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NPK ratings consist of three numbers separated by dashes (e.g., 10-10-10 or 16-4-8) describing the chemical content of fertilizers. [ 29 ] [ 30 ] The first number represents the percentage of nitrogen in the product; the second number, P 2 O 5 ; the third, K 2 O. Fertilizers do not actually contain P 2 O 5 or K 2 O, but the system is a ...
The additional numbers are similarly reported in the oxide mass fraction form. For example, a Polish fertilizer labeled "NPK (Ca,S) 4-12-12 (14-29)" has an equivalent of 14% soluble calcium oxide and 29% total sulfur trioxide. [6]
The most commonly used grade of these fertilizer solutions is UAN 32.0.0 (32%N) known as UN32 or UN-32, which consists of 45% ammonium nitrate, 35% urea and only 20% water. Other grades are UAN 28, UAN 30 and UAN 18.
Uralchem was founded in 2007 by businessman Dmitry Mazepin, who was the majority shareholder of the enterprise until 2022, when he reduced his share to 48%. [9] [10] [11] According to the company website, Uralchem was established after the controlling stakes of chemical companies Kirovo-Chepetsk Chemical Works and Azot were combined to form a single enterprise.
EuroChem produces nitrogen, phosphate and potash fertilizers, as well as complex fertilizers, iron ore and other industrial products. It is a company with most production assets in Russia, which moved its headquarters to Zug, Switzerland, in 2015 "to be located in a neutral country to attract capital and talent, and grow globally". [14]
This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. ... (8.31 × 10 16 kg) 900: 12 000: 2017 ...
Uralkali develops the Verkhnekamskoye potassium and magnesium salt deposit, one of the world's largest. A substantial part of natural potassium salt is processed into a commercial product, potassium chloride, which is used as a fertiliser applied either directly to the soil or as an ingredient of compound NPK [clarification needed] fertilisers ...
HPO 2− 4 ⇌ PO 3− 4 + H +, pK a3 = 12.37 The difference between successive p K a values is sufficiently large so that salts of either monohydrogen phosphate, HPO 2− 4 or dihydrogen phosphate, H 2 PO − 4 , can be prepared from a solution of phosphoric acid by adjusting the pH to be mid-way between the respective p K a values.