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UREA 1. Introduction Urea [57-13-6] was discovered in urine by Rouelle in 1773 and first synthesized from ammonia and cyanic acid by Woehler in 1828. This was the first synthesis…

A fertilizer or manure contains one or more of the essential elements e.g. Nitrogen, Potassium, Phosphorus, Calcium, Magnesium etc. It is applied to soils to encourage crop…

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