Results 231 to 240 of about 389,564 (265)

Clonal Forestry in the Eucalypts

1993
The earliest operational use of rooted cuttings in plantations of forest trees was not with the eucalypts, since rooted cuttings were used over 100 years ago in Cryptomeria japonica (Ono 1882). This kind of regeneration has been common in plantations of Populus spp. and Salix spp. Currently, however, the largest operational clonal forestry programs are
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Organization and Implementation of a Clonal Forestry Program

1993
A successful large-scale operational clonal forestry program has evolved in eastern Ontario, Canada since 1975. The beginning of this program can be attributed to three main factors: (1) the demonstrated growth of improved hybrid poplar clones in field tests, (2) the developing wood supply shortage of a local pulp and paper mill, and (3) the ...
S. Strobl, R. W. Evers
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Implementation of Conifer Somatic Embryogenesis in Clonal Forestry: Technical Requirements and Deployment Considerations [PDF]

Annals of Forest Science, 2002
Mise en œuvre de l'embryogenèse somatique des conifères en foresterie multiclonale : exigences techniques et considérations sur son utilisation. Le clonage des arbres réalisé à l'aide de l'embryogenèse somatique (ES) pourrait avoir un impact majeur sur l'amélioration des arbres et la foresterie commerciale de plantation.
exaly   +3 more sources

Biotechnology and Clonal Forestry

1993
Traditionally, forests have been regenerated from seedlings derived from bulked seed collected in nature, or more recently from seeds collected from randomly pollinated plus-trees. In most of these forests there is a large variation in growth, form, and vigor. Besides, there are forest tree species that are characterized by poor and irregular seed set,
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Genetic variances among clonally propagated populations of tamarack and the implications for clonal forestry

Canadian Journal of Forest Research, 1987
Genetic variances of three tamarack (Larixlaricina (Du Roi) K. Koch.) populations in central New Brunswick were examined using vegetatively propagated materials. The component of variance due to clones within families was large for both 5-year height and survival and was partitioned into additive and nonadditive genetic variances.
Y. S. Park, D. P. Fowler
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Prospects for Clonal Forestry With Radiata Pine

Australian Forestry, 1984
Summary The advantages of vegetative propagation of forest trees are discussed. The history of the development of such techniques with radiata pine (Pinus radiata) is outlined and a new technique for mass propagation of cuttings of the species described. It is suggested large scale clonal plantations of this species are now possible.
F. B. Clarke, M. U. Slee
exaly   +2 more sources

Past, Present, and Anticipated Applications of Clonal Forestry

1993
Trees are among the few natural resources that can be renewed, and the need for trees and the wood that they provide is continuing to increase with increases in world population and the striving of peoples to maintain or increase their standards of living.
J. Kleinschmit, D. K. Khurana, H. D. Gerhold, W. J. Libby   +3 more
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Limit theorems and a general framework for risk analysis in clonal forestry

Mathematical Biosciences, 1997
Use of clonally propagated plantings in reforestation offers management advantages of phenotypic uniformity and high yields. Disadvantages include low genetic diversity and the possibility that the clone or clones chosen are particularly susceptible to attack by an insect or pathogen unforeseen as a problem at the time of clonal selection.
Bishir, John, Roberds, James
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Clonal Forestry with Yellow-Cedar

1993
Stecklings have been the major propagule type for the reforestation of yellow-cedar [Chamaecyparis nootkatensis (D. Don) Spach] over the past 15 years in British Columbia. Over 70% of the planting stock since 1975 has been Stecklings, and currently, one-half to three-quarters of a million Stecklings are planted annually.
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Strategies for Clonal Forestry with Poplars, Aspens, and Willows

1993
Poplars (species and interspecific hybrids of sections Aigeiros and Tacamahaca), aspens (Leuce poplars) and willows (Salix) exhibit a variety of useful morphological, anatomical, and physiological characteristics. Due to their fast growth and the fact that they may be planted on many and varied sites both in and out of forests, poplars, aspens, and ...
L. Zsuffa, L. Sennerby-Forsse, H. Weisgerber, R. B. Hall   +3 more
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