Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 September 1965
Published in Agron J 57:479-481 (1965)
© 1965 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Interaction of Nitrogen and Soil Moisture on the Production and Persistence of Timothy in Lysimeters1

F. M. Willhite, A. R. Grable and H. K. Rouse2

Synopsis: Urea-N increased production of timothy approximately 5-fold, irrespective of depth of water table and soil. Yields were about the same with water tables maintained at 2.5, 15, or 46 cm. as without a water table. Greatest yield occurred in lysimeters with 46 cm. of soil, 46-cm. water tables, and N fertilizer. Within 2 years, Juncus balticus completely dominated nonfertilized timothy growing with 2.5 or 15-cm. water tables. Formation of moss and a sod mat on the soil surface coincided with the appearance of Juncus.


1 Contribution from the Northern Plains Branch, Soil and Water Conservation Research Division, ARS, USDA, and Colorado Agricultural Experiment Station. Computation of analysis of variance by courtesy of the Western Data Processing Center, University of California. Presented before Div. S-6, American Society of Agronomy, Denver, Colorado, Nov. 21, 1963. Colorado Agr. Exp. Sta. Scientific Series No. 994.

2 Soil Scientist, USDA, and Associate Agronomist, Colorado State University; Soil Scientist, USDA; and Agricultural Engineer (deceased), USDA; respectively, Grand Junction, Colorado.

Received for publication December 17, 1964.





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 © 1965 by the American Society of Agronomy.