Canadian Journal of Forest Research
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Magnesium deficiency symptoms associated with sugar maple dieback in a Lower Laurentians site in southeastern Quebec Observations made in 1987 on sugar maple (Acersaccharum Marsh.) dieback in the deciduous forest of the Lower Laurentians, northwest of Quebec City, revealed the occurrence of magnesium deficiency in various sites. Visual foliar symptoms observed on sugar maple in a severely declining stand growing on well-drained, stony, loamy-sand soil of granitic origin are briefly described and illustr... ...
Canadian Journal of Forest Research - Tập 18 Số 10 - Trang 1265-1269 - 1988
Phosphorus-fixing potential of Ah and H horizons subjected to acidification Invitro experiments on acidification of Ah and H horizons of soils originating from sugar maple (Acersaccharum Marsh.) stands in the Quebec Appalachians revealed that the amount of phosphate released to water by H horizons was not limited by acidification, while the phosphorus-fixing capacity of Ah horizons in the presence of added soluble phosphate increased linearly with increasing acid... ...
Canadian Journal of Forest Research - Tập 19 Số 1 - Trang 132-134 - 1989
Windthrow hazard modelling in boreal forests of black spruce and jack pine In this study we compare the mechanical resistance of black spruce (Picea mariana (Mill.) BSP) and jack pine (Pinus banksiana Lamb.) and quantify the effect of species, forest cover type, and soil conditions on tree stability. To measure tree resistance to an applied load, 85 trees were pulled over using a cable and winch system. Predictive equations for the maximum turning moment that a ... ...
Canadian Journal of Forest Research - Tập 35 Số 11 - Trang 2655-2663 - 2005
Complete chloroplast genome sequence of the avocado: gene organization, comparative analysis, and phylogenetic relationships with other Lauraceae
Canadian Journal of Forest Research - Tập 46 Số 11 - Trang 1293-1301 - 2016
A New Index Representing Individual Tree Competitive Status A new competition index, modified Area Potentially Available (APA), was tested in a complex unevenaged stand composed of 19 different hardwood species. APA considers tree size, spatial distribution, and distance relationships in quantifying intertree competition and exhibits a strong correlation with individual tree basal area growth. The most important characteristic of APA is its potent... ...
Canadian Journal of Forest Research - Tập 3 Số 4 - Trang 495-500 - 1973
Response of forage yield and quality to thinning and fertilization of young forests: implications for silvopasture management Integration of trees with forage and livestock production (silvopastoralism) could increase productivity of forest and range resources in western North America. Pre-commercial thinning (PCT) and fertilization are two silvicultural practices that could enhance silvopasture. We tested two hypotheses (H): that yield and quality of forage would be enhanced by (H1 ) heavy t... ...
Canadian Journal of Forest Research - Tập 44 Số 4 - Trang 281-289 - 2014
A calibrateable site index model for Pinus kesiya plantations in southeastern Africa The aim of the study was to develop a site index model for Pinus kesiya Royle ex Gordon plantations in southeastern Africa based on the relationship between the dominant height and stand age. Conversely, analysis of dominant height and age data showed that the growth patterns of plantations were different. In addition, the asymptotes and forms of standwise dominant height curves varied wi... ...
Canadian Journal of Forest Research - Tập 32 Số 11 - Trang 1916-1928 - 2002
Effects of ontogeny and soil nutrient supply on production, allocation, and leaf area efficiency in loblolly and slash pine stands The effects of ontogeny and soil nutrient supply on aboveground biomass accumulation, allocation, and stemwood growth efficiency of loblolly (Pinus taeda L.) and slash pine (Pinus elliottii Engelm. var. elliottii) were investigated in north-central Florida over 16 years using a 2 × 2 × 2 factorial experiment (species, fertilization, weed control). Aboveground biomass growth responses to t... ...
Canadian Journal of Forest Research - Tập 30 Số 10 - Trang 1511-1524 - 2000
The effect of variable-retention riparian buffer zones on water temperatures in small headwater streams in sub-boreal forest ecosystems of British Columbia Stream temperature impacts resulting from forest harvesting in riparian areas have been documented in a number of locations in North America. As part of the StuartTakla FisheriesForestry Interaction Project, we have investigated the influence of three variable-retention riparian harvesting prescriptions on temperatures in first-order streams in the interior sub-boreal forests of norther... ...
Canadian Journal of Forest Research - Tập 33 Số 8 - Trang 1371-1382 - 2003
Using salvage logging and tolerance to risk to reduce the impact of forest fires on timber supply calculations It is acknowledged that natural forest fires cannot and even should not be eliminated from the North American boreal forest. Forest fires produce immediate losses of wood volume, disrupt the conversion of the actual forest age structure into a target structure, and prevent planned timber supply (PTS) levels from being achieved. In this paper, we explore the extent to which periodic shortf... ...
Canadian Journal of Forest Research - Tập 45 Số 4 - Trang 480-486 - 2015
Tổng số: 166
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