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Published online 1 January 1965
Published in Agron J 57:68-70 (1965)
© 1965 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Relative Water Requirement and Its Relationship to Tiller Number and Heading Date in Eight Oat Varieties1

N. W. Widstrom, D. D. Harpstead and D. B. Shank2

Synopsis: Differences in relative water requirement found among eight varieties of oats remained highly significant after removal of variation due to tiller number and heading date. Neither character was closely associated with water use, but heading date was more consistently related than tiller number. Environment affected water requirement considerably, but genotypes maintained, their relative ranks in efficiency very well. The data suggest that sufficient genetic variability in water use exists to warrant selection for increased efficiency.

1 Contribution from the Department of Agronomy, South Dakota Agr. Exp. Sta., Brookings, So. Dak. Approved for publication by the Director as Journal Series No. 618. Part of a thesis submitted by the senior author in partial fulfillment of the requirements for the Ph.D. degree at South Dakota State College.

2 Formerly graduate N.D.E.A. Fellow (now Research Geneticist, Crops Research Division, ARS, USDA, Tifton, Ga.); formerly Associate Agronomist (now Associate Geneticist, Colombia Agricultural Program of the Rockefeller Foundation, Colombia); and Agronomist, South Dakota State College.

Received for publication June 19, 1964.




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Copyright © 1965 by the American Society of Agronomy.