HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Misra, C. Articles by Biggar, J. W. Search for Related Content PubMed Articles by Misra, C. Articles by Biggar, J. W. Agricola Articles by Misra, C. Articles by Biggar, J. W.

Nitrogen Transformations in Soil During Leaching: II. Steady State Nitrification and Nitrate Reduction¹

ABSTRACT

Nitrogen transformations were examined by means of a miscible displacement technique that permitted passage of air with different levels of oxygen through the soil. With the use of steady state solutions of equations describing the convective transport of NH₄⁺ and NO₃^- ions in Columbia silt loam, first-order reaction rate constants k₁ and k₂ were ascertained for NH₄⁺-oxidation and NO₃^--reduction, respectively. Values of k₁ were measured to be ten-fold greater than those of k₂. At an oxygen level of 0.5% in the gaseous phase, nitrification was apparently inhibited.

¹ Contribution from the Dep. of Water Science and Engineering, Univ. of California, Davis 95616.

² Graduate Student and Professors of Water Science, respectively. The senior author is now Lecturer, Univ. of Agriculture and Technology, Orissa, India.

Received for publication August 6, 1973. Accepted for publication December 10, 1973.