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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"stand density"”.
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Stand Density Management for Optimal Volume Production
The relationship between volume production and stand density, often termed the 'growth-density relationship', has been studied since the beginnings of forestry and yet no conclusive evidence about a general pattern has been established. Throughout the literature claims and counterclaims concerning …
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Forest Mortality in Lake Tahoe Basin from 1985-2010: Influences of Forest Type, Stand Density, Topography and Climate
… such as drought, and endogenous factors such as stand density and environmental setting have also been implicated (Allen et al. 2010). This study utilizes remote sensing imagery from the 1985-2010 Landsat Thematic Mapper archive to explore relationships among forest types, climate, stand density, …
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Hydrologic significance of stand density variations in Alberta lodgepole pine (Pinus contorta Dougl. (Moench) Voss. var. latifolia Engelm.) forests
… significance (if any) of variations in stand density, studies of snow accumulation, canopy interception of rainfall, and soil moisture, were undertaken in natural and previously thinned stands of lodgepole pine in west central Alberta. Secondary objectives dealt with precipitation …
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The Influence of Stand Density on Rate of Carbon Sequestration in Loblolly Pine Plantations on Mined Lands in East Texas
… determined the financially optimal planting density and management regimes for loblolly pine (Pinus taeda) planted on reclaimed mined lands and NIPF lands in East Texas given the objectives of maximizing revenue from timber production and the combination of timber production and carbon …
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Some effects of stand density on soil moisture in a red pine (Pinus Resinosa Ait.) plantation on grayling sand, gravelly phase, in Crawford County, Michigan
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science,
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Tall Fescue (Lolium arundinaceum (Schreb.) S.J. Darbyshire) Cultivar Performance in the Central California Coastal Region
… centimeters and evaluated plant quality based on stand density, leaf texture, and genetic plant color. In the first year of the study, although there were some differences, there were no continual patterns that proved one cultivar to be better or worst than the others. Lower mowing heights …
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An analysis of correlated curve trend experiments in Eucalyptus grandis
… estimates were described as functions of stand density. Growth attributes were used as moments of a probability density function to describe a diameter distribution model for the species. Time trends in the relationships between growth parameters and stand density were scrutinized with …
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Soil productivity model to assess forest site quality on reclaimed surface mines
… greater than premined conditions. Presently, the standard for evaluating reforestation success is based solely on tree-seedling survival. This method is an estimator of stand density and not an indication of site productivity. There exists a need to evaluate mine soils based on their capability of …
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The demography of Acacia stands on the Hluhluwe-Umfolozi Game Reserve
… The demographics and species composition of stands of four different Acacia species was investigated in the Hluhluwe-Umfolozi Game Reserve in northern Kwazulu-Natal in order to determine whether stands were self-replacing, or whether other Acacia species were invading them. Soil and stand …
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Laminated root rot: ecology relationship and stand productivity impacts in coastal Douglas-fir ecosystems of British Columbia
… (PSP's). The impact of Phellinus root rot on stand productivity was estimated from PSP records and a percent basal area reduction (%BAR) parameter estimate determined using variable-radius plot sampling. The methods involved ecological site characterization to Biogeoclimatic Ecosystem …
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Comparisons of crop yields using semi-organic and inorganic fertilizers
… the field trials.In the field trials a greater stand density was produced using the semi-organic fertilizer as compared with an inorganic fertilizer and no-fertilizer treatment. This difference was evident from early in the season and was therefore attributed to relative success in germination …
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Forest vegetation response to the application of municipal sewage sludge in the coastal western hemlock zone
… sludge was applied to Pseudotsuga menziesii stands of four different ages at the Malcolm Knapp Research Forest, British Columbia. The experiment consisted of two phases. Phase I was a preliminary small (100 m2) plot trial involving stands established in 1964, 1980, and 1986. Phase II stands …
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Chinese Tallow Long-Term Impact on Stand Dynamics in a Bottomland Hardwood Forest Following Vegetation Management
… examined Chinese tallow and native tree stand structure. Each native and Chinese tallow plot included three sets of nested subplots. The nested subplots include one overstory, one sapling, and four seedling subplots. R (v4.3.3) software was used to run repeated measures analysis of …
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An integrated system of stand models for loblolly pine
An integrated system of stand models was developed for loblolly pine in which models of different levels of resolution are related by a unified mathematical structure. A “telescoping'' system is presented in which a highly detailed overall model is specified and its components. ''collapsed" around …
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Past precipitation, watershed characteristics, and drought: interactive effects on watersheds of Northern California.
… soil type, vegetation composition, and stand age, are known to impact runoff through differences in evapotranspiration and storage. Drought may further change the hydrological function, or precipitation-runoff relationship of a watershed. In this study, I investigated how watershed …
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Sensitivity Analysis of the Forest Vegetation Simulator Southern Variant (FVS-Sn)for Southern Appalachian Hardwoods
… and untested model. These limitations notwithstanding, FVS-Sn once tested and validated could meet the critical need of a comprehensive growth and yield model for the mixed hardwood forests of the southern Appalachian region. In this study, sensitivity analyses were performed on the FVS-Sn …
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The competitive dynamics of two Protea shrubs growing in a mixed fynbos stand
… were used for measuring competition in a mixed stand of P. lepidocarpodendron and P. corona/a growing on the Cape Peninsula. These were the plot-based averaging method, which considers stand density, and the nearest neighbour approach, which considers competitive impacts as a function of the …
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Modeling General Response to Silvicultural Treatments in Loblolly Pine Stands
… to silvicultural treatments for loblolly pine stands were developed using data from various silvicultural experiments across Southern United States. Growth models for treated stands were developed by multiplying base-line growth models with modifier response functions/multipliers accounting for …
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Turning up the heat: fire ecology and climate adaptive silviculture in longleaf pine forests
… and control of prescribed fires. Understanding how fire may differ in drier climates and a better foundation for understanding spatial variability of fire will be key to managing with prescribed fire in future climates. To address these challenges, managers are considering …
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Long-Term Effects of Thinning and Prescribed Fire on Tree Growth and Bark Beetle Demography in a Jeffrey Pine Stand
… their effects on long-term individual tree and stand level growth responses as well as bark beetle demography in pure, uneven-aged Jeffrey pine (Pinus jeffreyi Grev. & Balf.) accompanied by isolated California white fir (Abies concolor var. lowiana [Gord.] Lemm.). Based on both dimension and …
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