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Volatilization losses of surface-applied urea nitrogen from Vertisols in the Indian semi-arid tropics

OAR@ICRISAT

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Relation http://oar.icrisat.org/7526/
http://dx.doi.org/10.1007/BF00334581
 
Title Volatilization losses of surface-applied urea nitrogen from Vertisols in the Indian semi-arid tropics
 
Creator Patra, A K
Burford, J R
Rego, T J
 
Subject Soil Science
Agriculture-Farming, Production, Technology, Economics
 
Description The N loss from Vertisols was estimated by measuring the loss of 15N-labelled urea N under conditions that promote NH3 volatilization. Urea granules were placed on the top of 150-mm deep soil columns (Vertisols) collected from three sites with a range in pH, electrical conductivity, and cation exchange capacity. There were two contrasting moisture treatments, one near field capacity (wet) and another with intermittent wetting of the soil surface before allowing the columns to dry (moist-dry). The results indicated that losses were influenced markedly by pH and moisture treatment, being 29.5, 33.5, and 33% from the wet soils and 37, 42, and 40.5% from the moistdry soils with pH values of 7.7, 8.2, and 9.3, respectively. These observations clearly indicate that broadcasting of urea on the surface of Vertisols may cause substantial N losses.
 
Publisher Springer Verlag
 
Date 1996
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/7526/1/BFS_22_4_345-349-1996.pdf
Patra, A K and Burford, J R and Rego, T J (1996) Volatilization losses of surface-applied urea nitrogen from Vertisols in the Indian semi-arid tropics. Biology and Fertility of Soils, 22 (4). pp. 345-349. ISSN 0178-2762