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Published in Crop Sci 7:394-395 (1967)
© 1967 Crop Science Society of America
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Use of Area-Weight Relationship to Estimate Leaf Area in Alfalfa (Medicago sativa L. Cultivar ‘Moapa’)1

Cayland D. Robison and M. A. Massengale2

The relationship of leaf area to leaf weight was studied in Moapa alfalfa to determine if leaf weight could be used as an estimation of leaf area. Four harvest management regimes and three growth periods were utilized. Leaflets were removed, weighed, verifaxed for measuring with a planimeter, and the oven-dry weight determined. The seasonal change in total leaf area and in size of individual leaves did not appreciably influence the leaf area-leaf weight relationship. Data show that leaf weight can be used to determine leaf area in Moapa alfalfa.

Key Words: leaf area index • leaf weight leaf area • seasonal growth • alfalfa

1 Contribution from the Department of Agronomy, University of Arizona, Tucson, Ariz., as Journal paper No. 1184. Part of a dissertation submitted by the senior author in partial fulfillment of the requirements of the Ph.D. degree. This work was partially supported by Western Regional Research Project W-58.

2 Formerly Research Assistant (now Superintendent of Southern Nevada Field Laboratory, Logandale, Nevada) and Professor and Head, Department of Agronomy, University of Arizona, Tucson.

Received for publication November 14, 1966.




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