Zinc deficiency causes a severe decrease in vegetative growth and the micro-leaf factor (sweeping), and in general, zinc is responsible for building proteins, regulating hormone activity, and producing energy.

Although zinc is one of the scarce nutrients and is needed by plants in small amounts, zinc deficiency is very common in different parts of the world. More than 60% of Iran’s agricultural lands suffer from a severe lack of zinc due to the calcareous or alkaline nature of the soil, so they face a 50% drop in yield.

Zinc (Zn) as an essential element in the activity of plant enzymes, effective in the transfer of elements, is the main component of the amino acid tryptophan and the hormone auxin. Its deficiency causes a sharp reduction in vegetative growth and the cause of micro-leaves (sweeping). In general, the production of proteins, regulation of hormone activity and energy production in plants are influenced by zinc element. Many plants, especially citrus fruits, apples, grapes, oilseeds, legumes, corn and rice are very sensitive to zinc deficiency.