Iron deficiency in plants
Iron, despite being a micronutrient, that is an element that plants need in small quantities, is very important for their development, because it is useful for the construction of many molecules, including chlorophyll. However, iron in nature is not readily available to plants, mainly because it oxidizes in contact with air and is not absorbable in this form. Therefore, iron deficiencies are easily detected in many types of plants.
The most typical symptom of iron deficiency, since it contributes to the formation of chlorophyll, is the very pronounced yellowing of the leaves which are younger, which starts from the rib and ends up extending first to the whole leaf, then to the whole plant.
Iron deficiency can also occur in calcareous soils where it forms insoluble compounds. Even the excess of other elements can hinder the absorption of iron, among these is aluminum. Irrigation with excessively calcareous waters can also lower iron absorption. For example, among the plants that show iron deficiencies, we find acidophilic plants, such as camellia and gardenia, especially if planted in neutral or basic soils. Iron deficiency is observed especially after the spring recovery phase. In case of iron deficiency it is possible to intervene with products to be distributed on the ground or directly on the leaves, because the effect is more immediate. Furthermore, iron chelates can be used, which release this micronutrient gradually over time.