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Controlled-release fertilizer is also known as controlled-availability fertilizer, delayed-release fertilizer, metered-release fertilizer, or slow-acting fertilizer. Usually CRF refers to nitrogen-based fertilizers. Slow- and controlled-release involve only 0.15% (562,000 tons) of the fertilizer market (1995).
The Fertilisers and Chemicals Travancore Limited, abbreviated as FACT, is an Indian central public sector undertaking headquartered in Kochi, Kerala.It was incorporated in 1943, by Maharajah Sree Chithira Thirunal Balarama Varma of the Kingdom of Travancore. [1]
Abu Qir Fertilizers and Chemical Industries Co SAE (ABUK.CA) [3] is a former state-owned company that is one of the largest producers of nitrogen fertilizers in Egypt and the Middle East. [4] It produces about 50% of the Egyptian nitrogen fertilizers. [5] It owns three plants that produce liquid fertiliser, ammonia, urea, and ammonium nitrate. [2]
Polysulphate is a brand name for polyhalite fertilizer products produced for farming, turf, and horticulture. The only mined source is a polyhalite seam that lies 150–170 m (490–560 ft) beneath the potash seam at Boulby Mine, England. [15]
CF Industries Holdings, Inc. is an American manufacturer and distributor of agricultural fertilizers, including ammonia, urea, and ammonium nitrate products. The company is based in Northbrook, Illinois, a suburb of Chicago, [3] and was founded in 1946 as the Central Farmers Fertilizer Company.
The values in an NPK fertilizer label are related to the concentrations (by weight) of phosphorus and potassium elements as follows: P 2 O 5 consists of 56.4% elemental oxygen and 43.6% elemental phosphorus by weight. Therefore, the elemental phosphorus percentage of a fertilizer is 0.436 times its P value. K
Its product line also includes phosphate and potash-based mineral fertilizers, as well as complex and specialty mineral fertilizer products. [ 3 ] [ 4 ] [ 5 ] The company was established in 1905 as Norsk Hydro — the world's first producer of mineral nitrogen fertilizers — and de-merged as Yara International ASA on 25 March 2004. [ 6 ]
The main use of calcium cyanamide is in agriculture as a fertilizer. [3] In contact with water, it hydrolyses into hydrogen cyanamide which decomposes and liberates ammonia: [5] CaCN 2 + 3 H 2 O → 2 NH 3 + CaCO 3. It was used to produce sodium cyanide by fusing with sodium carbonate: CaCN 2 + Na 2 CO 3 + 2 C → 2 NaCN + CaO + 2 CO
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