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Wind-Blown Soil Abrasive Injuries to Winter Wheat Plants¹

Synopsis: Winter wheat plants were given fall and spring exposures to blowing soil in a wind tunnel. Average yields, weights of plant material, and number of heads for spring treatments were 46.4, 29.4, and 23.9% less, respectively, than fall treatments. Heading and ripening of grain was delayed 1 week to 10 days on severely exposed plants. The total amount of soil striking a plant was more important in depressing products of plant growth than was the length of time between exposures. The plants were shown to have remarkable recovery powers if given water after severe abrasive injury.

² Agricultural Engineer, Western Section of Soil and Water Management, A.R.S., U.S.D.A. Grateful acknowledgement is made to W. S. Chepil, project leader, and to A. W. Zingg, former project supervisor, Wind Erosion Laboratory, A.R.S., U.S.D.A., for their suggestions in planning the experiment; to H. H. Laude, Professor of Agronomy, and to J. I. Northam, assistant professor of mathematics, Kansas State College, for suggestions and assistance in direction of the statistical analysis of data.

Received for publication June 27, 1956.