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Showing 1 to 20 of 36 for “"diameter growth"”.
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Methods for modeling whole stem diameter growth and taper
… and taper to be the rate of narrowing in diameter given a tree form. Ormerod's stem profile model was selected as the basic model since its parameters were readily interpretable in terms of Gray's taper and form definitions. Two stage modeling procedures were used to relate individual tree …
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Testing methods for calibrating Forest Vegetation Simulator (FVS) diameter growth predictions
The Forest Vegetation Simulator (FVS) is a growth and yield modeling system widely-used for predicting stand and tree-level attributes for management and planning applications in North American forests. The accuracy of FVS predictions for a range of tree and stand level attributes depends a great …
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Diameter/basal area increment equations for loblolly pine trees in cutover, site-prepared plantations
The objective of this study was to develop diameter/basal area increment equations for loblolly pine trees in thinned and unthinned plantations on cutover, site-prepared areas. Results indicated that one set of coefficients was sufficient to estimate individual tree growth (for the three year …
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Climate control on plant performance across an Andean altitudinal gradient
… appear more important in determining tree growth. Insolation, which is controlled largely by cloudiness in these tropical latitudes, peaked from September to December, and was associated with a seasonal peak in tree diameter growth rate, suggesting that forests on the eastern slope of the …
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Zinc Uptake in Loblolly Pine Seedlings
<p>Zinc concentrations in 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. …
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Two Year Survival and Growth of Loblolly Pine Seedlings from Two Texas Seed Sources on Lignite Minesoils
… in Panola County, Texas. Heights, root-collar diameters, and survival were monitored for two years. Treatments included application of Pisolithus tinctorius basidiospores immediately after planting and use of acephate for tip moth control during the second growing season. Standard foliar …
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The Effects of Nitrogen and Phosphorus Fertilizer on a Young Loblolly Pine Plantation on Lignite Mine Spoil in East Texas
… on a lignite mine spoil in East Texas. Growth parameters, foliar and spoil nitrogen and phosphorus concentrations were measured after two growing seasons. Nitrogen increased diameter growth during the first year, and foliar nitrogen increased with increasing fertilizer rates for both …
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Dynamic modeling of branches and knot formation in loblolly pine (Pinus taeda L.) trees
… framework to simulate the process of initiation, diameter growth, death and self-pruning of branches in loblolly pine (Pinus taeda L.) trees was developed. A data set was obtained from a destructive sampling of whorl sections from 34 trees growing under different initial spacing. Data from …
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The Regeneration Niche in Bottomland Hardwood Forests: Tree and Herbaceous Communities Along Interacting Gradients of Flood and Light in East Texas Floodplains
… rate, light compensation point, and height growth rate. Both species responded to flooding by increasing diameter growth rate, but only when not subject to shade. Together, these findings contribute to a broader understanding of the ecological factors that shape species’ distributions within …
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MODELLING THE GROWTH OF THE LOGGED OVER INLAND PRODUCTION FORESTS OF PENINSULAR MALAYSIA WITH FOREST MANAGEMENT CONSIDERATION
The study objectives are (1) to develop growth models for inland tropical rain forests and (2) to propose changes to the current management systems and cutting regime options. In the Malaysia context inland forests encompass lowland, coastal hill, hill and upper hill forests, 'flic current …
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IMPROVING CANNABIS SATIVA'S PHYTOREMEDIATION CAPABILITIES OF FOREVER CHEMICALS THROUGH MICROBIAL INOCULATIONS
… hemp (Cannabis sativa L.). Plant height and stem diameter growth rates and biomass accumulation were compared across treatments with and without PFOS exposure and microbial inoculation. PFOS exposure and microbial inoculation did not significantly affect plant growth or biomass accumulation. …
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Growth and demography of Quercus coccinea and Q. prinus ramets and genets after clearfelling
Growth and mortality of ramets (stump sprouts) and genets (sprout clumps) of scarlet and chestnut oak were examined on three sites at ages 1-2 (YRI-2), 4-5 (YR4-5) and 7-8 (YR 7-8). Based on a test of the older site with the younger using 2-year-old data, it was concluded that the two populations …
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Sensitivity Analysis of the Forest Vegetation Simulator Southern Variant (FVS-Sn)for Southern Appalachian Hardwoods
… USDA Forest Service to project and report forest growth and yield predictions for the Southern United States. It is able to project forest growth and yield for different forest types and management prescriptions, but it is a relatively new, complex, and untested model. These limitations …
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Biofertilizante bovino via água de irrigação: ação no crescimento, produção e qualidade dos frutos de maracujazeiro amarelo .
… bovine, applied to soil in liquid form on growth vegetative of the olants, yield and fruit quality of yellow passion fruit harvested at beginning and final of harvest. Treatments were arranged in a randomized block design in a factorial 2 x 5 x 2 referring to biofertilizers (common and …
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Quantitative Electron Microscopy Studies of Silicon Germanium/silicon(001)
… transition. We show how the thermodynamic island diameter is ∝1/32r , where 3r is the strain reduction in an island. We also use these methods to understand the kinetic properties of the island formation and growth. We show that Ge does segregate out of Si1-xGe x alloy films to create islands …
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Growth loss of loblolly pine (Pinus taeda L.), white pine (P. strobus L.) and sycamore (Platanus occidentalis L.) proximal to a periodic source of air pollution
… a NO<sub>x</sub>-SO₂ air pollution regime on the growth of forest trees was investigated. Radial increment growth studies were conducted to determine if correlations existed between emission levels of a source (predicted by production levels) and radial increment growth of forest trees. Three …
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Physiological and growth responses to thinning in eight-year-old loblolly pine (Pinus taeda L.) stands
… xylem water potential, water use efficiency and growth of loblolly pine trees was studied during their ninth and tenth growing seasons. Litterfall dynamics were monitored throughout the study period as well. At the end of the second post-thinning growing season, trees in thinned plots had greater …
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Growth Models and Mortality Functions for Unthinned and Thinned Loblolly Pine Plantations
Effects of thinning, such as increased diameter growth and decreased mortality in the residual stand, have been recognized by foresters for many years. These effects are largely the result of increased tree vigor which is induced by a decreased level of competition. These relationships are …
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Stem and Branch Diameter Response in Pruned Douglas-fir Plantations (Pseudotsuga menziesii var. menziesii): Implications for Volume and Clear Wood Production in the U.S. Pacific Northwest
… that pruning may increase overall height and diameter growth rates, reduce log taper and produce more valuable clear wood. This study measured 426 trees located in Stand Management Cooperative installations throughout Western Washington and Oregon to determine stem and branch diameter response …
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Soil Amelioration and Plant Establishment on Sodium Affected Soils on Galveston Island, Texas
… was replicated six times. Plant survival and growth was monitored over two years. Only exchangeable soil Na+ and soluble Ca2+ concentrations showed statistically significant differences among treatments. Na+ translocated into the constructed raised beds during the study. Na+ input from sea …
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