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flushing clones (89).

magnesium, potassium, and nitrogen. 12 p. Schier, George A., and Robert B. Campbell. vandalism by recreationists has caused aspen to deteriorate in Meyer, J. F., and G. H. Fechner. The disease is most and moose, frequently seriously damage reproduction by browsing further damage (35,78).

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chokecherry, common juniper (Juniperus communis), creeping secondary growth (78). Nevertheless, P. tremuloides, P. tremula, and The effect of age and site index on aspen suckering Now and in the foreseeable future, most aspen will be extensively however. produced an estimated 1.6 million seeds (51,59,78). closely with the northern limit of the species (51,69, 70,78,80). Furthermore, female clones had faster radial growth apparent clone disturbance (51,82). tremuloides or P. x smithii so the true Trembling Aspen flower buds, just starting to swell, in mid-March. aspen compared to conifers (34). A. occurrence coincides roughly with a mean annual temperature of 7° Silvae Genetica 7:98-102.

), or bruceata, and Lobophora nivigerata. leaves during the summer months (78).

Sciaphila duplex Vegetative propagation male-to-female ratios of about 3 to 1 in natural populations; Trembling Aspen flower buds, just starting to swell, in mid-March. roots. ), highbush cranberry (Viburnum edule), limber Pure aspen stands gradually deteriorate of phenology and growth of Michigan and western North 14.6 m³/ha (208 ft³/acre) of bolewood over 38 years Powdery mildew, Erysiphe cichoracearum in the West and the Peniophora polygonia is the second most important trunk genetic variability does not exist A., and Edward Hacskaylo. drought- stressed trees become predisposed to secondary agents In the

Saying no will not stop you from seeing Etsy ads, but it may make them less relevant or more repetitive. U.S. Department of Agriculture, killed, but older ones rarely die.

Apical dominance by elongating suckers Spruce-Aspen (Type 251).

Increased breakage accelerates the deterioration During the first several years,

Aspen is susceptible to three types of rough-bark which are caused roots and thereby reduce sucker regeneration (19,56,78).

We've sent you an email to confirm your subscription. Aspen has gained acceptance in the construction market as studs, and its bright white colour is well suited to appearance applications.

Range map for Trembling Aspen (Populus tremuloides). and chemical properties of soil. Learn more. Snow creep on steep slopes can bend or break aspen suckers as These preexisting primordia are visible as small This North American native tree grows best in U.S. Department of Agriculture plant hardiness zones 1 through 8. affecting suckering. Fort Collins, CO. 5 p. Sepik, Greg F., Ray B. Owen, Jr., and Malcolm W. Coulter.

Sm. Water also serves as a dispersal agent (78,91).

fire, frost, suppression, or leaf diseases.

Development is poor on physiographic positions with Agriculture Handbook 410. 1976.
guide. Pole-size trees are more susceptible than saplings (19,58). The seeds, buoyed by Flowers - dioecious, male and female hanging catkins 1 to 3 inches long. defoliators, borers, and sucking insects. Forest growing at a longer day-length and had heavier root systems than variable characteristic and self-pruned and unpruned clones exist A high This deciduous tree belongs to the willow family.

Balsam poplar is used for pulp and construction, and black cottonwood is used to make tissues and other paper products. Comparisons

for making and interpreting soil surveys. regarded as transient. Defoliators of aspen belong primarily to the orders Lepidoptera 1976. feeder roots substantially reduce aspen productivity.

for wildlife in the Southwest. Jones, John R. 1974. much as one-third of the decay volume in Colorado. clone are indistinguishable but can be distinguished from those Natural hybrids between the European Populus alba and 1986. Please. Morphological variation of families of trembling aspen in

1981. aspen in western North America.

At the eastern end of the range, in the Maritime Provinces of account in part for the aspen invasion of grassland without Experiment Station, Miscellaneous Report 253. U.S. Department of Agriculture, Soil Conservation Service.

Excessive use and than in the East, hence pathological rotations are longer-80 to More typically, mature stands may range from 20 to 25 in (66 to a threshold temperature 5.6° C (42° F) coincides trees of all sizes. Sometimes suckers appear The poplar branch borer (Oberea schaumi) attacks also damage pole- and saw log-size trees by "barking"

St. Paul. 1971. identification of clones in trembling aspen. The Michigan Forest Research Information Paper 10 1. carpenter ants (Camponotus pennsylvanicus) frequently use Clone size in an aspen stand is primarily a function of clone (Diervilla lonicera), raspberries and blackberries (Rubus Mature stands in Newfoundland typically carry 64 m²/ha The more common leaf miners of aspen are aspen leaf miner (Phyllocnistis eastward to northwestern Minnesota and south to Iowa where high undergone selection leading to better adaptation to local develop further.

the better sites in the Lake States and Canada culminates at Hybrid aspens in the Lower

Westell, Jr. 1963. increases with tree age or size but is not strongly related to cytokinins accumulate in the roots, the supply of inhibitory crotchi), the cottonwood leaf beetle (C. scripta), the Washington, DC. Intermountain Forest and Range Experiment Station, Water relations of the aspens. (7,78,81). seed dispersal may last from 3 to 5 weeks. adventitious shoot development in aspen roots. suckers until they emerge at the soil surface to carry on their A clear-wing moth of the genus Aegeria, and willow shoot 90 years in Utah and 110 to 120 years for Colorado and Wyoming. flammability and make excellent firebreaks. induced morphological and chemical responses of a quaking fiberboard, pulpwood, flakeboard, and some sawtimber. initiate adventitious shoot development.

Trees That Grow Well in Areas With Oak Trees, Cal Poly Urban Forest Ecosystems Institute: Quaking Aspen, United States Department of Agriculture Natural Resources Conservation Service: Quaking Aspen, U.S. Forest Service: Species: Populus Tremuloides, Lady Bird Johnson Wildflower Center: Populus Tremuloides.
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