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Decomposition of Urea Phosphate in Soils
Author(s) -
Bremner J. M.,
Douglas L. A.
Publication year - 1971
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1971.03615995003500040028x
Subject(s) - urea , urease , ammonia volatilization from urea , chemistry , ammonia , phosphate , phosphoric acid , soil water , fertilizer , hydrolysis , decomposition , inorganic chemistry , nitrogen , diammonium phosphate , phosphorus , environmental chemistry , nuclear chemistry , biochemistry , organic chemistry , ecology , biology
Studies of the decomposition of urea phosphate (NH 2 CO‐NH 2 · H 3 PO 4 ) 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.