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Emergence of Medusahead and Other Grasses from Four Seeding Depths

Published online by Cambridge University Press:  12 June 2017

James A. Young ,
Raymond A. Evans  and
Richard E. Eckert Jr.
James A. Young
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr., Reno, Nevada
Raymond A. Evans
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr., Reno, Nevada
Richard E. Eckert Jr.
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr., Reno, Nevada
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Abstract

Emergence of 23 medusahead (Taeniatherum asperum (Sim.) Nevski) selections from four seeding depths in two soils was investigated and compared with that of other grasses. Increased depth markedly reduced total emergence of medusahead and variability among selections. Selections of intermediate wheatgrass (Agropyron intermedium (Host) Beauv) and pubescent wheatgrass (Agropyron trichophorum (Link) Richt.) and downy brome (Bromus tectorum L.), among other grasses, greatly exceeded medusahead in emergence from all depths. Standard crested wheatgrass (Agropyron desertorum (Fisch. ex Link) Schult.) had less emergence than medusahead from all depths. The 3 and 4-inch planting depths exceeded the coleoptile length of medusahead. When medusahead emerged from these depths, the first true leaf was recurved and chlorotic.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 3 , July 1969 , pp. 376 - 379
Copyright
Copyright © 1969 Weed Science Society of America 

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References

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