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Nitrate Movement with Zero‐order Denitrification in a Soil Profile
Author(s) -
Kanwar R. S.,
Baker J. L.,
Johnson H. P.,
Kirkham D.
Publication year - 1980
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/sssaj1980.03615995004400050003x
Subject(s) - denitrification , thermal diffusivity , zero order , nitrate , soil science , nitrogen , soil horizon , environmental science , soil water , environmental chemistry , chemistry , first order , hydrology (agriculture) , geotechnical engineering , thermodynamics , mathematics , geology , physics , organic chemistry
A theoretical analysis of the movement of nitrates in an unsaturated soil with zero‐order denitrification is presented. The transport equation and boundary conditions are established to represent a field situation (i.e., application of N to the surface of a soil that already has nitrogen present in its profile). An analytical solution is derived. For given values of the diffusivity, pore solute velocity, and the rate coefficients for denitrification, the relative concentration profiles are shown at different times. Comparison with published data is made and it seems that the theoretical relationship fits the data reasonably well.