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Soil Science Society of America Journal Abstract -

Nitrate Movement with Zero-order Denitrification in a Soil Profile1


This article in SSSAJ

  1. Vol. 44 No. 5, p. 898-902
    Received: Dec 1, 1978
    Accepted: May 30, 1980

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  1. R. S. Kanwar,
  2. J. L. Baker,
  3. H. P. Johnson and
  4. D. Kirkham2



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.

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