Diameter Growth, Survival, and Volume Estimates for Missouri Trees

1982 ◽  
Author(s):  
Stephen R. Shifley ◽  
W. Brad Smith
Keyword(s):  
Diameter Growth ◽  
Volume Estimates

PETROLOGIC CORRELATIONS TO EXPAND VOLUME ESTIMATES OF THE MIOCENE COUGAR POINT TUFF, YELLOWSTONE HOT SPOT TRACK

2019 ◽  
Author(s):  
Gabriel M. Carbone ◽  
◽  
Christian M. Schrader ◽  
Scott Boroughs ◽  
John A. Wolff
Keyword(s):  
Hot Spot ◽  
Volume Estimates

Crop Tree Release of a Scarlet-Black Oak Stand

1988 ◽  
Vol 5 (2) ◽  
pp. 96-99 ◽  
Author(s):  
Robert J. Mitchell ◽  
John P. Dwyer ◽  
Ralph A. Musbach ◽  
Harold E. Garrett ◽  
Gene S. Cox ◽  
...  
Keyword(s):  
Stand Age ◽  
Diameter Growth ◽  
Precommercial Thinning ◽  
Tree Thinning ◽  
Black Oak

Abstract In 1953 and 1954 a series of crop tree thinning and pruning studies were initiated in 30- to 35-year-old stands composed predominantly of scarlet oak and black oak. Growth of the crop trees was monitored until the average stand age was 61. Removal of all trees whose crowns were within 8 ft of the 50 crop trees resulted in significantly increased diameter growth and cubic volume of wood produced. The moderate and heavy 50-crop-tree thinning treatments produced the highest net cubic volume per acre. Crop tree thinning also tended to reduce mortality during the study period. Yield increases due to thinning in this study were comparable to those previously determined to economically justify a precommercial thinning of the scarlet and black oak type in Missouri. North. J. Appl. For. 5:96-99, June 1988.

scholarly journals Precommercial Thinning Increases Spruce Yields in Boreal Mixedwoods in Alberta, Canada

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 412
Author(s):  
Ivan Bjelanovic ◽  
Phil Comeau ◽  
Sharon Meredith ◽  
Brian Roth
Keyword(s):  
Growth Models ◽  
Growth And Yield ◽  
Diameter Growth ◽  
Growth Responses ◽  
Projection System ◽  
Precommercial Thinning ◽  
Thinning Intensity ◽  
Boreal Mixedwoods ◽  
Using Data ◽  
Mixedwood Stands

A few studies in young mixedwood stands demonstrate that precommercial thinning of aspen at early ages can improve the growth of spruce and increase stand resilience to drought. However, information on tree and stand responses to thinning in older mixedwood stands is lacking. To address this need, a study was initiated in 2008 in Alberta, Canada in 14 boreal mixedwood stands (seven each at ages 17 and 22). This study investigated growth responses following thinning of aspen to five densities (0, 1000, 2500, 5000 stems ha−1 and unthinned (control)). Measurements were collected in the year of establishment, and three and eight years later. Mortality of aspen in the unthinned plots was greater than in the thinned plots which were not significantly different amongst each other. Eight years following treatment, aspen diameter was positively influenced by thinning, while there was no effect on aspen height. The density of aspen had no significant effect on the survival of planted spruce. Spruce height and diameter growth increased with both aspen thinning intensity and time since treatment. Differentiation among treatments in spruce diameter growth was evident three years from treatment, while differentiation in height was not significant until eight years following treatment. Yield projections using two growth models (Mixedwood Growth Model (MGM) and Growth and Yield Projection System (GYPSY)) were initialized using data from the year eight re-measurements. Results indicate that heavy precommercial aspen thinning (to ~1000 aspen crop trees ha−1) can result in an increase in conifer merchantable volume without reducing aspen volume at the time of harvest. However, light to moderate thinning (to ~2500 aspen stems ha−1 or higher), is unlikely to result in gains in either deciduous or conifer merchantable harvest volume over those of unthinned stands.

scholarly journals How to Evaluate Downed Fine Woody Debris Including Logging Residues?

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 881
Author(s):  
Nathalie Korboulewsky ◽  
Isabelle Bilger ◽  
Abdelwahab Bessaad
Keyword(s):  
Wood Density ◽  
Stock Assessment ◽  
Woody Debris ◽  
Diameter Class ◽  
Density Measurements ◽  
Fine Woody Debris ◽  
Forest Inventories ◽  
Test Zone ◽  
Fixed Area ◽  
Volume Estimates

Volume or biomass estimates of downed woody debris are crucial for numerous applications such as forest carbon stock assessment, biodiversity assessments, and more recently for environmental evaluations of biofuel harvesting practices. Both fixed-area sampling (FAS) and line-intersect sampling (LIS) are used in forest inventories and ecological studies because they are unbiased and accurate methods. Nevertheless, most studies and inventories take into account only coarse woody debris (CWD, >10 cm in diameter), although fine woody debris (FWD) can account for a large part of the total downed biomass. We compared the LIS and FAS methods for FWD volume or biomass estimates and evaluated the influence of diameter and wood density measurements, plot number and size. We used a Test Zone (a defined surface area where a complete inventory was carried out, in addition to FAS and LIS), a Pilot Stand (a forest stand where both LIS and FAS methods were applied) and results from 10 field inventories in deciduous temperate forest stands with various conditions and amounts of FWD. Both methods, FAS and LIS, provided accurate (in trueness and precision) volume estimates, but LIS proved to be the more efficient. Diameter measurement was the main source of error: using the mean diameter, even by diameter class, led to an error for volume estimates of around 35%. On the contrary, wood density measurements can be simplified without much influence on the accuracy of biomass estimates (use of mean density by diameter class). We show that the length and number of transects greatly influences the estimates, and that it is better to apply more, shorter transects than fewer, longer ones. Finally, we determined the optimal methodology and propose a simplification of some measurements to obtain the best time-precision trade-off for FWD inventories at the stand level.

Real-time precision measuring device of tree diameter growth

2016 ◽  
Author(s):  
Mingming Guo ◽  
Aijun Chen ◽  
Dongsheng Li ◽  
Nan Liu ◽  
Jingyuan Yao
Keyword(s):  
Real Time ◽  
Diameter Growth ◽  
Measuring Device ◽  
Tree Diameter ◽  
Precision Measuring

Deriving Tree Diameter Growth and Probability of Survival Equations from Successive Diameter Distributions

2008 ◽  
Vol 54 (1) ◽  
pp. 31-35
Author(s):  
Thomas G. Matney ◽  
Emily B. Schultz
Keyword(s):  
General Procedure ◽  
Growth And Yield ◽  
Diameter Distribution ◽  
Diameter Growth ◽  
Individual Tree ◽  
Statistical Probability ◽  
Growth And Survival ◽  
Tree Diameter ◽  
Growth And Yield Models ◽  
Diameter Distributions

Abstract Many growth and yield models have used statistical probability distributions to estimate the diameter distribution of a stand at any age. Equations for approximating individual tree diameter growth and survival probabilities from dbh can be derived from these models. A general procedure for determining the functions is discussed and illustrated using a loblolly pine spacing study. The results from the spacing study show that it is possible to define tree diameter growth and survival probability functions from diameter distributions with an accuracy sufficient to obtain a link between the individual tree and diameter growth and yield models.

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