Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 September 1966
Published in Agron J 58:549-553 (1966)
© 1966 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Effect of Soil Bulk Density and Soil Water Pressure on Emergence of Grass Seedlings1

T. D. Hughes, J. F. Stone, Wayne W. Huffine and J. R. Gingrich2

Moisture was the most important factor influencing the emergence of common bermudagrass (Cynodon dactylon (L.) Pers.) and weeping lovegrass (Eragrostis curvula (Schrad.) Nees.) in a clay soil over the range of bulk density and soil water pressure investigated. Both grasses exhibited approximately the same emergence at the –1/3 and –1-bar soil water pressures. Of those soil strengths and oxygen diffusion rates encountered, none limited seedling emergence of either grass. Small correlation was found between soil strength and seedling emergence.

1 Contribution from Department of Agronomy, Oklahoma Agricultural Experiment Station, as a part of Projects S-782 and H-1120. Journal Manuscript No. 1288. Work was in cooperation with Bureau of Public Roads, U.S. Department of Commerce, and with Department of Highways, State of Oklahoma.

2 Graduate Research Assistant (now at Department of Agronomy, University of Illinois, in same capacity), Associate Professor, Professor, and former Associate Professor (now Olin Mathieson Co., Wichita, Kansas). Department of Agronomy, Oklahoma State University, Stillwater, Oklahoma. The authors wish to thank Dr. R. D. Morrison for his advice concerning statistical evaluation of experimental data.

Received for publication April 30, 1966.




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The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
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Environmental Quality		 The Plant Genome
Copyright © 1966 by the American Society of Agronomy.