One of the most popular and trusted representatives of mineral nitrogen fertilizers, which are suitable for any soil for the cultivation of any crop species is urea.
Urea – CO (NH2) 2 – contains no less 46% of nitrogen. It produces by the synthesis of ammonia and carbon dioxide at high pressures and temperature. It is white fine-crystalline product, soluble in water. Hygroscopicity of urea at a temperature of 20 ° C is relatively small. Under the good storage, conditions caked little remains satisfactory dissipation. Especially good physical properties have granulated urea. Urea is considered one of the most effective nitrogen fertilizers.
It comes in two versions – A – for industrial use, and B – for agricultural use. Urea is used in medicine in the manufacture of drugs and pharmaceuticals, as a component of resins and adhesives in the wood processing industry. Besides fertilizers and glue, from urea is synthesized herbicides – chemicals used to kill unwanted vegetation (in full at a certain area).
Carbamide (urea) – a concentrated nitrogen fertilizer, readily soluble in water and refers to category of the universal.
The main macroelement of urea and other nitrogenous fertilizers proper nitrogen, a chemical element that is extremely important for the normal full life of the plant. In terms of dry substance, urea presents in a concentration of 46%. Element is directly connected with the construction of biomolecules and entree into the most important acids and proteins. Thus, nitrogen actively stimulates and promotes the growth of plants and crops. After discovery of such a useful element of its features, it became actively use and implement in agricultural production agronomists, which made it possible to obtain a limited area of land much larger plants of useful crops.
Carbamide (urea) can be added to any type of soil. Nitrogen improves the quality of fruit plants and fruits themselves. If the nitrogen in the soil is insufficient, branches become thin and weak, smaller branches, and leave a yellowish color in the fall, and the yellowing starts from the lower leaves, as originally nitrogen comes from domestic reserves the of plants, and it moves into the zone of growth – to the younger leaves and fruits. However, excess of nitrogen is harmful for plants, because there is a rapid development plants, and the trunk and branches grow in damage of the ovaries of fruit. Therefore, nitrogen fertilizers, particularly urea, are necessary to make, following the recommended dose, according to the possible methods of additional feeding: dissolved in water or in bulk, and then be watered. Urea making in the soil usually effected in spring.
Application of carbamide (urea). Use as the basic fertilizer or dressing all crops on different soils. At making of urea into the soil, should be promptly repaired it, as a superficial placement of fertilizer, nitrogen may be lost due to volatilization of ammonia from ammonium carbonate, decomposes readily in air: (NH4) 2 CO3 = NH4 + NH3 HSO3 especially on calcareous and alkaline soils. Significant losses in the form of ammonia can occur when using urea fertilizer in the meadows and pastures, because sod has a high cut-off activity. Urea can be successfully used for foliar feeding of vegetable and fruit crops, and later dressing of wheat for purpose of increasing the protein content in grain.
Currently, the share of consumption of urea among the entire group of nitric fertilizers is about 35%, the production and sale of urea is growing steadily, and in the month’s presowing on the agricultural market, it becomes a real deficit. Urea – a long-standing and highly effective fertilizer, interest on the part of farmers, despite the progress in the chemical industry is increasing.