Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 January 1964
Published in Agron J 56:63-66 (1964)
© 1964 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Influence of a Barley Companion Crop Upon Root Distribution of Alfalfa, Birdsfoot Trefoil, and Orchardgrass1

Clee S. Cooper and Hayden Ferguson2

Synopsis: Vertical and lateral root growth of all three species was reduced when they were established with a companion crop. The companion crop was most deleterious to root growth of birdsfoot trefoil. Barley was able to compete with forage seedlings for moisture and nutrients early in the establishment period due to rapid root growth. Soil moisture and temperature were lower under the barley crop. Mature barley intercepted 89% of the incident light in early morning and 22% at noon.

1 This paper reports results of cooperative investigations of Montana Agricultural Exp. Sta. and the Crops Research Division, ARS, USDA. Published with approval of the Director as paper No. 616. Journal Series, Montana Agr. Exp. Sta.

2 Agronomist, Crops Research Division, ARS, USDA, and Soil Physicist, Plant and Soil Science Dept., Montana State College, Bozeman.

Received for publication May 22, 1963.




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The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
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Environmental Quality		 The Plant Genome
Copyright © 1964 by the American Society of Agronomy.