Fertiliser usage

Markets. Industrial use of ammonia varies according to region. Eor example, industrial usage represents 20% of the ammonia production in the United States and Western Europe, 10% in the USSR, 1—10% in Asia, and 5% in Latin America and North Africa (79). Fertiliser ammonia consumed domestically in most countries is converted to straight or compound fertilisers such as urea, ammonium nitrate, diammonium phosphate, and various grades of mixed fertilisers. However, almost 29% of ammonia nitrogen in the United States is consumed as direct appHcation material. The use of nitrogen solution such as urea and ammonium nitrate (UAN) has also become popular in the United States and the USSR. 

It was first synthesized by Friedrich Wohler in 1828 by evaporating a solution of ammonium cyanate. Urea is found in small amounts in the blood of mammals. Its principal industrial usage is in the manufacture of plastics (specifically, urea-formaldehyde resin) and is also a component of many fertilisers, providing a nitrogen source for plants. 

Divestment of the nitrogen fertiliser and titanium dioxide businesses, and expansion of the environmental business announced as a result of changes to the business strategy, should result in a substantial reduction in energy usage and releases to air and water in 2000. 

Uses Phosphoric acid and phosphate fertilisers 800 000 A declining usage. Developing countries which have reserves of phosphate rock are increasing their fertiliser production and selling the finished product in preference to the raw material... 

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