Crop Science Grow Your Career with CSSA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published online 19 March 2008
Published in Crop Sci 48:789-793 (2008)
© 2008 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Figures Only
Right arrow Full Text
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
Google Scholar
Right arrow Articles by Rao, S. C.
Right arrow Articles by Northup, B. K.
PubMed
Right arrow Articles by Rao, S. C.
Right arrow Articles by Northup, B. K.
Agricola
Right arrow Articles by Rao, S. C.
Right arrow Articles by Northup, B. K.
Related Collections
Right arrow Water Use
Right arrow Other Crop Management
Right arrow Soybean

Forage and Grain Soybean Effects on Soil Water Content and Use Efficiency

S. C. Rao* and B. K. Northup

USDA-ARS, Grazinglands Research Lab., 7207 W. Cheyenne St., El Reno, OK 73036. Mention of trademark, proprietary product, or vendor does not constitute a guarantee or warranty of the product by USDA and does not imply its approval to the exclusion of other products that may be suitable

* Corresponding author (Srinivas.rao{at}ars.usda.gov).

Growing legumes in the southern Great Plains (SGP) during fallow periods between wheat (Triticum aestivum L.) crops can protect soil, add N to soil, and supply high-quality summer forage. This study determined the water used, water use efficiency (WUE), and soil water depletion of forage (n = 3) and grain (n = 1) soybean [Glycine max (L.) Merr.] cultivars on silt loam soils following winter wheat harvest during the 2003 to 2005 summer growing seasons. Interactions (P < 0.01) in soil water content occurred between sampling date, cultivars, and years. More soil water was recorded under soybean in 2003 than 2004 or 2005, but was lower than in fallow plots. Year effects (P < 0.05) were recorded for standing crop, water used, and WUE. While cultivar effects were not significant P > 0.10). All cultivars used 2.0 to 2.5 times more water in 2004 and 2005 than 2003 (driest year). Forage production in 2003 (3034 kg ha–1) was 55% lower than in 2004 and 2005. Higher WUE (kg ha–1 mm–1) was recorded in 2004 (16.0) than 2003 (13.2) or 2005 (10.9). Incorporating soybean into fallow periods following wheat generally limits the amount of soil water available for fall production of wheat forage in the SGP.

Abbreviations: DAS, days after seeding • SGP, southern Great Plains • WUE, water use efficiency

All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permission for printing and for reprinting the material contained herein has been obtained by the publisher.

Received for publication August 1, 2007.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Vadose Zone Journal
Journal of Plant Registrations Soil Science Society of America Journal
Journal of Natural Resources
and Life Sciences Education		 Journal of
Environmental Quality
Copyright © 2008 by the Crop Science Society of America.