Zinc deficiency affects yield

Zinc belongs to the group of trace elements, which means that plants need small amounts of zinc. To achieve high yields, crops usually require less than 1 kg zinc per hectare, or quantities of zinc are expressed in grams, not kilograms per hectare. Although consumed in small quantities, lack of zinc causes serious disturbances in the development and growth of plants. The specific role of zinc in the physiology of plants is not fully explored, but we know that he is part of a number of enzymes involved in different metabolic processes. Zinc deficiency causes a shortage of any of these enzymes with the disorder occurs in normal growth and development of crops. It ultimately results in lower yields and lower profitability. Even the lack of zinc small scale, which gives visible urinary deficit may cause a reduction in yields of over 20%.
Zinc deficiency causes various symptoms in different cultures. Zinc is not very mobile in the plant and because symptoms occur in younger leaves. Since the most common symptom is the appearance of chlorosis in the area between the nerves of the leaf. Over time arise bronze necrotic spots that turn into large areas of the leaf occupied by necrotic tissue with bronze color. In addition, some plants are a decrease of growth and plants do not achieve the required size. In fruit crops often causes tendrils that have leaves that remain small and do not achieve the required size.
Lack of zinc occurs mostly due to insufficient amount of zinc in soils. However the lack of zinc is associated with a range of other factors besides the content of zinc in the soil. First, here is the reaction of the soil and the soil with a neutral and alkaline reaction, zinc is less available. Besides the pH of the importance of the content of phosphorus in the soil, the soil rich in zinc phosphate is less available. As in soils that can be expected zinc deficiency stating gritty soils, which contain a small amount of organic matter, carbonate
soils, saline soils, highly moist soil, especially rice and soils, and can occur in Vertisols. Zinc deficiency can be expected in all soils with high pH, soil with low content of organic matter, with a high content of phosphorus, with a high content of magnesium, a high content of nitrogen, especially in nitrate form and soil that prevails. Lack of zinc occurs in cold soils (or early spring, when the soil is not sufficiently heated), eroded soils and shallow soils, especially if the treatment mix soil with soil substrate. It is believed that the lack of zinc occurs in over 50% of agricultural land in the world.