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Published online 1 July 1958
Published in Agron J 50:377-380 (1958)
© 1958 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Some Responses of Alfalfa (Medicago Sativa L.) to Different Lengths of Day and Growth Regulators in the Greenhouse1

M. A. Massengale and J. T. Medler2

Synopsis: Alfalfa plants grown under 14 hours of light were more vigorous in growth, had larger leaves and longer internodes, and were taller than those grown under 12 hours. Flowering of plants was profuse in the longer daylength, but was sparse, if present at all, under shortday conditions. Spraying with different growth-regulators altered the heights of plants, length of internodes, and flowering response. Formative effects were also evident from treatment with certain of the chemicals.

1 Contribution from the Departments of Agronomy and Entomology, University of Wisconsin, Madison, Wis. Part of a thesis submitted by the senior author in partial fulfillment of the requirements for the Ph.D. degree. Published with approval of the Director, Wisconsin Agr. Exp. Sta.

2 Formerly Research Assistant, and Associate Professor, Departments of Agronomy and Entomology, respectively. The authors are indebted to M. J. Wright for his many helpful suggestions and advice, and to J. H. Torrie for assistance in the statistical analysis.

Received for publication October 7, 1957.




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Copyright © 1958 by the American Society of Agronomy.