Applicability evaluation of tree volume equation for Abies kawakamii (Hayata) Ito based on stem analysis data in Taiwan

Abstract Stem analysis data collected from 101 sample trees located in 12 plantations established between 1930 and 1982 throughout central Maine were used to develop total and merchantable stem volume prediction equations, and site index prediction equations for plantation-grown European larch. The inside bark merchantable volume equation (4 in. top dob and 12 ft minimum merchantable bole) using a weighted combined variable was very similar to one for Japanese larch in Pennsylvania. Site index curves from this study were identical to those developed in southern New York and New England below a breast height (bh) age of 20 yr; after bh age 20, our curves predicted increasingly greater height growth and show a 6-12 ft superiority in height at a bh age of 50. North. J. Appl. For. 10(2):70-74.

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Tree Volume and Taper of Loblolly Pine Varies by Stand Origin

Southern Journal of Applied Forestry ◽

10.1093/sjaf/11.4.185 ◽

1987 ◽

Vol 11 (4) ◽

pp. 185-189 ◽

Cited By ~ 2

Author(s):

Ralph L. Amateis ◽

Harold E. Burkhart

Keyword(s):

Pinus Taeda ◽

Loblolly Pine ◽

Analysis Data ◽

Old Field ◽

Stem Analysis ◽

Tree Form ◽

Pinus Taeda L ◽

Natural Stands ◽

Taper Equations ◽

Forest Managers

Abstract Stem analysis data were used to examine volume, height-dbh, form and taper relationships for loblolly pine (Pinus taeda L.) trees grown in unthinned old-field plantations, cutover-site plantations, and natural stands. Results showed significant differences in volume, height-dbh, tree form and taper relationships for loblolly pine grown in stands from these three origins. Thus, in order to accurately predict total and merchantable volumes as well as upper stem diameters and heights, forest managers should apply separate volume and taper equations for each stand class. South. J. Appl. For. 11(4):185-189.

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Preliminary Site Index Equations for Three Planted Species in Northern Ontario

Northern Journal of Applied Forestry ◽

10.1093/njaf/12.2.57 ◽

1995 ◽

Vol 12 (2) ◽

pp. 57-63 ◽

Cited By ~ 4

Author(s):

Bijan Payandeh ◽

Yonghe Wang

Keyword(s):

Nonlinear Analysis ◽

Black Spruce ◽

Analysis Data ◽

Site Index ◽

Analysis Of Covariance ◽

Stem Analysis ◽

Northern Ontario ◽

Natural Stand ◽

Graphical Comparison ◽

Similarities And Differences

Abstract Stem analysis data from plantations of black spruce, white spruce, and jack pine from northern Ontario were fitted to base-age specific and base-age invariant site index models. The resulting equations and their respective parameters were compared via nonlinear analysis of covariance. The base-age specific models produced a somewhat better fit to the data than their base-age invariant counterparts, although the latter are considered theoretically more elegant. Graphical comparison of plantation and natural stand site index curves for the three species showed both similarities and differences. North. J. Appl. For. 12(2):57-63.

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Comparison and Development of Height Growth and Site Index urves for Douglas-Fir in the Inland Northwest

Western Journal of Applied Forestry ◽

10.1093/wjaf/4.3.85 ◽

1989 ◽

Vol 4 (3) ◽

pp. 85-88

Author(s):

James L. Vander Ploeg ◽

James A. Moore

Keyword(s):

Pseudotsuga Menziesii ◽

Model Development ◽

Analysis Data ◽

Site Index ◽

Height Growth ◽

Douglas Fir ◽

Western Montana ◽

Stem Analysis ◽

Inland Northwest ◽

Central Idaho

Abstract Stem analysis data from Douglas-fir (Pseudotsuga menziesii) collected throughout the inland Northwest were used for testing height growth and site index equations. The equations performed well in northern and central Idaho, northeast Oregon, and northeast Washington on vegetative types similar to those sampled in model development. However, if the equations were applied on drier sites outside the original geographic study area, overestimates of height growth and under-estimates of site index could result. Therefore, revised height growth and site index equations are presented for western Montana and central Washington. West. J. Appl. For. 4(3):85-88, July 1989.

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Site Index Curves for Loblolly Pine Plantations on Cutover Site-Prepared Lands

Southern Journal of Applied Forestry ◽

10.1093/sjaf/9.3.166 ◽

1985 ◽

Vol 9 (3) ◽

pp. 166-169 ◽

Cited By ~ 17

Author(s):

Ralph L. Amateis ◽

Harold E. Burkhart

Keyword(s):

Differential Equation ◽

Pinus Taeda ◽

Loblolly Pine ◽

Analysis Data ◽

Site Index ◽

Height Growth ◽

Pine Plantations ◽

The South ◽

Stem Analysis ◽

Natural Range

Abstract Stem analysis data collected from dominant and codominant loblolly pine (Pinus taeda) trees in cutover, site-prepared plantations were used to develop site index curves. The data were collected over much of the natural range of loblolly pine. A separable differential equation which expresses height growth as a function of both height and age was used to develop the site index curves. These site index curves should be applicable to loblolly pine plantations on cutover, site-prepared lands through much of the South.1

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Application of a geometrical volume equation to species with different bole forms

Canadian Journal of Forest Research ◽

10.1139/x86-052 ◽

1986 ◽

Vol 16 (2) ◽

pp. 311-314 ◽

Cited By ~ 6

Author(s):

G. B. MacDonald ◽

R. R. Forslund

Keyword(s):

Diameter Measurement ◽

Stem Analysis ◽

Individual Tree ◽

Breast Height ◽

Centre Of Gravity ◽

Variable Equation ◽

Input Variables ◽

Volume Equation ◽

Volume Estimates ◽

Geometrical Equation

Stem analysis of 20 Abiesbalsamea (L.) Mill., 68 Piceamariana (Mill.) B.S.P., 19 Piceaglauca (Moench) Voss, 31 Populustremuloides Michx., and 37 Betulapapyrifera Marsh. revealed form variation between species. A volume equation based on the paracone (a geometrical solid midway between a paraboloid and a cone) estimated individual tree volume within 10% of the true volume (at the 95% confidence level) for all species. The input variables required were total height and diameter at a relative height of 0.2 for Betulapapyrifera and 0.3 for the other four species. If breast-height diameter was used, the effect of form variation on the accuracy of volume prediction was more pronounced. In this case, the geometrical equation modified for each species according to the average centre of gravity provided more consistently accurate volume estimates than either the paracone equation or Honer's transformed variable equation. For all species, the diameter measurement position was more critical than the version of the geometrical equation selected.

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Tarifs de cubage paramétrés: application à l'épinette noire de Lebel-sur-Quévillon

Canadian Journal of Forest Research ◽

10.1139/x90-194 ◽

1990 ◽

Vol 20 (9) ◽

pp. 1471-1478 ◽

Cited By ~ 1

Author(s):

Chhun-Huor Ung

Keyword(s):

Black Spruce ◽

Standing Stock ◽

Analysis Data ◽

Volume Estimation ◽

Allometric Model ◽

Stem Analysis ◽

Forest Region ◽

Spruce Stands ◽

The Mean ◽

The Cost

The mean ratio of height to diameter at breast height of dominant trees in a stand resulted in more accurate one-entry volume tables than general two-entry volume tables. These parametrical one-entry volume tables were established with the allometric model and Hummel's line. The values of their coefficients were estimated from stem analysis data of felled trees in black spruce stands at Lebel-sur-Quévillon. In the search for simple and effective methods to increase the reliability of standing stock estimation for managing a relatively homogeneous forest region, parametrical one-entry volume tables reduce the cost of estimating standing volume and increase the accuracy of volume estimation compared with general two-entry volume tables.

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Estimation of individual tree volumes with age and diameter

Canadian Journal of Forest Research ◽

10.1139/x83-005 ◽

1983 ◽

Vol 13 (1) ◽

pp. 32-39 ◽

Cited By ~ 4

Author(s):

Riyaz A. Sadiq ◽

Victor G. Smith

Keyword(s):

Measurement Errors ◽

Analysis Data ◽

Red Pine ◽

Stem Analysis ◽

Hilly Terrain ◽

Individual Tree ◽

Southern Ontario ◽

Standard Methods ◽

Standing Trees ◽

Individual Trees

Even though invention of high-precision equipment has reduced measurement errors associated with the estimation of heights of standing trees, height estimation is still an expensive and time-consuming operation. At times it is difficult to determine especially in dense forests or in forests located in hilly terrain. The present study advocates a volume–age–diameter function to estimate volumes of individual trees. The technique presented here circumvents measurement of tree heights through the use of age which, however, restricts the application of the function to plantations or forests whose age is predetermined. Analyses with stem-analysis data from red pine (Pinusresinosa Ait.) plantations of southern Ontario indicate that the function estimates tree volumes more accurately than the standard methods commonly used.

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