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 242 for “"loblolly pine"”.
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Mycotrophy in loblolly pine
… the survival of seedlings. The survival of pine seedlings was tested in non-sterile and gnotobiotic systems when <i>Pisolithus tinctorius</i> and <i>Rhizoctonia solani</i> were added alone and in combination. When <i>P. tinctorius</i> alone was added to growth substrate of the pines, the …
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Zinc Uptake in Loblolly Pine Seedlings
… the root, terminal growth, stem, and needles of loblolly pine (Pinus taeda L.) were measured in 72 seedlings grown in washed sand, fertilized with Zn(N03)2. Zinc treatment periods were early spring, late spring, and summer. Zinc uptake was the greatest in early spring. Zinc nitrate fertilizer and …
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Modeling Mortality of Loblolly Pine Plantations
… mortality 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. …
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Loblolly Pine Genetics Structure Its Mycorrhizal Community
… interactions belowground with EM fungi, loblolly pine populations are subject to aboveground antagonistic interactions in the form of insect pests and fungal pathogens. Through both laboratory and field experiments, the work presented here explores the degree to which mycorrhizal traits …
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Modeling growth dynamics of juvenile loblolly pine plantations
Modeling 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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Modeling Loblolly Pine Dominant Height Using Airborne LiDAR
<p>The dominant height of 73 georeferenced field sample plots were modeled from various canopy height metrics derived by means of a small-footprint laser scanning technology, known as light detection and ranging (or just LiDAR), over young and mature forest stands using regression analysis. LiDAR …
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Modeling canopy structure effects on loblolly pine growth
… structure and their influence on growth of loblolly pine (Pinus taeda L.) plantations. Foliage distribution, crown hydraulic architecture, and the effect of chronological changes in canopy structure on stand development were explored as possible components of a future process-based model …
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Factors affecting loblolly pine growth following site preparation
… required silvicultural practice for establishing loblolly pine plantations in the Piedmont physiographic region of the southeastern U.S.; however, relatively little is known about its effect on soil and site factors that influence growth and yield. In this study, the effect of seven different site …
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Optimizing loblolly pine management with stochastic dynamic programming
… optimal site preparation intensity of un thinned loblolly pine plantations under the assumption of lisk aversion. It concentrates exclusively on financial motives and does not take non-market values and portfolio considerations into account. The results should be interpreted with these limitations …
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Modeling Green Weight of Loblolly Pine (Pinus taeda L.)
… green weight per unit volume relationships for loblolly pine trees have not been studied extensively and models for predicting weights across broad geographic areas are not readily available. In this regard three basic interrelated issues were addressed in this study: 1) an examination of weight …
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An integrated system of stand models for loblolly pine
… 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 a …
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Stress detection in loblolly pine using relative apparent temperatures
The hypothesis that stressed loblolly pine (Pinus taeda L.) could be distinguished from non-stressed loblolly pine by increased foliage temperatures was tested. The foliage temperatures of seedlings and trees were measured with an AGA Thermovision 680 system, imported by the AGA Corporation, …
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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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Estimation and Determination of Carrying Capacity in Loblolly Pine
… and determining the carrying capacity in loblolly pine. Maximum stand basal area (BA) that can be sustained over a long period of time can be regarded as a measure of carrying capacity. To quantify and project stand BA carrying capacity, one approach is to use the estimate from a fitted …
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Economics of Managing Loblolly Pine Plantations for Increased Wildlife Biodiversity
… costs incurred and revenues gained from 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 …
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Loblolly pine site index curves constructed from age-height data
… for natural stands and plantation stands of loblolly pine in the Southeast were constructed from temporary age height data by an anamorphic technique and two polymorphic techniques. These different systems of site index curves were evaluated using sectioned tree data. Evaluation results …
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Modeling General Response to Silvicultural Treatments in Loblolly Pine Stands
… general response 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 …
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Loblolly pine response to drainage and fertilization of hydric soils
Loblolly pine (<i>Pinus taeda</i>) productivity on wet flats of the lower coastal plain of Virginia is largely affected by the presence of high water tables and infertile soil. Site preparation by bedding and ditching can alleviate high water tables and increase aerated soil rooting volume, …
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Root growth potential and weed control effects on the first year growth of pitch x loblolly pine (Pinus ridiga x P. taeda L.) and loblolly pine
… herbaceous weed control (Oust-Garlon) on three pine seedlots: pitch x loblolly pine hybrid (pxL-F2), Virginia Department of Forestry loblolly pine (VDF-Iob), and westvaco loblolly pine (WCO-Iob). Lateral roots had the greatest response to the Oust treatment compared to all other seedling parts. …
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Volume and taper equations for loblolly pine trees using dimensional analysis
… general volume equation was developed. Data from loblolly pine trees grown in natural stands in the Coastal Plain of North Carolina and the Coastal Plain and Piedmont areas of Virginia were used to estimate the parameters for these volume equations. A dimensionally compatible volume equation is …
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