Ráðunautafundur - 15.02.1989, Side 41

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Rice, R.W., 1986. Models as a tool in grazing management. í Grazing Research at
Northern Latitutes (ritstj. Ólafur Guðmundsson). Plenum Press, NATO ASI series A:
Life Sciences Vol 108: 291-299.
Richards, J.H., 1986. Plant response to grazing: The role of photosynthetic capacity
and stored carbon reseves. í Rangelands: A Resource under Siege. Proceedings of
the Second International Rangeland Congress. Cambridge University Press,
Cambridge: 428-430.
Richards, J.H. & Caldwell, M.M., 1985. Soluble carbohydrates, concurrent
photosynthesis and efficiency in regrowth following defoliation: A field study with
Agropyron species. Journal of Applied Ecology 22: 907-920.
Sanders, J.O. & Cartwright, T.C., 1979a: A general cattle production system model. I:
structure of the model. Agricultural Systems 4: 217-227.
Sanders, J.O. & Cartwright, T.C., 1979b: A general cattle production system model.
Part 2-Procedures used for simulating animal performance. Agricultural Systems 4:
289-309.
Senft, R.L., 1988. Short-duration grazing on crested wheatgrass (Agropyron
desertorum): Effects of grazing system variables on cattle and herbage production.
Agricultural Systems 28: 189-211.
Snjólfur Ólafsson, Sigrún Helgadóttir, Helgi Þórsson, & Hólmgeir Björnsson, 1988.
Litiö orbasafn úr tölfrœði. Raunvísindastofnun Háskólans, Reykjavík.
Thorgeirsson, H. & Richards, J.H., 1989. The dynamics of respiratory carbon use and
of labile carbon during regrowth following defoliation. í handriti.
Thorsteinsson, I., 1986. The effect of grazing on stability and development of
northern rangelands: A case study of Iceland. í Grazing Research at Northern
Latilutes (ritstj. Ólafur Guðmundsson). Plenum Press, NATO ASI series A: Life
Sciences Vol 108: 37-43.
Wight, J. & Skiles, J.W. (ritstj.) 1987. Simulation of Production and Utilization of
Rangelands. Documentation and User Guide. U.S. Department of Agriculture,
Agricultural Research Service, ARS 63.