Global ETD Search
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 359 for “"Plantations."”.
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Modeling Mortality of Loblolly Pine Plantations
… models were developed for loblolly pine plantations throughout its geographic range in the United States. The model for predicting stand mortality were developed using stand characteristics and biophysical variables. The models were constructed using two modeling approaches. In the first …
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Planter's Paradise: Nature, Culture, and Hawaiʻi’s Sugarcane Plantations
Over the course of the nineteenth century, the Hawaiian sugar industry rose from economic insignificance to become one of the world’s most efficient and productive sugarcane plantation systems. "Planter's Paradise" traces the transnational environmental history of cane planting in Hawaiʻi, from …
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Modeling growth dynamics of juvenile loblolly pine plantations
… growth dynamics of juvenile loblolly pine plantations can help to address important management decisions that have to be made in young stands. The present study addressed diameter and height prediction as well as crown development analysis as functions of independent variables such as site …
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Characterizing spatiotemporal variation in LAI of Virginia Pine Plantations
Loblolly pine is an important managed tree species within the southeastern United States, and better understanding spatial patterns in its productivity has potential to contribute to both modeling and management of the species. Using recently-created pine management maps specific to Virginia and …
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Economic guidelines for establishing loblolly pine plantations in Virginia
Economic guidelines for regenerating loblolly pine were developed for Virginia forest landowners. The general procedure used was the structured personal interview. The basic economic guidelines are expected regeneration costs calculated using the actual total regeneration cost and an associated …
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The dynamics of litterfall in eucalypt woodland surrounding pine plantations
… hemisphere, where over 4 million hectares of plantations have been established. In fact, radiata pine is now the most commonly cultivated conifer in the world. A growing body of evidence from studies in the southern hemisphere has shown that pines are spreading invasively beyond the confines …
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Economics of Managing Loblolly Pine Plantations for Increased Wildlife Biodiversity
… managing loblolly pine (<em>Pinus taeda</em>) plantations in East Texas for strictly timber production or a combination of timber production and wildlife biodiversity. Management regimes evaluated had varying planting densities, thinning frequency and intensities, prescribed burn intervals, and …
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Ecological Enhancement of Timber Growth: Applying Compost to Loblolly Pine Plantations
This study explored the application of compost onto a small loblolly pine tree forest in northeast Texas. Its purpose was to determine if the application of various amounts of compost would provide for accelerated rates of growth for the trees. Soil parameters were also monitored. A total of 270 …
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Entomopathogenic nematode interactions with white grubs from forest and sugarcane plantations
… white grubs collected from wattle and sugarcane plantations in the Mpumalanga and KwaZulu-Natal provinces of South Africa. Using bioassays, EPN pathogenicity towards white grubs as well as the white grub resistance mechanisms to EPN infection were evaluated using eleven locally isolated EPNs. The …
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GIS-based approach to participatory land suitability analysis for tree plantations
Tree plantations that use significant amounts of the government’s financial and human resources have been established in Indonesia. Unfortunately, the result has not been satisfactory. One of the primary reasons for this is that the government acted unilaterally in determining the locations and …
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Dominance/Suppression Competitive Relationships in Loblolly Pine (Pinus taeda L.) Plantations
… studies with loblolly pine (Pinus taeda L.) plantations were used to examine inequality (Gini coefficient) trends in diameter and the relationship between diameter relative growth rate (r) and initial size. Analysis with two spacing studies shows inequality increases with increasing density. …
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Empirical diameter distributions and predicted yields of thinned loblolly pine plantations
… growth and yield model for thinned loblolly pine plantations was developed based on data from 128 0.2-acre permanent plots in the Virginia Piedmont and Coastal Plain. The segmented cdf which characterized the diameter distribution of a stand was searched for such that the resulting total basal …
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Survival equations for loblolly pine trees in cutover, site- prepared plantations
The probability of mortality for an individual tree with certain characteristics growing under certain conditions was modeled. A particular algorithm SCREEN was used to fmd the best set of predictors variables. This algorithm was specially created to be used when the dependent variable can take …
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Compatible whole-stand and diameter distribution models for loblolly pine plantations
… the diameter distribution of unthinned plantations of loblolly pine from whole stand predictions of stand attributes. The beta probability density function (pdf) and the Weibull pdf were used as models for the diameter distribution function for estimating a stand attribute (such as …
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Simulation of Early Stand Development in Intensively Managed Loblolly Pine Plantations
A system of equations was developed and incorporated into the PTAEDA2 loblolly pine stand simulator to provide growth projections from time of planting. Annual height growth is predicted using a two-parameter Weibull function, where distribution parameters are estimated from equations that utilize …
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Carbon sequestration in short-rotation forestry plantations and in Belgian forest ecosystems
In deze studie werd nagegaan in hoeverre plantages met een korte omloopstijd en Belgische bossen kunnen bijdragen tot het bereiken van de broeikasgasemissiereductiedoelstelling die de Belgische overheid aangegaan is onder het Kyoto Protocol.
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Growth Models and Mortality Functions for Unthinned and Thinned Loblolly Pine Plantations
… for use with loblolly pine (Pinus taeda) plantations established on cut-over, site prepared lands. Data from a long-term thinning study served as a basis for attempting to improve the predictive output of PTAEDA2. Assessment of differences in model parameter estimates between three levels …
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A comparison of yield estimation techniques for old-field loblolly pine plantations
… management of loblolly pine (Pinus taeda) plantations requires accurate estimation of stand yield at rotation. Methods of estimating yield from stand variables, existing number of trees per acre, height of the dominant and co-dominant stand, and stand age, are presented. These methods …
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