Skógræktarritið - 15.12.1998, Side 67

Skógræktarritið - 15.12.1998, Side 67
heimildir Aradóttir, Á.L., Thorgeirsson, H., McCaughey, J.H., Strachan, I.B. & Robertson, A. 1997. Estabiishment of a black cottonwood plantation on an exposed site in Iceland: plant growth and site energy balance. Agric. For. Meteorol. 84: 1-9. Beals, E.W. 1966. Vegetation of Cottonwood Forests on Kodiak Island. Can. Field Naturalist 80: 166-171. Bradley, C. E.; Smith, D. G. 1986. Plains cottonwood recruitment and survival on a prairie meandering river floodplain, Milk River, southern Alberta and northern Montana. Can. J. Bot. 64: 1433-1442. Burns, R.M. and Honkala.B.H. (technical coordinators). 1990. Silvics of North America. 2. Hard- woods. Agricultural Handbook 654. USDA Forest Service, Washington, D.C., Voi. 2, bls. 570-576. Chapin, F.S., III, Walker, L.R., Fastie, C. L. & Sharman, L.C. 1994. Mechan- isms of Primary Succession following Deglaciation at Glacier Bay, Alaska. Ecol. Monographs 64: 149-175. Davies, R.J. I987a. Black polythene mulches to aid tree establishment. Arboricuiture Research Note 71/87/ARB. DoE Arboricultural Advisory and Information Service, Forestry Commission. Davies, R.J. I987b. Sheet mulches: suitable materials and how to use them. Arboriculture Research Note 72/87/ARB. DoE Arboricultural Advisory and Information Service, Forestry Commission. Heilman, P.E., Stettler, R.F., Hanley, D. P. & Carkner, R.W. 1990. High Yield Hybrid Poplar Plantations in the Pacific Northwest. A Pacific Northwest Extension Publication, PNW 356, 32 bls. Hreinn Haraldsson. 1981. The Markar- fljót Sandur Area. Striae, Vol. 15. Jobling, J. 1990. Poplars for Wood Production and Amenity. Forestry Commission Bulletin 92. 82 bls. lóhannes Árnason. 1992. Athuganir á klónum Alaskaaspar á Akureyri. Fjölrit. 8 bls. Kennedy, H.E., Jr. 1985. Cottonwood: An American wood. FS-231. Was- hington, DC: U.S. Department of Agricuiture, Forest Service. 8 bls. Krajina, V.)., Klinka, K. & Worrall, J 1982. Distribution and ecological characteristics of trees and shrubs of British Columbia. Vancouver, BC: University of British Columbia, Department of Botany and Faculty of Forestry. 131 p. Langhammer, Aa. og Lien, K.R. 1971. Treslag - omlopstider - produksjon. Norsk Skogbruk 17 (13/14 og 15/16). Lentner, M. & Bishop, T. Experimental Design and Analysis. Valley Book Company, Blacksburg, VA. Levitt, J. 1980. Responses of Plants to Environmental Stresses: Chilling, Freezing and High Temperature Stresses, ed. 2.1, Academic Press, New York. Líneik Anna Sævarsdóttir og Úlfur Ósk- arsson. 1990. Ættbók alaskaaspar á íslandi. I: Safnið frá 1963. Rann- sóknastöð Skógræktar ríkisins, Rit 4(10), 29 bls. Maini, J. S. 1968. Silvics and ecology of Populus in Canada. ln: Maini, J. S. & Cayford, J. H., eds. Growth and utili- zation of poplars in Canada. Depart- mental Publication No. 1205. Ottawa, Ontario, Department of For- estry and Rural Development: 20-69. Minore, Don. 1979. Comparative aute- cological characteristics of north- western tree species—a literature review. Gen. Tech. Rep. PNW-87. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 72 bls. Myers, C.C. & Buchman, R.G. 1984. Manager’s handbook forelm-ash- cottonwood in the North Central States. Gen. Tech. Rep. NC-98. St. Paul, MN: U.S. Department of Agri- culture, Forest Service, North Central Forest Experiment Station. 11 p. Parfitt, R.l. & Stott, K.G. 1984. Effects of mulch covers and herbicides on the establishment, growth and nutrition of poplar and willow cuttings. Aspects Appl. Biol. 5: 305-313. Radwan, M. A., Kraft, J. M. & DeBell, D. S. 1987. Bud characteristics of unrooted stem cuttings affect esta- blishment success of cottonwood. PNW-461. Portland, OR: USDA Forest Service, Pacific Northwest Forest and Range Experiment Station. 8 bls. Shulte, P. G., Hinkley, T. M. & Stettler, R. F. 1987. Stomatal responses of Populus to leaf water potential. Can. J. Bot. 65: 255-260. Smith, J.H.G. 1957. Some factors indicative of site quaiity for black cottonwood (Populus trichocarpa Torr. & Gray). J. Forestry 55: 578-580. Truax, B. and Gagnon, d. 1993. Effects of straw and black plastic mulching on the initial growth and nutrition of butternut, white ash and buroak. For. Ecol. Manage. 57: 17-27. Úlfur Óskarsson. 1990. Leiðbeiningar um hraðfjölgun á Alaskaösp með smágræðlingum. Rit Rannsókna- stöðvar Skógræktar ríkisins 4(1), x bls. Veðráttan: Skýrslur Veðurstofu íslands frá ýmsum árum. Viereck, L.A. & Little, E.L., Jr. 1972. Alaska Trees and Shrubs. USDA Forest Service Agric. Hb. No. 410, 265 bls. Walker, L.R. 1993. Nitrogen fixers and species replacements in primary succession. í: Miles, J. & Walton, D.W.H. (ritstj.J, Primary Succession on Land, Blackwell Scientific Publications, bls. 249-272. Walker, R.F. & McLaughlin, S.B. 1989. Black polyethylene mulch im- proves growth of plantation-grown loblolly pine and yellow-poplar. New Forests 3: 265-274. White, G.C. and Holloway, R.l.C. 1967. The influence of simazine or a straw mulch on the establish- ment of apple trees in grassed down orcultivated soil. J. Hortic. Scie. 42: 377-389. Þorbergur Hjalti Jónsson. 1985. Vaxtarmælingar á ösp. Greinargerð til skógræktarstjóra vegna vaxtar- mælinga fyrir mat á arðsemi skóg- ræktar á fslandi. Óbirt handrit. 5 bls. Þorbergur Hjalti Jónsson og Kristján Þórarinsson. 1990. Tilraun með skjólbeltarækt á sandi 1: Áhrif plastþekju á lff og vöxt víði- plantna. Rit Rannsóknastöðvar Skógræktar ríkisins 4(7). 16 bls. Þórarinn Benedikz. 1991. Stærð ýmissa trjátegunda á íslandi. Skógræktarritið 1991: 65-69. SKÓGRÆKTARRITIÐ 1998 65
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