavigation springen
zum Inhalt der Seite springen
Folanx® CarboFe - the iron fertilizer solution

Nutrients and their functions: Iron (Fe)

Iron is present in the soil primarily in the form of oxide and hydroxide compounds. It is therefore not readily available in lime-rich soils, soils to which lime has been added and high pH soils (pH > 6.8). Soils with poor drainage (damp, moldy buildup) and/or at low temperatures are frequently deficient in iron.
The copper concentration also has an effect on the availability of iron in the soil. If the copper concentration increases, e.g. as a result of excessive copper spraying, copper compounds promote the solidification of iron by raising the pH in the soil.
General symptoms of deficiency
Iron deficiency is expressed by the yellowing of the youngest leaves while the midrib and leaf veins remain green. Because of the variety of possible causes, the literature also speaks of "lime-induced chlorosis", "soil-compaction chlorosis", "bad weather chlorosis", "bicarbonate chlorosis", "ethylene chlorosis" and "pale chlorosis".
Iron deficiency is frequently accompanied by a manganese deficiency. In contrast to iron deficiency, a manganese deficiency exhibits not only a yellowing of the youngest leaves, but the areas of the leaf surface adjacent to the leaf veins are still green.
Iron deficiency in vineyards occurs primarily on compacted soils. It is also promoted by insufficient root growth of the vines. The iron deficiency promotes the withering of the grapes under extreme conditions and can even lead to the death of the vine. The trigger is the reduction of photosynthesis and thus the loss of energy of the vines.
Fruit farming
Iron deficiency reduces growth, especially if it recurs year after year. Typical symptoms are reduced bloom, premature dropping of fruit and dry, withered shoots. Over the long term, the tree becomes stunted.
Pears on quince stock and peaches on seedling stock are particularly susceptible to iron deficiency.
Berry farming
Here, too, the leaves become pale and the leaf veins remain green. Over time, however, the leaf veins also yellow and necrosis appears first on the margins of the leaves, which later leads to the death of the leaves. As with all crops, reduced root growth can also be observed in berry farming.