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Published in Crop Sci 11:124-125 (1971)
© 1971 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Yield Components and Leaf Characteristics Associated with the Water Requirement of Alfalfa1

A. K. Dobrenz, D. F. Cole and M. A. Massengale2

Five cultivars and two experimental lines of alfalfa (Medicago sativa L.) displayed significant differences in the grams of water required to produce a gram of dry matter under controlled environmental conditions. Stem and petiole weight, leaflet weight, total forage dry weight, and leaf area were all significantly associated with the water requirement of alfalfa. Leaf thickness and palisade cell density were not associated with water requirement or total transpired water, but did differ significantly among cultivars.

Key Words: Transpiration • alfaalfa anatomy

1 Contribution from the Department of Agronomy, University of Arizona, Tucson, Arizona. This research was financed in part by Grant 716–15–2 from the Cooperative State Research Service of the U. S. Department of Agriculture, Arizona Agricultural Experiment Station Journal Paper No. 1652.

2 Associate Agronomist, Research Assistant, and Professor and Head, Department of Agronomy, University of Arizona, Tucson, 85721.

Received for publication June 10, 1970.




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