Iron is an important micronutrient needed in small quantities by all plants. Many vital processes such as the production of chlorophyll and nitrogen fixation depends on iron. Iron deficiency is among the most widespread nutritional deficiencies.
Iron is largely sufficient in most soil; however, its availability varies with soil conditions throughout the year and on the plants themselves. Moreover, iron becomes unabsorbable when the soil is not acidic enough.
Because iron chlorosis appears mainly in crops grown on calcareous soil, it is often called lime-induced chlorosis.
Iron is considered as an immobile micro-element, meaning that signs of iron deficiency first manifest during the stage of new growth. The main symptom will be Inter-venial chlorosis of new leaves, which means that the tissue between the veins turns yellow in color, while the veins remain green.
FeEDDHA, connu sous le nom de Sequestrene 138, est un engrais à base de fer efficace pour la correction de la chlorose du fer. Il fonctionne mieux lorsqu’il est appliqué sur les racines des plantes via un système d’irrigation. Le fer séquestré est disponible pour les plantes sans ajuster le pH du sol, ce qui n’est pas le cas du sulfate de fer – un autre composé utilisé pour traiter les carences en fer.