Zobrazeno 1 - 10
of 27
pro vyhledávání: '"G. W. Edwards"'
Publikováno v:
Canadian Journal of Botany. 83:1478-1487
Garry oak ( Quercus garryana Dougl. ex Hook) has a long north–south distribution along the inland Pacific coast. In British Columbia, it is a keystone species in a unique and endangered “Garry oak meadow” ecosystem. Here, we apply isozyme marke
Autor:
Yousry A. El-Kassaby, D. G. W. Edwards
Publikováno v:
Forest Ecology and Management. 144:183-188
The effect of variable heat sums (440, 400, 320 and 280° h days), expressed as alternating temperatures (25/15, 20/15, 20/10 and 15/10°C over 8/16 h (day/night) regimes), and various stratification treatments (0, 4, 8 and 12 weeks) and their intera
Autor:
Yousry A. El-Kassaby, D. G. W. Edwards
Publikováno v:
Forest Ecology and Management. 112:203-211
Genetic control of germination parameters and the effects of accelerated aging in mountain hemlock (Tsuga mertensiana [Bong.] Carr.) seeds were investigated using standard germination tests and simulated aging, respectively. Germination parameters we
Autor:
Y. A. El-Kassaby, D. G. W. Edwards
Publikováno v:
The Forestry Chronicle. 72:481-484
The biological impact of forest tree reproductive processes and the extent of management practices of seed orchards and nurseries on the genetic representation of new forests, are discussed in a holistic fashion. All the steps in tree reproduction, t
Publikováno v:
New Forests. 8:81-87
No statistically-significant effects of size (small and large) of wind-pollinated seeds from 18 seed-orchard clones could be found in the attributes of 8-month-old seedlings of Sitka spruce (Picea sitchensis (Bong.) Carr.). Clonal variations in seedl
Publikováno v:
New Forests. 5:327-334
Douglas-fir seedlots were treated with the Incubation Drying Separation (IDS) method to test whether seeds infested with the seed chalcid, Megastigmus spermotrophus Wachtl, could be separated from non-infested seeds. Seeds were soaked in distilled wa
Publikováno v:
New Forests. 4:137-146
Overhead-cooling treatment used to delay flowering produced non-significant effects on germination capacity, germination rate, germination value, and abnormal germination of seeds from a 13-year-old Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco]
Publikováno v:
Transactions of the ASAE. 18:0707-0710
Autor:
G. W. Edwards, P. J. Cloke
Publikováno v:
Planning Outlook. 26:14-17
Autor:
S F Cotgrove, K Woods, J Eyles, M Harloe, J Whitelegg, G L Clark, G W Edwards, P Williams, H D Watts, T O'Riordan, R Sadler
Publikováno v:
Environment and Planning A: Economy and Space. 17:279-292