http://hdl.handle.net/10150/635702 Wed, 13 May 2026 13:39:19 GMT 2026-05-13T13:39:19Z http://hdl.handle.net/10150/650400 Journal of Range Management, Volume 23, Number 1 (January 1970) Complete digitized issue. Thu, 01 Jan 1970 00:00:00 GMT http://hdl.handle.net/10150/650400 1970-01-01T00:00:00Z http://hdl.handle.net/10150/649976 Use of Equations to Predict the Nutritive Value of Tropical Grasses Butterworth, M. H.; Diaz L., J. A. Literature values for the digestibility of tropical grass species were used to compute equations to predict apparent digestibility of crude protein and total digestible nutrients from proximate analyses. It was found that effective predictions could be obtained for the apparent digestibility of crude protein and that values varied considerably among individual grass species. Large differences were not found either among methods of preparation (i.e. silage, hay, fresh material) nor among species of animal used. The equations for TDN accounted for a minor part of the total variation and were of little value for prediction. The results are discussed in relation to the hypotheses underlying the various criteria used in the determinations. Thu, 01 Jan 1970 00:00:00 GMT http://hdl.handle.net/10150/649976 1970-01-01T00:00:00Z http://hdl.handle.net/10150/649973 Trampling Losses and Travel by Cattle on Sandhills Range Quinn, J. A.; Hervey, D. F. Trampling losses by cattle on sandhills range varied from about 1% of the grass herbage or 20 pounds per acre under light grazing to 5% or 60 pounds per acre with heavy grazing. The various sandhill grasses differed in their susceptibility to trampling in July and September. In lightly grazed 50-acre pastures, yearling cattle averaged 1.5 miles of travel per day compared to 2.0 in moderate and heavily grazed pastures. Thu, 01 Jan 1970 00:00:00 GMT http://hdl.handle.net/10150/649973 1970-01-01T00:00:00Z http://hdl.handle.net/10150/649975 Tundra Ranges North of the Boreal Forest Klein, D. R. Tundra rangelands of Alaska and northern Canada occupy about 200,000 and 900,000 square miles respectively. The tundra supports far lower numbers of large grazers than other natural areas, averaging less than 100 lb per square mile. Forage quality of tundra plants is high because of rapid growth and wide variation in seasonal progression of growth. The native grazers, caribou and muskoxen, have evolved rapid growth rates and selectively feed on the highest quality forage available. Wild populations of caribou and muskoxen appear to offer the best potential for conversion of tundra vegetation into commodities utilizable by man. Thu, 01 Jan 1970 00:00:00 GMT http://hdl.handle.net/10150/649975 1970-01-01T00:00:00Z