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Published online 1 July 1964
Published in Agron J 56:405-410 (1964)
© 1964 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Physiological Role in Regulating Transpiration Rate of the Cotton Plant1

E. L. Skidmore and J. F. Stone2

Synopsis: A decrease in transpiration rate, which could not be explained on the basis of physical factors of the environment, was observed. Root impedance to water absorption and transmission was found to be approximately five times greater at the time of day when transpiration rate was greatly attenuated than at the time when transpiration was at a maximum. Transpiration rate was directly proportional to evaporative demand early in the day but later in the day when root: impedance was high, an inverse and less well denned relationship existed.

1 Journal Manuscript No. 963 of the Oklahoma Agricultural Experiment Station, Stillwater, Okla. Presented before Division VI, Soil Science Society of American, Denver, Colo., November 1963.

2 Instructor and Associate Professor, Department of Agronomy, Oklahoma State University, Stillwater, Okla. The senior author is presently Research Soil Scientist, USDA. Manhattan, Kansas.

Received for publication January 24, 1964.




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The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
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Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1964 by the American Society of Agronomy.