Decomposition of Urea Phosphate in Soils1
- J. M. Bremner and
- L. A. Douglas2
Studies of the decomposition of urea phosphate (NH2CO-NH2 · H3PO4) in soils showed that the phosphoric acid in this compound retards enzymatic hydrolysis of the urea by soil urease and reduces gaseous loss of urea N as ammonia. When soils treated with urea and urea phosphate were incubated at 20C for 14 days, the percentage loss of urea N as ammonia was 4.6–61.1% (average, 21.2%) for the soils treated with urea, but was only 0.1–1.1% (average, 0.7%) for the soils treated with urea phosphate. The studies reported support the conclusion from previous work that urea phosphate has significant potential advantages over urea as a fertilizer.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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