Modern agriculture makes use of different mineral fertilizers such as nitrogen, phosphate and potassium fertilizers as well as compound and micro fertilizers. LLC “Rivne Trade Service” has a large range of mineral fertilizers for all needs of the modern farmer. Nitrogen fertilizers. The value of these fertilizers consists in the fact that nitrogen is included in the structure of plant protein, amino acid, nucleic acid and other vital compounds. Plants absorb only mineral nitrogen in the form of ammonium ions (NH4 +) and nitrate ions (NO3-). The lack of nitrogen causes the inhibition of plant growth, weakened formation of lateral shoots and roots. In addition, small leaves are observed etc. The main outward sign of nitrogen deficiency are pale green color of leaves, the appearance of necrosis, drying out and dying tissues. Nitrogen mineral fertilizers are widely use for nitrogen feeding optimization of plants in agriculture. Almost all of them, except for sodium and calcium nitrate, are physiologically acidic. Specific norms of lime are established to neutralize the acidity. Liquid ammonia nitrogen fertilizers (ammonia water, liquid ammonia) have the ability to lose ammonia, so they have to be stored in airtight tanks.
Depending on the form of nitrogen compounds Nitrogenous fertilizers are divided into nitrate, ammonium, ammonia, ammonium-nitrate and amide. In nitrate nitrogen fertilizers nitrogen is contained in the form of anion nitric acid. These fertilizers include sodium and calcium nitrate. Ammonium nitrogen fertilizers include ammonium chloride, ammonium sulfate, ammonium water, anhydrous ammonia, ammoniate containing nitrogen in the form of ammonium cation and ammonia. The main ammonium-nitrate nitrogen fertilizer is ammonium nitrate, which includes nitrogen in the form of ammonium ions and nitrate ions. Amide fertilizers contain nitrogen in the amide and amino compounds. These include urea and calcium cyan amide. Another group of nitrogen fertilizers includes urea and ammonium nitrate mix (UAN) and Ammonium salts. The most common nitrogen fertilizers in modern agriculture are ammonia water, ammonium nitrate, and others. Ammonia water (aqueous ammonia – NH4OH) is produced in two varieties: 1st grade – nitrogen 20.5%, 2nd – 18%. It’s a colorless or yellowish liquid with a pungent odor of ammonia. Nitrogen is mainly in the form of ammonia as well as ammonium. Ammonia water is stored and transported in sealed reservoirs to prevent ammonia loss.