Premium
Volatilisation loss of nitrogen from urea added to some soils of east Pakistan
Author(s) -
Khan D. H.,
Haque M. Z.
Publication year - 1965
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740161207
Subject(s) - ammonia volatilization from urea , urea , volatilisation , soil water , chemistry , nitrogen , ammonium carbonate , calcareous , ammonium , environmental chemistry , carbonate , agronomy , zoology , inorganic chemistry , environmental science , botany , soil science , biology , biochemistry , organic chemistry
A high (20–70%) loss of N, added as urea, due to volatilisation was observed in some soils of East Pakistan under laboratory conditions. This loss was maximum within the first week, as was the rate of hydrolysis to ammonium carbonate. N‐loss was maximum in a calcareous soil, minimum in an acid soil, and medium in near‐neutral soils. Soil pH increased after urea application and declined after 2 weeks. Placing urea 2 in. below the surface markedly inhibited loss of gaseous‐N, recovery being 44–89% of total loss. Association of superphosphate with urea at depth placement further minimises loss of N.