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Showing 1 to 13 of 13 for “"Quadratic Mean Diameter"”.
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A CENTURY OF CHANGE IN FOREST STRUCTURE AND FIRE REGIME CONDITION CLASS IN A WESTERN MONTANA PONDEROSA PINE DOUGLAS-FIR FOREST
… 2007, including tree data to the nearest 1 inch diameter class to produce a modern day version of the original 1902 notes. A point-to-tree sampling system was then applied to both the 1902 and 2007 bearing tree data to determine tree density (trees/acre) and basal area stocking by species and …
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A CENTURY OF CHANGE IN FOREST STRUCTURE AND FIRE REGIME CONDITION CLASS IN A WESTERN MONTANA PONDEROSA PINE DOUGLAS-FIR FOREST
… 2007, including tree data to the nearest 1 inch diameter class to produce a modern day version of the original 1902 notes. A point-to-tree sampling system was then applied to both the 1902 and 2007 bearing tree data to determine tree density (trees/acre) and basal area stocking by species and …
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Chinese Tallow Long-Term Impact on Stand Dynamics in a Bottomland Hardwood Forest Following Vegetation Management
… = 0.883, basal area <em>p</em> = 0.843, quadratic mean diameter <em>p</em> = 0.851, relative density <em>p</em> = 0.901). Diversity and evenness differed in all sapling plots from 2022 data to 2012-2013 data (diversity 2022-2012 <em>p</em> = p = p = 0.797, basal area<em> p</em> = 0.335, …
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Stand Strucuture of Planted Stands in Storm-Water Retention Basins
… (trees per hectare, basal area per hectare, quadratic mean diameter, relative density, average tree height, and percent canopy coverage) as they relate to leaf area index (LAI) and stand age. Simple linear regressions were used to determine relationships for: structure variables with LAI, …
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Effects of Wildfire Intensity on Invasives, Stand Structure and Fuel Loading in Shenandoah National Park
… were used to determine specific gravity and quadratic mean diameter for each size class of fuel and to determine the bulk density of the duff and litter layers. High intensity wildfires initially reduced species diversity and evenness in the tree and herbaceous strata, but after 14 years tree …
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Assessing the effects of field plot size and stand structure on forest inventory estimates derived from laser altimetry data
… techniques. Models were fitted for maximum and mean heights, stand basal area, stem density, and quadratic mean diameter. A validation routine was performed using an independent dataset and models derived from different plot sizes were assessed using goodness of fit, validation root mean squared …
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Assessing the effects of field plot size and stand structure on forest inventory estimates derived from laser altimetry data
… techniques. Models were fitted for maximum and mean heights, stand basal area, stem density, and quadratic mean diameter. A validation routine was performed using an independent dataset and models derived from different plot sizes were assessed using goodness of fit, validation root mean squared …
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Predicting height to live crown increment for thinned and unthinned loblolly pine plantations
… the distance-dependent model and the ratio of quadratic mean diameter to tree dbh (DR) for the distance-independent model. The distance-dependent and the distance-independent models were the same form, except for the expression for competition. Hypothesis tests revealed that thinning, both its …
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Survival equations for loblolly pine trees in cutover, site- prepared plantations
… PTAEDA. The logistic model with CR, HH and DD (quadratic mean diameter/dbh) was compared with the survival model already used in a distance-independent model TRULOB. In both cases the behavior of the logistic model was quite similar to the published models. For the thinned plots the predictor …
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Modeling maximum size-density relationships of loblolly pine (Pinus taeda L.) plantations
… obtainable for a given average tree size, often quadratic mean diameter (D). An MSDR species boundary line has been defined as a static upper limit of maximum tree density -- D relationships that applies to all stands of a certain species within a particular geographical area. MSDR dynamic …
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Effects of Silvicultural Management on Coast Redwood Forest Composition, Density and Structure in Santa Cruz and San Mateo Counties
… per acre (TPA), basal area per acre (BA), and quadratic mean diameter (QMD) were calculated from the "snapshot" data and stratified by species groups and diameter ranges/canopy layers.</p> <p>Forest components were derived from the dataset by selecting specific groups within the forest as …
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Dimensionally Compatible System of Equations for Tree and Stand Volume, Basal Area, and Growth
A dimensionally compatible system of equations for stand basal area, volume, and basal area and volume growth was derived using dimensional analysis. These equations are analytically and numerically consistent with dimensionally compatible individual tree volume and taper equations and share …
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Aprovechamiento sostenible de las acebedas del Sistema Ibérico Norte: caracterización, crecimiento, propagación, conservación, tratamientos selvícolas y producción de ramilla con fines ornamentales
… 25.000 stems/ha) and low valúes of height and quadratic mean diameter. We also made a model for the biomass and the growth (both in height and diameter) for individuáis in the open stands and for sprouts in the whole holly forest. Both diametral and height growth evolution were studied in every …