SSSAJ Grow Your Career with SSSA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Soil Sci Soc Am J 26:459-462 (1962)
© 1962 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Broadbent, F. E.
Right arrow Articles by Tyler, K. B.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Broadbent, F. E.
Right arrow Articles by Tyler, K. B.
Agricola
Right arrow Articles by Broadbent, F. E.
Right arrow Articles by Tyler, K. B.

Laboratory and Greenhouse Investigations of Nitrogen Immobilization1

F. E. Broadbent and K. B. Tyler2

ABSTRACT

Immobilization of tracer nitrogen added as ammonium sulfate or as nitrate was followed by analysis of inorganic nitrogen in Moreno sandy loam and Sacramento clay during the course of incubation experiments. In Sacramento clay receiving ammonium sulfate plus straw the nitrifying bacteria were able to compete effectively with the immobilizing flora for nitrogen, whereas in the Moreno soil this was not the case. In both soils immobilization attained a maximum in 6 to 10 days. There was some increase in inorganic nitrogen thereafter, but none of this resulted from remineralization of the tracer nitrogen added initially. In greenhouse experiments competition for added tracer nitrogen between a growing crop and the immobilizing flora emphasized preferential utilization of ammonium nitrogen by soil microorganisms and of nitrate nitrogen by the crop. In Moreno sandy loam, overall recovery of the added tracer was higher under treatments favoring immobilization than in pots receiving only fertilizer.

NOTES

1 Contribution from the Department of Soils and Plant Nutrition, University of California, Davis, and the Department of Vegetable Crops, University of California, Riverside. Presented before Div. III, Soil Science Society of America, Nov. 30, 1961, at St. Louis, Mo.

2 Professor of Soil Microbiology and Assistant Olericulturist, respectively.

Received for publication December 19, 1961. Accepted for publication March 1, 1962.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1962 by the Soil Science Society of America.