Agronomy Journal Grow Your Career With ASA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published online 1 July 1969
Published in Agron J 61:521-523 (1969)
© 1969 American Society of Agronomy
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 Porter, L. K.
Right arrow Articles by Grable, A. R.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Porter, L. K.
Right arrow Articles by Grable, A. R.
Agricola
Right arrow Articles by Porter, L. K.
Right arrow Articles by Grable, A. R.

Fixation of Atmospheric Nitrogen by Nonlegumes in Wet Mountain Meadows1

L. K. Porter2 and A. R. Grable2

Mountain soils subjected to excessive irrigation and high water tables accumulate organic matter in sod mats. Meadow soils often contain two or three times more N than equal areas of adjacent dry soils. Symbiotic nitrogen fixation by legumes is one possible source of N for sod mat formation. Fixation of N2 by free-living organisms has also been postulated and was verified by the laboratory studies reported here. Nitrogen fixation by sod mats containing no legumes was determined at 18C in atmospheres containing N215 Both photosynthetic and nonphotosynthetic organisms appeared to fix N2. In 10 days, mats in the dark fixed from 0.76 to 1.90 kg N2 ha–1 and illuminated mats fixed from 3.72 to 6.86 kg N ha–1.

Key Words: Mountain meadows • Nitrogen-15

1 Contribution from the Northern Plains Branch, Soil and Water Conservation Research Division, Agricultural Research Service, USDA, in cooperation with Colorado Agr. Exp. Station, Scientific Journal Series No. 1368.

2 Research Soil Scientists, USDA, Fort Collins, Colo. 80521 and Mandna, N. D., respectively.

Received for publication November 29, 1968.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1969 by the American Society of Agronomy.