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Effect of Nitrogen on Yield of Forage of Eight Grasses Grown in High Altitude Meadows of Wyoming¹

Sypnosis: Effects of 0, 80, and 160 pounds nitrogen per acre on forage production and percentage crude protein of eight seeded grass species and varieties in a high altitude meadow near Pinedale, Wyoming were studied. Coinmon, Lincoln and Manchar bromegrass, orchardgrass, timothy, intermediate wheatgrass, meadow foxtail and Reed canarygrass were studied. Variations in species and variety response to nitrogen were noted. However, significant increases in forage production and percentage crude protein were obtained for all eight grasses.

² Soil Scientist, Western Soil and Water Management Section, Soil and Water Conservation Research Branch, A.R.S., U.S.D.A. and Associate Agronomist, Wyoming Agr. Exp. Sta., respectively. The authors wish to express appreciation to Mr. O. A. Beath, Head, Department of Research Chemistry, who was responsible for analyzing the plant samples in 1954; and to Harold Bindschadler, State Soil Scientist, S. C. S., for describing the soil.

Received for publication January 5, 1957.