Responses of Red Alder to Thinning

1995 ◽  
Vol 10 (1) ◽  
pp. 17-23 ◽  
Author(s):  
David E. Hibbs ◽  
William H. Emmingham ◽  
Michael C. Bondi
Keyword(s):  
Basal Area ◽  
Height Growth ◽  
Diameter Growth ◽  
Alnus Rubra ◽  
Coast Range ◽  
Red Alder ◽  
Oregon Coast Range ◽  
Oregon Coast ◽  
Basal Area Growth ◽  
Area Growth

Abstract Responses of red alder (Alnus rubra Bong.) to thinning were observed at two sites in the Oregon Coast Range. Five years after thinning in the 20-yr-old stand, mortality was observed only in control plots. Diameter growth of crop trees increased up to 54% with thinning. Trends toward less height growth at wider spacings and increased growth in basal area compared to controls appeared to be developing in thinned plots. Ten years after thinning in the 14-yr-old stand, the problems of flashback seen at year 5 in the chemically thinned plots had largely been overcome. Reduction in height growth in all thinned plots had been overcome. Net basal area growth was up to 60% greater in thinned treatments. Thinning appears effective for 10 to 15 yr in the narrow spacings and 15 to 20 yr in the wide spacings. West. J. Appl. For. 10(1): 17-23.

scholarly journals Basal area growth, carbon isotope discrimination, and intrinsic water use efficiency after fertilization of Douglas-fir in the Oregon Coast Range

2017 ◽  
Vol 389 ◽  
pp. 285-295 ◽  
Author(s):  
Eladio H. Cornejo-Oviedo ◽  
Steven L. Voelker ◽  
Douglas B. Mainwaring ◽  
Douglas A. Maguire ◽  
Frederick C. Meinzer ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Carbon Isotope Discrimination ◽  
Basal Area ◽  
Coast Range ◽  
Oregon Coast Range ◽  
Oregon Coast ◽  
Intrinsic Water Use Efficiency ◽  
Area Growth ◽  
Use Efficiency

Correlations Between Overtopping Vegetation and Development of Douglas-Fir Saplings in the Oregon Coast Range

1987 ◽  
Vol 2 (4) ◽  
pp. 117-119 ◽  
Author(s):  
Samuel S. Chan ◽  
John D. Walstad
Keyword(s):  
Pseudotsuga Menziesii ◽  
Tree Height ◽  
Douglas Fir ◽  
Morphological Features ◽  
Diameter Growth ◽  
Coast Range ◽  
Oregon Coast Range ◽  
Oregon Coast ◽  
Sapling Growth ◽  
Stem Diameter Growth

Abstract The response of Douglas-fir (Pseudotsuga menziesii) saplings to overtopping vegetation on three northeast-facing sites in the Oregon Coast Range was studied for two years. As amount of overtopping brush increased, sapling growth (as indicated by size) generally decreased. Basal stem diameter growth was most reduced, but similar reductions in growth occurred for tree height and other morphological features. West. J. Appl. For. 2(4):117-119, October 1987.

Growth following single-tree selection cutting in Québec northern hardwoods

2003 ◽  
Vol 79 (5) ◽  
pp. 898-905 ◽  
Author(s):  
Steve Bédard ◽  
Zoran Majcen
Keyword(s):  
Acer Saccharum ◽  
Sugar Maple ◽  
Basal Area ◽  
Northern Hardwoods ◽  
Diameter Growth ◽  
Selection Cutting ◽  
Single Tree ◽  
Basal Area Growth ◽  
Area Growth ◽  
Single Tree Selection

Eight experimental blocks were established in the southern part of Québec to determine the growth response of sugar maple (Acer saccharum) dominated stands after single tree selection cutting. Each block contained eight control plots (no cut) and eight cut plots. The intensity of removal varied between 21% and 32% and residual basal area was between 18.2 and 21 m2/ha. Ten year net annual basal area growth rates in cut plots (0.35 ± 0.04 m2/ha) were significantly higher (p = 0.0022) than in control plots (0.14 ± 0.06 m2/ha). The treatment particularly favoured diameter growth of stems between 10 and 30 cm in dbh, whose crowns were released by removing neighbouring trees. These results show that if the same net growth rate is maintained in the next decade most of the cut plots will reach their pre-cut basal area in about 20 years after cutting. Key words: northern hardwoods, selection cutting, uneven aged silviculture, basal area growth, diameter growth

Relationships between tree crown, stem, and stand characteristics in unthinned loblolly pine plantations

1987 ◽  
Vol 17 (6) ◽  
pp. 534-538 ◽  
Author(s):  
Peter T. Sprinz ◽  
Harold E. Burkhart
Keyword(s):  
Loblolly Pine ◽  
Basal Area ◽  
Projection Area ◽  
Diameter Growth ◽  
Tree Crown ◽  
Basal Area Growth ◽  
Area Growth ◽  
Mean Diameter ◽  
Stand Attributes ◽  
Stand Characteristics

Empirical and theoretical relationships between tree crown, stem, and stand characteristics for unthinned stands of planted loblolly pine (Pinustaeda L.) were investigated. Readily measured crown variables representing the amount of photosynthetic area or distance of the translocation process were identified. Various functions of these variables were defined and evaluated with regard to efficacy in predicting stem and stand attributes. Linear models were used to evaluate the contribution of the crown variables in predicting stem and stand characteristics. The stem attributes modeled included basal area, basal area growth, diameter at breast height, and diameter growth, while the stand attributes modeled were basal area, basal area growth, arithmetic mean diameter, and mean diameter growth. Crown diameter and crown projection area were particularly important in contributing to model fit and prediction of individual stem characteristics, while sum of crown projection areas was found especially important in stand level equations. As these crown measures developed over time so did corresponding stem and stand attributes.

Construction and Installation of Homemade Dendrometer Bands

1986 ◽  
Vol 3 (2) ◽  
pp. 73-75 ◽  
Author(s):  
Peter J. Cattelino ◽  
Charles A. Becker ◽  
Leslie G. Fuller
Keyword(s):  
Basal Area ◽  
Common Type ◽  
Diameter Growth ◽  
Tree Diameter ◽  
Basal Area Growth ◽  
Area Growth ◽  
Dendrometer Bands ◽  
Field Setting

Abstract Dendrometer bands are common tools used when accurate measurement of tree-diameter growth or basal-area growth is desired. This common type of dendrometer consists of a metal band placed around the stem of the tree with reading scales scribed on the overlapping portions of the band. Homemade dendrometer bands can be made and installed efficiently and economically. Complete instructions together with a description of materials necessary for the construction and placement of dendrometer bands are presented. Evaluation of dendrometer bands in a field setting is also discussed. North. J. Appl. For. 3:73-75, June 1986.

scholarly journals EVALUATING THE COMPETITIVE ENVIRONMENT FOR WILD PISTACHIO (Pistacia atlantica Desf.) SEEDLINGS IN THE CENTRAL FORESTS OF IRAN

2018 ◽  
Vol 42 (6) ◽  
Author(s):  
Bahman Kiani ◽  
Asma Amiri
Keyword(s):  
Basal Area ◽  
Height Growth ◽  
Good Precision ◽  
Pistacia Atlantica ◽  
Basal Area Growth ◽  
Area Growth ◽  
Amygdalus Scoparia ◽  
The Relationship ◽  
Area Development ◽  
Competition Indices

ABSTRACT Wild pistachio (Pistacia atlantica Desf.) is an important tree species from dry forests of Eurasia. Seedlings must usually compete with other tree and shrub species in the dry harsh environment of mountain forests. In this study, we identified the main competitor species and evaluated some widely used competition indices, including distance-dependent and distance-independent ones, to quantify the relationship between the reference seedlings and their neighbors. The results indicated that the main competitors are mountain almond (Amygdalus scoparia Spach.), thorny almond (Amygdalus lycioides Spach.), montpellier maple (Acer monspessulanum subsp. cinerascens Boiss.) and other wild pistachio seedlings. We found that competition increases the height growth but reduces the diameter, basal area growth and crown development of wild pistachio seedlings. Some competition indices had a noticeable correlation with seedling growth, indicating that competition does exist. A combination of log-transformed indices could explain 85% of the diameter growth variations, 46% of height growth, 76% of basal area growth and 72% of crown area development with a good precision.

Relationship Between Occurrence of Laminated Root Rot and Site Characteristics in Douglas-Fir Forests of the Northern Oregon Coast Range

1994 ◽  
Vol 9 (1) ◽  
pp. 14-17 ◽  
Author(s):  
Walter W. Kastner ◽  
Donald J. Goheen ◽  
Robert L. Edmonds
Keyword(s):  
Root Rot ◽  
Basal Area ◽  
Douglas Fir ◽  
Slope Position ◽  
Coast Range ◽  
Plant Association ◽  
Oregon Coast Range ◽  
Oregon Coast ◽  
Disease Occurrence ◽  
Site Characteristics

Abstract In the northern Oregon Coast Range 70- to 100-yr old Douglas-fir (Pseudotsuga menziesii) stands were evaluated to determine rate of infection by laminated root rot, caused by (Phellinus weirii), whether local disease occurrence was associated with site characteristics, and impacts of P. weirii on the number of trees and basal area. Overall infection rate was 5.6%, but varied from 0.0 to 14.7% among stands. There was a significant association between occurrence of P. weirii and slope position. The rate of infection on ridges, upper slopes, middle slopes, and lower slopes was 13.0, 7.3, 4.1, and 0.0%, respectively. Occurrence of P. weirii was independent of plant association and aspect. Infected plots contained 25% less live Douglas-fir basal area and 35% fewer live Douglas-fir trees per ac than uninfected plots. West. J. Appl. For. 9(1):14-17.

Fertilization of a pole-sized maple stand: 10-year results

1980 ◽  
Vol 10 (2) ◽  
pp. 158-163 ◽  
Author(s):  
Douglas M. Stone
Keyword(s):  
Multiple Regression ◽  
Basal Area ◽  
Stand Density ◽  
Analysis Of Covariance ◽  
Stepwise Multiple Regression ◽  
Diameter Growth ◽  
Site Conditions ◽  
Basal Area Growth ◽  
Initial Diameter ◽  
Area Growth

A 48-year-old stand of Acersaccharum Marsh. and A. rubrum L. in northeastern Wisconsin, U.S.A., was fertilized with 168 kg/ha (150 lb/acre) of elemental N, P, N + P, or N + P + K in May 1966. Trees were stratified by crown class and initial diameter. Ten-year diameter and basal area growth were evaluated by analysis of covariance with initial plot basal area (IBA) as the covariate and by stepwise multiple regression in hierarchal models. Both diameter and basal area growth were influenced greatly by initial diameter and stand density. IBA accounted for 65% of the variation in diameter growth and 49% of the variation in basal area growth.Fertilization decreased diameter growth and increased mortality of suppressed trees. Pole-sized maples in intermediate and codominant crown positions tended to respond to fertilization with N and N + P but the differences were not statistically significant. Dominant trees grew more than did intermediates or codominants, but fertilization response could not be evaluated. Treatment effects were confounded by widely varied stand and site conditions. Results illustrate conditions likely to be encountered in fertilizing northern hardwoods on an operational scale.

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