Skógræktarritið - 15.12.1998, Síða 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.
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