Relevant bibliographies by topics / British Honduran Forestry Unit

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Academic literature on the topic 'British Honduran Forestry Unit'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 July 2024

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Journal articles on the topic "British Honduran Forestry Unit"

1

Murray, Nancy. "Book reviews : Many Struggles: West Indian workers and service personnel in Britain (1939-45) By MARIKA SHERWOOD (London, Karia Press, 1985). 137 pp. Telling the Truth: the life and times of the British Honduran Forestry Unit in Scotland (1941-44) By AMOS A. FORD (London, Karia Press, 1985). 96pp. 'I Think of My Mother': notes on the life and times of Claudia Jones By BUZZ JOHNSON (London, Karia Press, 1985). 194pp." Race & Class 27, no. 1 (1985): 97–99. http://dx.doi.org/10.1177/030639688502700107.

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2

Rouck, K. B., and J. D. Nelson. "Timber supply and economic impacts associated with sustained yield unit size." Forestry Chronicle 71, no. 5 (1995): 647–56. http://dx.doi.org/10.5558/tfc71647-5.

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Partitioning the forest into sustained yield units is a complex task that involves assessing timber supply, allocation of cutting rights, and social, economic, and environmental impacts. There are numerous ways to vary the timing and intensity of harvests within individual drainages while still meeting the objectives of sustained yield. In this paper we use a spatial forest planning model to examine economic and environmental implications of varying the sustained yield unit size. Harvests for a Timber Supply Area in British Columbia are calculated using 4 sizes of sustained yield units: 1)12 small units, 2) four moderately sized units 3) two large units, and 4) one unit representing the entire forest. Relative to the 12 small units, short-term (20 year) harvest levels for the Timber Supply Area increased by 7.6%, 10%, and 10.8% for the 4, 2 and 1 unit aggregations, respectively. Medium-(21-60 years) and long-term (61-120 years) increases in harvest levels averaged approximately 75% and 40%, respectively, of those realized in the short-term. Reductions in the length of active road and delivered wood costs were also observed as sustained yield units increased in size. Small units often restrict short-term timber supply and provide continuous road access to important wildlife habitat. While larger units afford greater flexibility in meeting short-term harvests, the intensity of the harvest within individual drainages increases. However, with large units the inactive drainages can be closed for extended periods, thus limiting human access to the active drainages. Key words: timber supply, sustained yield unit size, spatial modelling, economics
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3

Wilkins, i. V. "THE CRIOLLO CATTLE PROJECT OF THE BRITISH TROPICAL AGRICULTURAL MISSION AND EL CENTRO DE INVESTIGACION AGRICOLA TROPICAL AS A MODEL OF INVESTIGATION AND DEVELOPMENT." Animal Genetic Resources Information 7 (April 1990): 7–10. http://dx.doi.org/10.1017/s1014233900002947.

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The British Tropical -Agricultural Mission (BTAM) is a unit of the overseas Development Administration and consists of a group of eight to ten specialists in the fields of soil management, agronomy, plant protection, sociology, ecology, economics, animal production, pasture production and agro-forestry, working in a supportive and training capacity with the Bolivian Centro de Investigaci6n Agricola Tropical (CIAT), since its formation in 1976.
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4

Lindroos, Ola, Björn Nilsson, and Taraneh Sowlati. "Costs, CO2 Emissions, and Energy Balances of Applying Nordic Slash Recovery Methods in British Columbia." Western Journal of Applied Forestry 26, no. 1 (2011): 30–36. http://dx.doi.org/10.1093/wjaf/26.1.30.

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Abstract This study evaluated the costs, CO2 emissions, and energy balances associated with three potential systems for recovering roadside slash in British Columbia, Canada, in which the biomass is transported as slash, hog fuel, or bundles. Costs, CO2 emissions, and energy balances of all three systems showed strong dependence on transportation distance and considerably weaker dependence on slash amounts at landing (cutting block size). The results indicated that the hog fuel system is the cheapest, per unit of delivered biomass, whereas the bundle system is the most expensive system when transportation distances are short (<100 km), and the slash system is the most expensive when transportation distances exceed 100 km. However, the viability of the systems is strongly dependent on payload assumptions.
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5

Johnstone, Wayne D. "The Effects of Juvenile Spacing on 7-Year-Old Lodgepole Pine in Central British Columbia." Western Journal of Applied Forestry 20, no. 3 (2005): 160–66. http://dx.doi.org/10.1093/wjaf/20.3.160.

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Abstract The effects of spacing 7-year-old second-growth lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.) are reported 20 growing seasons after treatment. Five spacing levels of 500, 1,000, 1,500, 2,000, and 2,500 trees per hectare, plus unspaced controls, were established on plots in central British Columbia. Both individual-tree and per-hectare data were analyzed. Spacing had a significant effect on all of the individual-tree characteristics examined, but its effect on per-hectare values was mixed. Although this report only provides short-term information on the effects of juvenile spacing on the growth and yield of lodgepole pine, it does indicate the need to optimize individual-tree growth rates with levels of growing stock to maximize yield per unit area. West. J. Appl. For. 20(3):160–166.
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6

Martin, Patrick J., Shane Browne-Clayton, and Eleanor McWilliams. "A results-based system for regulating reforestation obligations." Forestry Chronicle 78, no. 4 (2002): 492–98. http://dx.doi.org/10.5558/tfc78492-4.

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A results-based system for the regulation of reforestation obligations is described. The system involves establishing performance targets for harvested areas, surveying areas after harvest to assess achieved performance, and maintaining a ledger to tally target and achieved performance over a large number of cutblocks. The obligation to reforest is considered met when total achieved performance exceeds total target performance evaluated over all cutblocks. Reforestation performance is indexed by predicted merchantable volume per hectare 80 years after harvest. To obtain these volume predictions, areas are surveyed 10 years after harvest and estimates of site quality, tree stocking, species composition, and stand height are input to a set of yield prediction tables. This results-based system, which we believe improves the regulatory framework governing the reforestation of harvested areas, will be tested in a management unit (TFL 49) in southern British Columbia in 2002. Key words: results-based regulations, reforestation, yield prediction, silviculture
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7

Patterson, David W., Jonathan I. Hartley, and Matthew H. Pelkki. "Size, Moisture Content, and British Thermal Unit Value of Processed In-Woods Residues: Five Case Studies." Forest Products Journal 61, no. 4 (2011): 316–20. http://dx.doi.org/10.13073/0015-7473-61.4.316.

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8

Kamaluddin, Mohammed, Scott X. Chang, Michael P. Curran, and Janusz J. Zwiazek. "Soil Compaction and Forest Floor Removal Affect Early Growth and Physiology of Lodgepole Pine and Douglas-Fir in British Columbia." Forest Science 51, no. 6 (2005): 513–21. http://dx.doi.org/10.1093/forestscience/51.6.513.

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Abstract We investigated the effects of soil compaction and forest floor removal on growth and physiology of lodgepole pine (Pinus contorta ex Loud. var. latifolia Engelm.) and Douglas-fir (Pseudotsuga menziesii var. glauca [Baissn.] Franco) seedlings on a calcareous long-term soil productivity (LTSP) study site near Invermere, British Columbia. Treatments consisted of factorial combinations of soil compaction (noncompacted versus compacted) and forest floor removal (forest floor intact versus forest floor removed) as well as a remedial (rehabilitation) treatment of deep ripping following soil compaction. The experiment was not replicated at the treatment plot level, therefore no statistically based mean comparisons were made. After two growing seasons, we found that the two tree species responded differently to those treatments. Lodgepole pine height and diameter growth and unit needle-weight (dry mass per unit needle) averaged 25, 51, and 30% greater, respectively, in the rehabilitation than in the other treatments, whereas Douglas-fir responded to the rehabilitation treatment by increasing stem diameter growth by 27%, but not height growth (a change of 9%). Forest floor removal decreased height growth in lodgepole pine by 11%, but increased diameter growth in Douglas-fir by 15%. The decreases in growth for lodgepole pine in the forest floor removal treatments were accompanied by lower foliar N concentrations. Foliar N concentrations were positively correlated with rates of net photosynthesis (r = 0.69, P = 0.004) and height growth (r = 0.76, P = 0.004) in lodgepole pine, but not in Douglas-fir. Low N supply (as observed for lodgepole pine) and depletion of soil moisture as a result of forest floor removal likely played a role in shaping the growth and physiological responses of the trees in this study. FOR. SCI. 51(6):513–521.
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9

Griess, Verena C., Rajat Panwar, and Julie Cool. "The potential of mixing timber assets to financially offset negative effects of deer browsing on western redcedar." Forestry Chronicle 91, no. 04 (2015): 436–43. http://dx.doi.org/10.5558/tfc2015-073.

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Western redcedar (WRC) is a highly desirable species in British Columbia's Coastal Western Hemlock zone, both from a management and a conservation perspective. However, it is also highly palatable for ungulates. Existing countermeasures against browsing all have high costs and imperfect results in common. We used the portfolio method to display how diversification can help to lower investment risk. Using risk-return ratios of a WRC and Douglas-fir (DF), we derived species portfolios that yield maximum financial return per unit of risk. Financial indicators were calculated based on Monte Carlo simulations, which consider timber price fluctuation and browsing risk. Results show how economic risks of a forest investment could be reduced by creating a species portfolio. The optimum portfolio leading to most beneficial risk-return combination is 75% WRC and 25% DF if browsing is lowered using protective measures that double planting costs; and 30% WRC and 70% DF if no protective measures are applied. Accordingly, the most desirable risk-return combination is that of a mixed-species forest, whereas the 2 species don't have to be grown in intimate mixtures. Our research sketches a path forward that can help to ensure WRC will remain an important asset in BC's timber portfolio.
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10

Maness, Thomas, and Ross Farrell. "A multi-objective scenario evaluation model for sustainable forest management using criteria and indicators." Canadian Journal of Forest Research 34, no. 10 (2004): 2004–17. http://dx.doi.org/10.1139/x04-075.

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A multi-objective optimization model was created for medium-term forest development planning for an integrated forest products company located in the East Kootenay area of British Columbia, Canada. First, a set of sustainable forest management criteria and indicators were developed based on information that could be collected from regional geographic information sytem (GIS) databases and potential outputs from the model. Next, a new forest development planning unit was created (stewardship unit) in which adjacent forest polygons with similar indicator attributes were aggregated. The planning model was designed to determine appropriate harvest levels and management treatments on each stewardship unit to satisfy objectives determined in a participatory process. The mathematical model uses a fuzzy MAXMIN approach, where each indicator represents an objective in the model. Indicators are valued in the model using targets, thresholds, and triggers (called the 3-T approach). A case study is used to demonstrate the use of the model in a sustainable forest development planning context. The results of the case study show that the planning area is highly sensitive to visual quality, old-growth, and community watershed indicators. The paper concludes with a sensitivity analysis that determines the relative opportunity cost of various sustainable forest management indicators on company profits, employment, and tax revenues.
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Books on the topic "British Honduran Forestry Unit"

1

Ford, Amos A. Telling the truth: The life and times of the British Hondinan Forestry Unit in Scotland (1941-44). Karia Press, 1985.

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2

King, Tom. Managing our natural wealth: A unit on natural resources with a focus on forestry, fishing and mining in British Columbia. Critical Thinking Consortium, 2003.

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3

Telling the Truth: The Life and Times of the British Honduran Forestry Unit in Scotland. Karia Press, 2001.

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4

Telling the truth: The life and times of the British Honduran Forestry Unit in Scotland (1941-44). Karia Press, 1985.

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