Log in

Relevant bibliographies by topics / Basal diameter / Journal articles

To see the other types of publications on this topic, follow the link: Basal diameter.

Journal articles on the topic 'Basal diameter'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Basal diameter.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Gregoire, T. G., S. M. Zedaker, and N. S. Nicholas. "Modeling relative error in stem basal area estimates." Canadian Journal of Forest Research 20, no. 5 (1990): 496–502. http://dx.doi.org/10.1139/x90-065.

Full text

Abstract:

The computed estimate of basal area was the focus of this investigation into the accuracy of tree diameter measurements. Diameter at breast height was measured on 101 trees, the breast height disc was removed from the stem, and each disc outline was then digitized to determine its actual area. Actual areas were compared with the basal areas computed with the field measurements of diameter by expressing the deviations as a proportion of the actual areas. These relative errors averaged 3.1% when basal area was computed with a taped diameter at breast height, and they averaged −2.5% when the mean

APA, Harvard, Vancouver, ISO, and other styles

2

Vásconez, Norma Lara, Janneth Morocho, Santiago Lara, et al. "Evaluacion De Dos Instrumentos De Medicion En La Determinación Del Área Basal En Pinus Radiata." European Scientific Journal, ESJ 13, no. 24 (2017): 10. http://dx.doi.org/10.19044/esj.2017.v13n24p10.

Full text

Abstract:

This study compares the diameter of data obtained from utilizing two measuring instruments (the caliper and diameter tape). This instrument is the two most commonly used instruments for measuring tree diameters in forest inventory procedures. The measurement of diameter has a high implication in the estimation of the basal area and stand volume. It is therefore imperative to ensure accurate measurement of the diameter of trees in a stand. This work evaluated data taken with these two diameter measuring instruments. In order to evaluate the performance of the measuring instruments, parallel mea

APA, Harvard, Vancouver, ISO, and other styles

3

Lappi, Juha, and Robert L. Bailey. "Estimation of the Diameter Increment Function or Other Tree Relations Using Angle-Count Samples." Forest Science 33, no. 3 (1987): 725–39. http://dx.doi.org/10.1093/forestscience/33.3.725.

Full text

Abstract:

Abstract A formula is derived for the bias when an angle-count sample is used to estimate the mean of a tree variable that is correlated with the breast height diameter. This bias occurs, for instance, if average increment is estimated with increment cores from an angle-count sample. Estimation of mean increment for a given initial diameter is studied further by assuming that increments are log-normally distributed, in which case the sampling distribution is a mixture of three log-normal distributions. An estimate obtained by weighting observations inversely to the basal area (i.e., with the e

APA, Harvard, Vancouver, ISO, and other styles

4

Usta, Ayhan, Ibrahim Turna, Esengül Genc, Yavuz Okunur Kocamanoglu, Selvinaz Yilmaz, and Murat Yilmaz. "Utjecaj intenziteta prorjeda na rast azijske bukve (Fagus orientalis Lipsky) u plantažama u Trabzonu na sjeveroistoku Turske." Šumarski list 143, no. 5-6 (2019): 231–40. http://dx.doi.org/10.31298/sl.143.5-6.4.

Full text

Abstract:

In this study, the effects of first thinnings having different intensities in oriental beech (Fagus orientalis Lipsky) plantation areas were investigated in terms of diameter and height growth of trees. Sample plots were chosen from oriental beech plantation areas which are within the boundaries of Maçka–Yeşiltepe and Vakf&#305;kebir districts of Trabzon province, Turkey. With removing of 0%, 10%, 25% and 40% of basal area in a hectare of stands which are in sapling stage, sample plots were established by applying thinnings which are in four different intensities (control, light, moderate,

APA, Harvard, Vancouver, ISO, and other styles

5

Knowe, Steven A., G. Sam Foster, Randall J. Rousseau, and Warren L. Nance. "Eastern cottonwood clonal mixing study: predicted diameter distributions." Canadian Journal of Forest Research 24, no. 2 (1994): 405–14. http://dx.doi.org/10.1139/x94-054.

Full text

Abstract:

A parameter recovery procedure for the Weibull distribution function was modified to incorporate monocultures and mixtures of eastern cottonwood (Populusdeltoides Bartr.) clones planted in Mississippi and Kentucky. Components of the system included functions to predict stand-level basal area and four percentiles (0th, 25th, 50th, and 95th) of the cumulative diameter distribution. Basal area was predicted as a function of surviving number of trees, dominant height, age, planting location, and the proportion of each clone planted. Clonal proportions, which accounted for 3.6% of the variation in

APA, Harvard, Vancouver, ISO, and other styles

6

Weatherhead, Donald J., Roger C. Chapman, and John H. Bassman. "Properties of the quadratic mean diameter in balanced diameter distributions." Canadian Journal of Forest Research 15, no. 2 (1985): 474–76. http://dx.doi.org/10.1139/x85-077.

Full text

Abstract:

Balanced diameter distributions are widely used to describe stand structure goals for residual growing stock in uneven-aged forests. The quadratic mean diameter is frequently used as a descriptor of a balanced diameter distribution. In this paper the quadratic mean diameter is shown to be independent of stand basal area for balanced diameter distributions with a common class width, maximum and minimum diameters, and de Liocourt's q ratio. Additionally it is shown that the quadratic mean diameter is relatively insensitive to changes in maximum tree size and q ratios for q ratios 1.5 and larger.

APA, Harvard, Vancouver, ISO, and other styles

7

Filip, Gregory M., J. J. Colbert, C. G. Shaw III, Paul F. Hessburg, and Kevin P. Hosman. "Influence of Dwarf Mistletoe and Western Spruce Budworm on Growth and Mortality of Douglas-Fir in Unmanaged Stands." Forest Science 39, no. 3 (1993): 465–77. http://dx.doi.org/10.1093/forestscience/39.3.465.

Full text

Abstract:

Abstract Permanent inventory plots in 94 unmanaged stands of primarily Douglas-fir (Pseudotsuga menziesii) on three national forests in Oregon and Washington were examined for growth suppression caused by dwarf mistletoe (Arceuthobium douglasii) and western spruce budworm (Choristoneura occidentalis). Ten-year increments of diameter and basal area were calculated from measurements in 1977-1987. Severity of dwarf mistletoe was scored using the six-class system. Severity and duration of defoliation were determined from aerial maps drawn over a 20-yr period. Dwarf mistletoe significantly decrease

APA, Harvard, Vancouver, ISO, and other styles

8

vanDam, Bastiaan, Cihan Demirci, Hans J. Reitsma, et al. "Alterations in Nitric Oxide Activity and Sensitivity in Early Streptozotocin-Induced Diabetes Depend on Arteriolar Size." International Journal of Experimental Diabetes Research 1, no. 3 (2000): 221–32. http://dx.doi.org/10.1155/edr.2000.221.

Full text

Abstract:

Changes in NO activity may play an important role in the early increase in microvascular flow that has been implicated in the pathogenesis of diabetic microangiopathy. We assessed, in thein situspinotrapezius muscle preparation of 6 weeks' streptozotocin-diabetic rats (n= 6) and of agematched controls (n= 8), basal inside diameters of A2–A4 arterioles and the reactivity to topically applied acetylcholine and nitroprusside, before and afterNG-nitro-L-arginine. In diabetic rats, cholinergic vasodilatation in A2–A4 arterioles was intact. Basal diameter in A3 and A4 arterioles was significantly hi

APA, Harvard, Vancouver, ISO, and other styles

9

Bechtold, William A. "Largest-Crown-Width Prediction Models for 53 Species in the Western United States." Western Journal of Applied Forestry 19, no. 4 (2004): 245–51. http://dx.doi.org/10.1093/wjaf/19.4.245.

Full text

Abstract:

Abstract The mean crown diameters of stand-grown trees 5.0-in. dbh and larger were modeled as a function of stem diameter, live-crown ratio, stand-level basal area, latitude, longitude, elevation, and Hopkins bioclimatic index for 53 tree species in the western United States. Stem diameter was statistically significant in all models, and a quadratic term for stem diameter was required for some species. Crown ratio and/or Hopkins index also improved the models for most species. A term for stand-level basal area was not generally needed but did yield some minor improvement for a few species. Coe

APA, Harvard, Vancouver, ISO, and other styles

10

A., Balasubramanian, N. Hari Prasath C., Radhakrishnan S., and Manivasakan S. "Comparision of Growth Performance in Timber Tree Species Cultivated under Drip Irrigation on Farm Lands." International Journal of Plant & Soil Science 16, no. 4 (2017): 1–4. https://doi.org/10.9734/IJPSS/2017/33913.

Full text

Abstract:

A field experiment was conducted at Forest College and Research Institute, Mettupalayam, Tamil Nadu, India to study the growth performance of <em>Neolamarckia cadamba</em>, <em>Acrocarpus fraxinifolius</em> and <em>Dalbergia sissoo</em> under drip irrigation. The biometric attributes <em>viz</em>., height, basal diameter and diameter at breast height (DBH) were studied during 3 month after planting (MAP), 6 MAP, 9 MAP and 12 MAP. Among the three fast growing tree species, <em>Neolamarckia cadamba </em>exhibited a maximum height of 4.40 m, basal diameter of 5.31 cm and DBH of 5.03 cm followed b

APA, Harvard, Vancouver, ISO, and other styles

11

Yang, Yong-Chi, and Chao-Huan Wang. "Expectations and Variances of Basal Area Estimates Using Remeasured Horizontal Line Sampling." Forest Science 33, no. 1 (1987): 174–84. http://dx.doi.org/10.1093/forestscience/33.1.174.

Full text

Abstract:

Abstract This paper presents the expectations and variances of the estimators of basal area and basal area growth using the remeasured horizontal line sampling. The estimators are classified by fixed diameter factor method and variable diameter factor method, and the former is further subdivided into direct and indirect methods. Variances were compared on one actual forest and two hypothetical forests simulated by computer. The basal area results reveal that (1) the estimator based on the fixed diameter factor method has smaller variance than that of the variable diameter factor method for the

APA, Harvard, Vancouver, ISO, and other styles

12

Zhang, Guo Jun, Cheng He Wang, Min Hua Zhao, Wan Qi Wang, and Jun Ming Yang. "Seedling Growth Characteristics of 24 Provenances of Larix principis-rupprechtii." Advanced Materials Research 1073-1076 (December 2014): 1099–103. http://dx.doi.org/10.4028/www.scientific.net/amr.1073-1076.1099.

Full text

Abstract:

Seedling growth traits of 24 provenances of Larix principis-rupprechtii were analyzed to select superior provenances. Variance and correlation on height, basal diameter, root length, root and stem fresh weight of 1-year old and 2-year old seedlings of those provenances were analyzed. Then correlation coefficients between these growth traits and membership value of height and basal diameter of 24 provenances were carried on. Results showed that variance on growth traits of 1-year old seedlings among 24 provenances were only significant for height, but for basal diameter, height, root and stem f

APA, Harvard, Vancouver, ISO, and other styles

13

Lynch, Thomas B., and John W. Moser. "A Growth Model for Mixed Species Stands." Forest Science 32, no. 3 (1986): 697–706. http://dx.doi.org/10.1093/forestscience/32.3.697.

Full text

Abstract:

Abstract A technique for predicting stand tables for each of two species groups in a mixed species stand was developed. Future stand conditions for each species group are determined by integrating a system of differential equations which relate rates of change in per acre values of basal area, sum of diameters, and numbers of trees to current amounts of basal area, sum of diameters, and numbers of trees. Solutions to the system at future times include estimates of basal area, sum of diameters, and number of trees for each species group. Parameter recovery is used to obtain the Weibull diameter

APA, Harvard, Vancouver, ISO, and other styles

14

Murphy, Paul A., and Robert M. Farrar. "A Framework for Stand Structure Projection of Uneven-Aged Loblolly-Shortleaf Pine Stands." Forest Science 34, no. 2 (1988): 321–32. http://dx.doi.org/10.1093/forestscience/34.2.321.

Full text

Abstract:

Abstract A growth and yield model for uneven-aged loblolly-shortleaf pine (Pinus taeda L.-Pinus echinata Mill.) was developed. Stand-level equations for merchantable basal area, sawtimber basal area, quadratic mean diameter, and maximum tree diameter were derived first. Parameters for the doubly truncated Weibull distribution were obtained by the "parameter recovery" technique by using estimates of maximum diameter, quadratic mean diameter, and the sawtimber-merchantable basal area ratio. Compatibility for basal area estimates is thus maintained between the stand-level estimates and those prod

APA, Harvard, Vancouver, ISO, and other styles

15

Šálek, L., and D. Zahradník. "Wedge prism as a tool for diameter and distance measurement." Journal of Forest Science 54, No. 3 (2008): 121–24. http://dx.doi.org/10.17221/3033-jfs.

Full text

Abstract:

The wedge prism, which is generally used for the measurement of basal area in diameter at breast height, is also a tool for the measurement of distance as well as for the measurement of diameters at a certain height of the stem, in the upper stem. Measurements using the wedge prism are based on the same principle as measurements using Bitterlich mirror relascope. This method is appropriate for non-destructive determination of stem volume. Moreover, the wedge prism can be used for the sorting of logs in standing trees when the small end of expectant assortment has to be known. As the wedge pris

APA, Harvard, Vancouver, ISO, and other styles

16

Thomas, V., R. D. Oliver, K. Lim, and M. Woods. "LiDAR and Weibull modeling of diameter and basal area." Forestry Chronicle 84, no. 6 (2008): 866–75. http://dx.doi.org/10.5558/tfc84866-6.

Full text

Abstract:

This study investigates the ability to predict forest diameter distributions from light detection and ranging (LiDAR) data using Weibull modelling for forest stands in central Ontario. Results suggest that the unimodal 2-parameter Weibull model is a promising technique for the prediction of diameter class distributions, with strong relationships evident for several subgroups (at 95% confidence, r2adj=0.83, 0.78, 0.88, 0.80, 0.83, and 0.65, with validation RMSE of 4.09 m2/ha, 0.61 stems/ha, 6.05, 0.64, 4.73, and 0.09 for basal area, stem density, and the Weibull a and b parameters for basal are

APA, Harvard, Vancouver, ISO, and other styles

17

Deluca, Travis, Mary Ann Fajvan, and Gary Miller. "Diameter-Limit Harvesting: Effects of Residual Trees on Regeneration Dynamics in Appalachian Hardwoods." Northern Journal of Applied Forestry 26, no. 2 (2009): 52–60. http://dx.doi.org/10.1093/njaf/26.2.52.

Full text

Abstract:

Abstract Ten-years after diameter-limit harvesting in an Appalachian hardwood stand, the height, dbh, and basal area of sapling regeneration was inversely related to the degree of “overtopping” of residual trees. Black cherry and red maple were the most abundant saplings with 416.5 ± 25.7 and 152.9 ± 16.8 stems per acre, respectively. Models of black cherry height and diameter showed significant negative relationships (P < 0.05) with residual tree basal area. In addition, height, diameter, and basal area of dominant and codominant black cherry and black birch saplings were inversely related

APA, Harvard, Vancouver, ISO, and other styles

18

Yuan, Bo, Ya-Lei Pi, Ya-Nan Zhang, Peng Xing, He-Meng Chong, and Hui-Feng Zhang. "A diagnostic model of idiopathic central precocious puberty based on transrectal pelvic ultrasound and basal gonadotropin levels." Journal of International Medical Research 48, no. 8 (2020): 030006052093527. http://dx.doi.org/10.1177/0300060520935278.

Full text

Abstract:

Objective To establish a diagnostic model of idiopathic central precocious puberty on the basis of transrectal pelvic ultrasound and basal gonadotropin. Methods A total of 669 girls with Tanner breast development stage II were enrolled in this study from January 2015 to December 2018. The participants were divided into the ICPP group and the premature thelarche group. We analyzed various variables, including age at initial diagnosis, basal luteinizing hormone levels, the long diameter of the uterus, the transverse diameter of the uterus, the anterior–posterior diameter of the uterus, the volum

APA, Harvard, Vancouver, ISO, and other styles

19

Sprinz, Peter T., and Harold E. Burkhart. "Relationships between tree crown, stem, and stand characteristics in unthinned loblolly pine plantations." Canadian Journal of Forest Research 17, no. 6 (1987): 534–38. http://dx.doi.org/10.1139/x87-089.

Full text

Abstract:

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 b

APA, Harvard, Vancouver, ISO, and other styles

20

Grenier, Yvon, and France Lapointe. "Précisons sur les facteurs d'arbre utilisés lors d'inventaires par points d'échantillonnage des peuplements inéquiennes." Forestry Chronicle 67, no. 4 (1991): 389–92. http://dx.doi.org/10.5558/tfc67389-4.

Full text

Abstract:

This paper presents six tree factor tables, for basal area factors of 2, 3 and 4 m2/ha and diameter classes of 2 and 10 cm. They can be used for point sampling inventories of unevenaged stands while the purpose is to estimate the number of stems by diameter class. We used a method based on the fact that diameters in a diameter class do not have equal weights. One can calculate tree factor in a more precise manner that what could have been done with traditional method. Key words: diameter class, tree factor, unevenaged structure.

APA, Harvard, Vancouver, ISO, and other styles

21

Deal, Robert L., Paul E. Hennon, Ewa H. Orlikowska, and David V. D'Amore. "Stand dynamics of mixed red alder conifer forests of southeast Alaska." Canadian Journal of Forest Research 34, no. 4 (2004): 969–80. http://dx.doi.org/10.1139/x04-002.

Full text

Abstract:

Stand structure and dynamics were evaluated in mixed red alder (Alnus rubra Bong.) conifer forests of southeast Alaska. We assessed stand development, tree density, total basal area, diameter distribution of live and dead trees, height distribution of live trees, and mean diameter of all and largest conifers in 40-year-old red alder conifer stands that developed following logging. Forty-five plots were established in nine stands sampled across a com po si tional range of 0%86% alder. Alder height growth was initially rapid then slowed considerably, whereas conifer height growth was initia

APA, Harvard, Vancouver, ISO, and other styles

22

Poage, Nathan J., and John C. Tappeiner, II. "Long-term patterns of diameter and basal area growth of old-growth Douglas-fir trees in western Oregon." Canadian Journal of Forest Research 32, no. 7 (2002): 1232–43. http://dx.doi.org/10.1139/x02-045.

Full text

Abstract:

Diameter growth and age data collected from stumps of 505 recently cut old-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees at 28 sample locations in western Oregon (U.S.A.) indicated that rapid early and sustained growth of old Douglas-fir trees were extremely important in terms of attaining large diameters at ages 100300 years. The diameters of the trees at ages 100300 years (D100D300) were strongly, positively, and linearly related to their diameters and basal area growth rates at age 50 years. Average periodic basal area increments (PAIBA) of all trees increased for the f

APA, Harvard, Vancouver, ISO, and other styles

23

Olsen, W. K., J. M. Schmid, and S. A. Mata. "Stand Characteristics Associated with Mountain Pine Beetle Infestations in Ponderosa Pine." Forest Science 42, no. 3 (1996): 310–27. http://dx.doi.org/10.1093/forestscience/42.3.310.

Full text

Abstract:

Abstract Stand characteristics associated with mountain pine beetle (Dendroctonus ponderosae Hopkins), infestations within a 2.15 ac (0.87 ha) plot were analyzed to determine characteristics most strongly correlated with the infestations. Trees per acre, basal area, quadratic mean diameter, minimum diameter, and the range of diameters in MPB infested groups were significantly different from those in noninfested groups. Maximum diameter was not different between infested and noninfested groups. The results are discussed in regard to the mountain pine beetle-host relationship and stand managemen

APA, Harvard, Vancouver, ISO, and other styles

24

McTague, John P., and Robert L. Bailey. "Compatible Basal Area and Diameter Distribution Models for Thinned Loblolly Pine Plantations in Santa Catarina, Brazil." Forest Science 33, no. 1 (1987): 43–51. http://dx.doi.org/10.1093/forestscience/33.1.43.

Full text

Abstract:

Abstract A simultaneous basal area growth and yield model based on diameter percentiles is developed. It is suggested that the diameter distribution percentiles essentially provide a description of the past stand history. The subsequent growth of a thinned or unthinned stand is affected by the shape and position of the diameter distribution percentiles. A noniterative technique is demonstrated for recovering the Weibull distribution parameters and generating a diameter distribution consistent with basal area. For. Sci. 33(1):43-51.

APA, Harvard, Vancouver, ISO, and other styles

25

Haastrup, N. O., O. W. Bolaji, T. A. Narudeen, et al. "Description and Composition of Tree Species in a Tertiary Institution Agricultural Faculty Arboretum, Ibadan, South-West Nigeria." Journal of Applied Sciences and Environmental Management 26, no. 6 (2022): 1163–72. http://dx.doi.org/10.4314/jasem.v26i6.25.

Full text

Abstract:

The Arboretum of the Agricultural Faculty of a tertiary institution in Ibadan is known for its rich diversity of trees. Therefore, the study investigates the tree growth variables in the arboretum such as diameter at breast height (dbh), diameter at the base, middle and top of the bole, total height, merchantable height and crown diameter. The basal area and volume were then calculated per species and per family. Several models were fitted for the height – diameter relationship and crown diameter – diameter relationship and crown diameter – dbh relationship. Positive linear relationships were

APA, Harvard, Vancouver, ISO, and other styles

26

Ertaş, Aytekin, and Muhammed Ali Aydın. "The Effects Of The First Thinning On Stand Structure In Oak and Hornbeam Mixed Stands." Düzce Üniversitesi Orman Fakültesi Ormancılık Dergisi 21, no. 1 (2025): 425–41. https://doi.org/10.58816/duzceod.1606680.

Full text

Abstract:

This study, conducted in Istanbul's Belgrad Forest, examines the effects of thinning on stand dynamics. In 2017, a moderate to heavy thinning intervention was implemented in a mixed stand of sessile oak (Quercus petraea) and common hornbeam (Carpinus betulus). Changes in diameter and basal area increments, stand stratification, and vitality (health condition) were analyzed over a two-year period following the intervention. The study employed a randomized design with control and treatment groups. During thinning, 0% (control) and 15–20% (moderate) of the basal area were removed from the stand.

APA, Harvard, Vancouver, ISO, and other styles

27

Thomas, Charles E., and Bernard R. Parresol. "Comparing Basal Area Growth Rates in Repeated Inventories: Simpson's Paradox in Forestry." Forest Science 35, no. 4 (1989): 1029–39. http://dx.doi.org/10.1093/forestscience/35.4.1029.

Full text

Abstract:

Abstract Recent analyses of radial growth rates in southern commercial forests have shown that current rates are lower than past rates when compared diameter class by diameter class. These results have been interpreted as an indication that the growth rate of the forest is declining. In this paper, growth rates of forest populations in Alabama are studied. Basal area growth (a function of both radius and radial growth squared) by diameter classes is examined for plantation and natural stands. Basal area growth and population distributions for the 1962-1972 and 1972-1982 measurement periods are

APA, Harvard, Vancouver, ISO, and other styles

28

Ikenaga, H., R. W. Fallet, and P. K. Carmines. "Basal nitric oxide production curtails arteriolar vasoconstrictor responses to ANG II in rat kidney." American Journal of Physiology-Renal Physiology 271, no. 2 (1996): F365—F373. http://dx.doi.org/10.1152/ajprenal.1996.271.2.f365.

Full text

Abstract:

Experiments were performed to test the hypothesis that renal arteriolar vasoconstrictor responses to angiotensin II (ANG II) are curtailed through a mechanism that involves stimulation of endogenous nitric oxide (NO) synthesis. The in vitro blood-perfused juxtamedullary nephron technique was exploited to monitor arteriolar lumen diameter responses to exogenous ANG II before and during treatment with the NO synthase inhibitor N omega-nitro-L-arginine (L-NNA). Under control conditions, 1 nM ANG II reduced afferent and efferent arteriolar diameters by 13 and 11%, respectively. In the presence of

APA, Harvard, Vancouver, ISO, and other styles

29

Federer, C. Anthony, and James W. Hornbeck. "Expected decrease in diameter growth of even-aged red spruce." Canadian Journal of Forest Research 17, no. 3 (1987): 266–69. http://dx.doi.org/10.1139/x87-045.

Full text

Abstract:

Weibull functions provide close least square fits to tables for stand basal area and density versus age in even-aged, second-growth red spruce as reported by W. H. Meyer (USDA Tech. Bull. No. 142. 1929). The annual mean radial and basal area increments of the trees can be calculated from the two Weibull functions. For a stand following Meyer's tables and reaching breast height in 1915, mean tree basal area increment increases steadily to a maximum in the early 1960's and then declines; mean radial increment is constant from 1925 to 1955 and then declines rapidly. This behavior matches very clo

APA, Harvard, Vancouver, ISO, and other styles

30

Sahid, S. "Penafsiran Luas Bidang Dasar Tegakan Pinus Merkusii menggunakan Foto Udara di Kesatuan Pemangkuan Hutan (KPH) Kedu Perum Perhutani Unit 1 Jawa Tengah." Forum Geografi 23, no. 2 (2009): 112. http://dx.doi.org/10.23917/forgeo.v23i2.5005.

Full text

Abstract:

The research aim to estimate the basal area of Pinus merkusii combired comprises measurement by aerial photograph with scale of 1:20.000 field and to measurement field. The stand parameters measured are the number of the trees per hectare (N), the tree height (H) and crown diameter (D). Whereas, estimation of the stand basal area was based on the measurement of the stem diameter in the permanent plots. The result of the regression analysis showed that the based area of the Pinus merkusii stand (lbds) had correlation with the number of the trees per hectare (N), the tree height (H) and crown di

APA, Harvard, Vancouver, ISO, and other styles

31

Amateis, Ralph L., Harold E. Burkhart, and Thomas E. Burk. "A Ratio Approach to Predicting Merchantable Yields of Unthinned Loblolly Pine Plantations." Forest Science 32, no. 2 (1986): 287–96. http://dx.doi.org/10.1093/forestscience/32.2.287.

Full text

Abstract:

Abstract A stand-level ratio model is presented which uses the stand attributes age, site index, basal area, and number of surviving trees per acre to portion total stand yield to any desired top diameter and/or threshold dbh limit. A model is also presented which distributes the total number of trees by diameter such that the basal area is consistent with total stand basal area. Comparisons with two Weibull-based diameter distribution approaches showed the ratio approach to be a practical and satisfactory alternative. Coefficients for the equations were developed for unthinned old-field and c

APA, Harvard, Vancouver, ISO, and other styles

32

Houètchégnon, Towanou, Dossou Seblodo Judes Charlemagne Gbèmavo, Christine Ajokè Ifètayo Nougbodé Ouinsavi, and Nestor Sokpon. "Structural Characterization ofProsopis africanaPopulations (Guill., Perrott., and Rich.) Taub in Benin." International Journal of Forestry Research 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/101373.

Full text

Abstract:

The structural characterization ofProsopis africanaof Benin was studied on the basis of forest inventory conducted in three different vegetation types (savannah, fallow, and field) and three climate zones. The data collected in 139 plots of 1000 m2each related to the diameter at breast (1.3 m above ground), total height, identification, and measurement of DBH relatedP. africanaspecies height. Tree-ring parameters such as Blackman and Green indices, basal area, average diameter, height of Lorey, and density were calculated and interpreted. Dendrometric settings of vegetation type and climate zo

APA, Harvard, Vancouver, ISO, and other styles

33

Zhang, Xiaoping, Bo Zeng, and Zhangcheng Zhong. "Differential responsiveness in stem height and diameter growth of two Ficus tree species in the Three Gorges reservoir region of China as affected by branch removal." Canadian Journal of Forest Research 37, no. 9 (2007): 1748–54. http://dx.doi.org/10.1139/x07-030.

Full text

Abstract:

In the Three Gorges reservoir region of China, Ficus microcarpa L. and Ficus virens Ait. var. sublanceolata (Miq.) Corner (Moraceae) are widely used in greening and ecological restoration following construction, including roads, railways, towns, etc. Branch cuttings are used for cultivating saplings of these trees. We conducted a 4 year experiment that included four branch-removal intensities to evaluate the influence of branch removal on stem height and diameter growth of these Ficus spp. It was found that branch removal did not affect the stem height growth of either F. microcarpa or F. vire

APA, Harvard, Vancouver, ISO, and other styles

34

Youngblood, Andrew P., and John C. Zasada. "White spruce artificial regeneration options on river floodplains in interior Alaska." Canadian Journal of Forest Research 21, no. 4 (1991): 423–33. http://dx.doi.org/10.1139/x91-057.

Full text

Abstract:

Reforestation options for artificial regeneration of white spruce (Piceaglauca (Moench) Voss) were tested on three floodplain sites near Fairbanks, Alaska. Survival of containerized seedlings after outplanting was above 96%, regardless of harvest cutting method or mechanical site preparation, and declined little between the third and fifth growing seasons. Establishment and survival after direct seeding on seed spots was more variable and differed by harvest cutting method, by type of site preparation, and by the use of plastic seed shelters for seedling protection. Maximum terminal leader gro

APA, Harvard, Vancouver, ISO, and other styles

35

Bechtold, William A. "Crown-Diameter Prediction Models for 87 Species of Stand-Grown Trees in the Eastern United States." Southern Journal of Applied Forestry 27, no. 4 (2003): 269–78. http://dx.doi.org/10.1093/sjaf/27.4.269.

Full text

Abstract:

Abstract The mean crown diameters of stand-grown trees were modeled as a function of stem diameter, live-crown ratio, stand basal area, latitude, longitude, elevation, and Hopkins bioclimatic index for 87 tree species in the eastern United States. Stem diameter was statistically significant in all models, and a quadratic term for stem diameter was required for some species. Crown ratio and/or Hopkins index also improved the models for many species. Coefficients of variation from the regression solutions ranged from 18 to 35%, and model r-square values ranged from 0.15 to 0.88. Simpler models,

APA, Harvard, Vancouver, ISO, and other styles

36

Lynch, Thomas B., and Difei Zhang. "On Relative Maxima of Diameter Growth, Basal Area Growth, Volume Growth, and Mean Annual Increment for Individual Trees." Forest Science 57, no. 4 (2011): 353–58. http://dx.doi.org/10.1093/forestscience/57.4.353.

Full text

Abstract:

Abstract A mathematical demonstration for the fact that maximum individual tree diameter growth occurs at an earlier age than maximum individual tree basal area growth is reviewed. This demonstration assumes that the growth functions are continuous, are twice differentiable with respect to age, and increase monotonically to one maximum, thereafter to decline monotonically. The relationship of the age of maximum individual tree volume growth to the age of basal area growth is also discussed. Mathematical demonstrations are given for the fact that the culmination of mean annual increment occurs

APA, Harvard, Vancouver, ISO, and other styles

37

Ceballos, Sergio Javier, and Agustina Malizia. "Liana density declined and basal area increased over 12 y in a subtropical montane forest in Argentina." Journal of Tropical Ecology 33, no. 4 (2017): 241–48. http://dx.doi.org/10.1017/s0266467417000153.

Full text

Abstract:

Abstract:Changes in density and basal area of lianas ≥2 cm diameter were monitored in two 1-ha permanent plots in a subtropical montane mature forest of north-western Argentina. Liana stems were identified and measured at 130 cm from the main rooting point in two censuses conducted in 2003 and 2015. Between censuses, the density of liana stems decreased 13.3%, while basal area increased 11.5%. Density and basal area decreased mainly among lianas of 2–3 cm diameter, but increased in lianas ≥4 cm diameter. Quechualia fulta (Asteraceae), Serjania meridionalis (Sapindaceae) and Chamissoa altissima

APA, Harvard, Vancouver, ISO, and other styles

38

Hansen, Gerald D., and Ralph D. Nyland. "Effects of diameter distribution on the growth of simulated uneven-aged sugar maple stands." Canadian Journal of Forest Research 17, no. 1 (1987): 1–8. http://dx.doi.org/10.1139/x87-001.

Full text

Abstract:

Effects of diameter distribution on the growth of simulated uneven-aged sugar maple (Acersaccharum Marsh.) stands are described using output from a computer simulation model. Results indicate that the combination of q ratio (a constant ratio between the numbers of trees present in adjacent diameters over the entire range of size classes present), maximum tree size, and basal area should vary depending on management objectives and cutting cycle length. A ratio of 1.2 appears best for describing a diameter distribution to maximize growth of large sawtimber, but larger q ratios are needed in the

APA, Harvard, Vancouver, ISO, and other styles

39

Šušić, Nikola, Martin Bobinac, and Siniša Andrašev. "Effects of two different thinning methods on the diameter and basal area increments of silver lime (Tilia tomentosa Moench) target trees in Fruška Gora (Serbia)." Annals of Forest Research 65, no. 2 (2022): 3–14. http://dx.doi.org/10.15287/afr.2022.2392.

Full text

Abstract:

This paper analyses the cumulative effects of selective thinning and thinning from below on diameter and basal area increments of target trees after 25/26 years in 52, 69- and 86-year-old silver lime (Tilia tomentosa Moench) stands. Two target tree collectives were analysed: (1) elite trees selected between 1993–1994 from permanent sampling plots (selective thinning method), and (2) a ‘comparable collective’ of target trees selected in 2019 (25/26 years later) according to the same criteria as the elite trees, in the same stands thinned from below. Elite trees that were selectively thinned had

APA, Harvard, Vancouver, ISO, and other styles

40

Knoebel, Bruce R., Harold E. Burkhart, and Donald E. Beck. "A Growth and Yield Model for Thinned Stands of Yellow-Poplar." Forest Science 32, suppl_2 (1986): a0001—z0002. http://dx.doi.org/10.1093/forestscience/32.s2.a0001.

Full text

Abstract:

Abstract Simultaneous growth and yield equations were developed for predicting basal area growth and cubic-foot volume growth and yield in thinned stands of yellow-poplar. A joint loss function involving both volume and basal area was used to estimate the coefficients in the system of equations. The estimates obtained were analytically compatible, invariant for projection length, and numerically equivalent with alternative applications of the equations. Given estimates of basal area and cubic-foot volume from these equations, board-foot volumes can also be calculated. As an adjunct to the stan

APA, Harvard, Vancouver, ISO, and other styles

41

Biging, Greg S., and Lee C. Wensel. "The Effect of Eccentricity on the Estimation of Basal Area and Basal Area Increment of Coniferous Trees." Forest Science 34, no. 3 (1988): 621–33. http://dx.doi.org/10.1093/forestscience/34.3.621.

Full text

Abstract:

Abstract A sample of noncircular tree cross-sections was examined to determine basal area and basal area increment. Basal area estimates were calculated with a circular model from single measurements of diameter and from averages of two diameter measurements. Basal area increment estimates were made with several geometric models from single measurements of radial increment and averages of two measurements of radial increment. Commonly used tree cross-sectional area estimates investigated were biased, usually overestimating basal area. Several generalized geometric models of area increment were

APA, Harvard, Vancouver, ISO, and other styles

42

Gove, Jeffrey H., and Ganapathi P. Patil. "Modeling the Basal Area-size Distribution of Forest Stands: A Compatible Approach." Forest Science 44, no. 2 (1998): 285–97. http://dx.doi.org/10.1093/forestscience/44.2.285.

Full text

Abstract:

Abstract This paper presents a methodology that allows diameter distributions to be conformably modeled by letting the probability density represent either tree frequency as in the classic case, or basal area. The key to relating the two forms of the probability density is shown to lie in weighted distribution theory. The motivation for the relationship lies in the quadratic relationship between diameter at breast height and basal area. The weighted distribution approach is shown to be compatible with current methods of calculating quantities such as basal area by diameter class, but in additi

APA, Harvard, Vancouver, ISO, and other styles

43

Sánchez-González, Mariola, Miguel Cabrera, Pedro Javier Herrera, Roberto Vallejo, Isabel Cañellas, and Fernando Montes. "Basal Area and Diameter Distribution Estimation Using Stereoscopic Hemispherical Images." Photogrammetric Engineering & Remote Sensing 82, no. 8 (2016): 605–16. http://dx.doi.org/10.14358/pers.82.8.605.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Sharma, Rajesh, Sanjeev Kumar, K. Thakur, and Surinder Kumar. "Estimates of genetic parameters from an open pollinated progeny test of Shisham (Dalbergia sissoo Roxb.)." Indian Journal of Forestry 30, no. 3 (2007): 273–78. http://dx.doi.org/10.54207/bsmps1000-2007-uwl6ui.

Full text

Abstract:

Genetic parameters were estimated from 7-yr old open pollinated progeny test of Shisham. The results indicated presence of significant amount of genetic variation in the materials studied. Height, diameter and basal area were found to be under the control of additive gene action as evidenced by their high values of individual tree heritability. The genetic gain values followed a similar trend. Height, diameter and basal area exhibited positive and significant genetic correlation. Of the 25 clones tested 13 (UPGONP-74, UPGONP-29, UPGONP-149, UPGONP-56, UPGONP-46, UPGONP-94, UPGONP-152, UPGONP-1

APA, Harvard, Vancouver, ISO, and other styles

45

Williams, Roger A. "Stand Density Index for Loblolly Pine Plantations in North Louisiana." Southern Journal of Applied Forestry 20, no. 2 (1996): 110–13. http://dx.doi.org/10.1093/sjaf/20.2.110.

Full text

Abstract:

Abstract Stand Density Index (SDI) equations and diagrams were developed and presented for loblolly pine (Pinus taeda L.) plantations in north Louisiana. Two different SDI diagrams are presented—one that utilizes the number of trees per acre and average stand diameter, and a second that uses the number of trees per acre and the basal (ft²) per acre. Basal area is presented as a second alternative to average stand diameter since many practicing foresters commonly use basal area for density management. South. J. Appl. For. 20(2):110-113.

APA, Harvard, Vancouver, ISO, and other styles

46

Groot, Arthur, and Hannu Hökkä. "Persistence of suppression effects on peatland black spruce advance regeneration after overstory removal." Canadian Journal of Forest Research 30, no. 5 (2000): 753–60. http://dx.doi.org/10.1139/x00-007.

Full text

Abstract:

The persistence of suppression effects on peatland black spruce (Picea mariana (Mill.) BSP) advance regeneration following overstory removal was examined (i) by analyzing post-harvest growth patterns and (ii) by comparing observed post-harvest growth with predictions from an individual-tree growth model. Analysis of growth patterns revealed critical points (inflections or maxima) in annual basal area, diameter, and height growth series, and in specific volume increment. Critical points occurred at different times (ranging from 1 to 29 years after harvest) for different variables and often occu

APA, Harvard, Vancouver, ISO, and other styles

47

Imig, J. D., D. Gebremedhin, D. R. Harder, and R. J. Roman. "Modulation of vascular tone in renal microcirculation by erythrocytes: role of EDRF." American Journal of Physiology-Heart and Circulatory Physiology 264, no. 1 (1993): H190—H195. http://dx.doi.org/10.1152/ajpheart.1993.264.1.h190.

Full text

Abstract:

The effect of erythrocytes (red blood cells, RBC) on vascular tone in the renal microcirculation was examined using the juxtamedullary nephron microvascular preparation perfused in vitro with a physiological salt solution containing 5% albumin. The basal diameters of the arcuate, interlobular, proximal, and distal afferent arterioles averaged 444 +/- 24, 74 +/- 3, 29 +/- 1, and 19 +/- 1 micron, respectively, when perfused with a cell-free solution at a pressure of 80 mmHg. The diameters of the arcuate and interlobular arteries increased by 14 +/- 4 and 13 +/- 4%, respectively, whereas the diam

APA, Harvard, Vancouver, ISO, and other styles

48

Eerikäinen, Kalle. "A Site Dependent Simultaneous Growth Projection Model for Pinus kesiya Plantations in Zambia and Zimbabwe." Forest Science 48, no. 3 (2002): 518–29. http://dx.doi.org/10.1093/forestscience/48.3.518.

Full text

Abstract:

Abstract The aim of this study was to create a stand level yield model for Pinus kesiya (Royle × Gordon) plantations in Zambia and Zimbabwe based on the simultaneous projection model approach. The purpose was to prepare prediction models for the measurable and allometrically related stand variables which characterize the development of planted P. kesiya stands. The modeled stand characteristics are assessable in the inventories of forest plantations and are frequently employed in traditional stand yield tables and modern growth simulators. Special attention was paid to the selection of flexibl

APA, Harvard, Vancouver, ISO, and other styles

49

Wang, Xue-Man, Yu-Tong Zhu, Juan Wang, et al. "Effects of fertilizer application on the growth of Stranvaesia davidiana D. seedlings." PeerJ 12 (January 16, 2024): e16721. http://dx.doi.org/10.7717/peerj.16721.

Full text

Abstract:

Wild plants represent a potential source of urban landscape trees. Stranvaesia davidiana Dcne. is a member of the Stranvaesia Lindl. Genus, which belongs to family Rosaceae Juss. It has great ornamental value. It can contribute to urban color foliage and fruit species. However, the most effective fertilizer application strategy required for its cultivation is unknown. Therefore, we conducted an orthogonal experiment to investigate the fertilizer type and level (pure nitrogen) using ten experimental groups, including an untreated control group. Pot experiments were used to determine the growth

APA, Harvard, Vancouver, ISO, and other styles

50

Guillemette, François, and Marie-Claude Lambert. "Relative effects of dendrometers on the estimation of diameter at breast height, stand basal area and stand volume in uneven-aged northern hardwoods." Forestry Chronicle 85, no. 3 (2009): 446–52. http://dx.doi.org/10.5558/tfc85446-3.

Full text

Abstract:

Four methods of estimating diameter at breast height (DBH) were used on 558 northern hardwood stems, located in 6, 0.25-ha plots, to compare their effects. The first method was a diameter tape reading and the second was a systematic reading, along a predefined axis, taken with a calliper. The last 2 methods were both obtained from the arithmetic mean of 2 different pairs of calliper readings taken at right angles. The first pair was directed along the major bole axis and the other pair along the minor axis. The 4 methods were compared in terms of mean tree diameter, plot basal area and plot vo

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!