Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 January 1958
Published in Agron J 50:40-44 (1958)
© 1958 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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The Influence of Ammonium Nitrate on the Growth and Yield of Crested Wheatgrass on the Oregon High Desert1

Forrest A. Sneva, Donald N. Hyder2 and C. S. Cooper3

Synopsis: Spring yields of crested wheatgrass were more than doubled by application of 30 pounds per acre of N and were directly related to April and May temperatures but inversely related to the amount of fall and winter precipitation over a 4-year period. Annual yields were directly related to fertility rate, and to the amount of precipitation received in the preceding November 1 to June 1 period. Counting residual response, the 20 pounds per acre fertility rate returned 25 pounds of herbage per pound of N applied.

1 Contribution from the Squaw Butte-Harney Range and Livestock Experiment Station, Burns, Oregon, which is jointly operated by the Agricultural Research Service, U.S D.A. and Oregon Agr. Exp. Sta., Oregon State College, Corvallis, Oregon. Technical paper No. 1026, Oregon Agricultural Experiment Station.

2 Range Conservationists, Crops Research Division, A.R.S., U.S.D.A.

3 Agronomist, Crops Research Division, A.R.S., U.S.D.A.

Received for publication May 6, 1957.




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Environmental Quality		 The Plant Genome
Copyright © 1958 by the American Society of Agronomy.