Urea Transformations in Flooded Soil.

  • Hongprayoon, Chawalit
Publication date
January 1992
Publisher
LSU Digital Commons
Language
English

Abstract

Laboratory incubation studies were conducted to measure adsorption, movement, and transformations of urea and hydrolyzed ammoniacal N in flooded soil columns. Urea was added to the floodwater (750 mg N L$\sp{-1}$, equivalent to 150 kg N ha$\sp{-1}$) of Crowley silt loam soil columns and urea diffusion and urea hydrolysis were measured. Subsequent NH$\sb4\sp+$-N and NO$\sb3\sp-$-N distribution after urea application and hydrolysis were measured over a 30 d period under aerobic and anaerobic conditions. Effects of percolation rates (0, 1, and 2 cm d$\sp{-1}$), and the use of urease inhibitor, N-(n-butyl) thiophosphoric triamide (NBPT), on movement and transformations of urea in flooded soil columns were also investigated over a period of 0.5,...

Extracted data

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