Íslenskar landbúnaðarrannsóknir - 01.09.1982, Side 70

Íslenskar landbúnaðarrannsóknir - 01.09.1982, Side 70
68 ÍSLENZKAR LANDBÚNAÐARRANNSÓKNIR Oregon. United States Department of Agricul- ture, Forest Service Research Paper PNW-40, 46 p. Tieszen, L.L., and Archer, S. 1979. Physiological responses of plants in tundra grazing systems. In D. A. Johnson, ed., Special management needs of alpine ecosystems. Range Science Series Number 5, Society for Range Management, Denver, p. 22-42. Thilenius,}. F. 1975. Alpine range management in the western United States — principles, prac- tices, and problems: The status of our know- ledge. United States Department of Agriculture, Forest Service Research Paper RM-157, Rocky Mountain Forest and Range Experiment Sta- tion, Fort Collins, Colorado, 32 p. Thorsteinsson, I., Olafsson, G., and Van Dyne, G. M. 1971. Range resources of Iceland. Journal of Range Management 24:86-93. Tikhomirov, B. A. 1959. Relationship of the animal world and the plant cover of the tundra. Botani- cal Institute, Academy of Sciences, USSR, 87 p. [Tanslated by E. Issakoff and T. W. Berry, Boreal Institute, University of Alberta.] Trlica, M. J., Buwai, M., and Menke, J. W. 1977. Eífects of rest following defoliation on the recov- ery of several range species. Journal of Range Management 30:21-27. Trlica, M. J., and Singh, J. S. 1979. Translocation of assimilates and creation, distribution, and utilization of reserves. In R. A. Perry and D. W. Goodall, eds., Arid-land ecosystems: Structure, functioning, and management. Volume I. International Biological Programme 16, Cam- bridge University Press, Great Britain, p. 537- 571. Troughton, A. 1957. The underground organs of herbage grasses. Commonwealth Bureau of Pas- tures and Field Crops, Hurley, Berkshire, Bulle- tin Number 44, 163 p. Vallentine, J. F., Cook, C. W., and Stoddart, L. A. 1963. Range seeding in Utah. Utah Agricultural Extension Service Circular 307. Vickery, P. J. 1972. Grazing and net primary production of a temperate grassland. Journal of Applied Ecology 9:307-314. Ward, C. Y., and Blaser, R. E. 1961. Carbohy- drates, food reserves, and leaf area of regrowth of orchardgrass. Crop Science 1:366-370. Webber, P. J. 1974. Tundra primary productivity. In J. D. Ives and R. G. Barry, eds., Arctic and alpine environments. Methuen, London, p. 455-473. Webber, P. J. 1977. Belowground tundra research: A commentary. Arctic and Alpine Research 9:105-111. Webber, P. J., and May, D. E. 1977. The distribu- tion and magnitude of belowground plant struc- tures in the alpine tundra of Niwot Ridge, Colorado. Arctic and Alpine Research 9:157— 174. West, N., and Gasto, J. 1978. Phenology of the aerial portions of shadscale and winter fat in Curlew Valley, Utah. Journal of Range Man- agement 31:43-45. White, L. M. 1973. Carbohydrate reserves of grasses: A review. Tournal of Range Manage- ment 26:13-18. Wietgplaski, F. E. 1972. Vegetation types and plant biomass in tundra. Arctic and Alpine Research 4:291-306. Younger, V. B. 1972. Physiology of defoliation and regrowth. In V. B. Younger and C. M. McKell, eds., The biology and utilization of grasses. Academic Press, New York,.p. 292—303.

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