CONVECTIVE TRANSPORT OF AMMONIUM WITH NITRIFICATION IN SOIL

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Abstract
Dispersion equations with first-order reaction rates for nitrogen transformations were applied to describe the convective transport of NH4+ with nitrification and denitrification in soil. The equations describing the concentrations of NH4+, NO2− and NO3− as functions of position, time, rate constants, average solution velocity and the distribution coefficient of NH4+ between soil and soil solution were obtained. Several values of parameters were chosen to obtain the concentration profiles of NH4+, NO2− and NO3− along the soil column at several times. Steady-state concentration profiles and the time required to attain the steady state are discussed.

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