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: III. Nitrae Reduction in Soil Columns¹

ABSTRACT

Nitrate reduction in water-unsaturated Columbia silt loam columns was examined at 19.5C and 34.5C with three levels of oxygen (0.5, 5, and 20%) in an aerating gas passing through the soil. Following a continuous application of NH₄⁺ solution, a pulse of a NO₃^- solution was leached through these columns. After the decay of the pulse, a continuous application of NO₃^- solution allowed mathematical analysis leading to ascertaining NO₃^- reduction rate coefficients. The temperature dependence of these constants as a function of oxygen composition was discussed and the need for microbial population and activity analysis is emphasized.

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 8, 1973. Accepted for publication December 10, 1973.