scholarly journals Compatible Taper and Stem Volume Equations for Five Pine Species in Mixed-Species Forests in Mexico

2019 ◽  
Vol 65 (5) ◽  
pp. 602-613
Author(s):  
Gerónimo Quiñonez-Barraza ◽  
Dehai Zhao ◽  
Héctor Manuel De los Santos-Posadas
Keyword(s):  
Volume Ratio ◽  
Stem Volume ◽  
Volume Data ◽  
Stem Height ◽  
White Pine ◽  
Mixed Species ◽  
Cumulative Volume ◽  
Volume Equations ◽  
Better Than ◽  
Pine Species

Abstract Ten systems of compatible taper and outside-bark volume equations derived from upper-height-based volume ratio equations were compared with a used segmented-stem system of compatible taper and volume equations. All the systems were simultaneously fitted to cumulative volume data and taper data for Arizona pine, Aztec pine, Durango pine, Mexican white pine, and Smooth-leaved pine species in naturally regenerated mixed-species forests in Mexico. The systems derived from volume ratio equations performed better than the segmented-stem system for most species. The resultant top systems might be easier to implement than the segmented-stem system for predicting upper-stem height, upper-stem diameter, merchantable volume, and total stem volume for considered species.

scholarly journals Compatible Taper and Volume Systems Based on Volume Ratio Models for Four Pine Species in Oaxaca Mexico

Forests ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 145
Author(s):  
Albert Castillo-López ◽  
Gerónimo Quiñonez-Barraza ◽  
Ulises Diéguez-Aranda ◽  
José Javier Corral-Rivas
Keyword(s):  
Sustainable Forest Management ◽  
Essential Element ◽  
Volume Ratio ◽  
Stem Volume ◽  
Mixed Species ◽  
Commercial Species ◽  
Pinus Pseudostrobus ◽  
Total Tree ◽  
Volume Equations ◽  
Pine Species

Estimating tree volume components is an essential element in sustainable forest management. Compatible taper and merchantable outside-bark volume systems based on volume ratio models were globally fitted to four pine species (reduced models) with the aim to select the best reduced model and to fit it with dummy variables and additive effects using Pinus pseudostrobus Lindl as a base species. The study was carried out in the northern mountains of Oaxaca, Mexico. To fit the taper, merchantable volume, stem volume, branch volume, and total tree volume (stem volume and branch volume) equations, a taper dataset of 222, 230, 245, and 333 trees of Pinus douglasiana Martínez (Pd), Pinus oaxacana Mirov (Po), Pinus patula Schltd (Pp), and Pinus pseudostrobus Lindl (Pps), respectively, was used. In general, the compatible systems explained more than 97% in the observed variability for the four studied components: outside-bark diameter (d), merchantable outside-bark volume (Vm), stem outside-bark volume (Vs), and total tree volume (Vt). Alternatively, more than 52% of the observed variability for branch volume (Vb) was also explained. The developed compatible systems based on volume ratio models are a simple and consistent alternative for estimating the outside-bark diameter and variable outside-bark volume, as well as the components of commercial species for uneven-age and mixed-species forests in Oaxaca, Mexico.

scholarly journals Deriving compatible taper functions from volume ratio equations based on upper-stem height

2017 ◽  
Vol 47 (10) ◽  
pp. 1424-1431 ◽  
Author(s):  
Thomas B. Lynch ◽  
Dehai Zhao ◽  
Will Harges ◽  
John Paul McTague
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Volume Ratio ◽  
Stem Volume ◽  
Stem Height ◽  
Ratio Data ◽  
Prediction Systems ◽  
Pinus Taeda L ◽  
Taper Equations ◽  
Tree Stem

A very common model for prediction of tree stem volumes to upper-stem height or diameter limits is the use of a merchantable to total volume ratio function multiplied by a total stem volume function. Many users of these prediction systems also desire taper equations that can predict heights to upper-stem diameters. While taper equations compatible with volume ratio equations have been used for many years, compatible taper equations from volume ratio equations that are functions of upper-stem height have been used infrequently. Yet many studies have indicated that height-based ratio equations perform well and frequently have statistics of fit that are comparable with diameter-based volume ratio equations. Compatible taper equations derived from height-based ratio equations are presented here. The methodology that uses height-based merchantable to total volume ratios does not require the solution of a differential equation after differentiating the height-based volume ratio, as is necessary when using the method of deriving taper equations from diameter-based merchantable to total volume ratios. This could be an advantage depending on the complexity of the ratio function. Example taper equations fitted to loblolly pine (Pinus taeda L.) data from the southeastern USA and the state of Oklahoma, USA, indicate good fit to these data, whether fitted directly to taper data or implicitly by using parameters fitted to volume ratio data.

scholarly journals Compatible System for Predicting Total and Merchantable Stem Volume over and under Bark, Branch Volume and Whole-Tree Volume of Pine Species

Forests ◽  
2017 ◽  
Vol 8 (11) ◽  
pp. 417 ◽  
Author(s):  
José Corral-Rivas ◽  
Daniel Vega-Nieva ◽  
Roque Rodríguez-Soalleiro ◽  
Carlos López-Sánchez ◽  
Christian Wehenkel ◽  
...  
Keyword(s):  
Stem Volume ◽  
Compatible System ◽  
Whole Tree ◽  
Pine Species

Compatible taper and stem volume equations for Larix kaempferi (Japanese larch) species of South Korea

2017 ◽  
Vol 14 (7) ◽  
pp. 1341-1349 ◽  
Author(s):  
Nova D. Doyog ◽  
Young Jin Lee ◽  
Sun Joo Lee ◽  
Jin Taek Kang ◽  
Sung Yong Kim
Keyword(s):  
South Korea ◽  
Japanese Larch ◽  
Stem Volume ◽  
Larix Kaempferi ◽  
Larch Species ◽  
Volume Equations

scholarly journals Comparative Transcriptomics Among Four White Pine Species

2018 ◽  
Vol 8 (5) ◽  
pp. 1461-1474 ◽  
Author(s):  
Ethan A. G. Baker ◽  
Jill L. Wegrzyn ◽  
Uzay U. Sezen ◽  
Taylor Falk ◽  
Patricia E. Maloney ◽  
...  
Keyword(s):  
Comparative Transcriptomics ◽  
White Pine ◽  
Pine Species

Cubic-Foot Volume of Loblolly Pine to Any Merchantable Top Limit

1977 ◽  
Vol 1 (2) ◽  
pp. 7-9 ◽  
Author(s):  
Harold E. Burkhart
Keyword(s):  
Loblolly Pine ◽  
Stem Volume ◽  
Simple Equations ◽  
Volume Estimates ◽  
Volume Equations

Abstract Foresters commonly wish to predict tree volume for various top diameters. However, tree volume equations are generally restricted to specific top limits. Further, volume equations for various top limits often cross illogically. This study was conducted with the objective of developing logically related cubic-foot volume estimates for any desired top diameter limit. The approach taken was to predict total stem volume and to convert total volume to merchantable volumes by applying predicted ratios. Results reported here enable users to employ relatively simple equations to obtain cubic-foot volume to any top diameter limit. Volume between any two specified diameters on the stem can be obtained by subtraction.

scholarly journals Compounding effects of white pine blister rust, mountain pine beetle, and fire threaten four white pine species

Ecosphere ◽  
2020 ◽  
Vol 11 (10) ◽  
Author(s):  
Joan C. Dudney ◽  
Jonathan C. B. Nesmith ◽  
Matthew C. Cahill ◽  
Jennifer E. Cribbs ◽  
Dan M. Duriscoe ◽  
...  
Keyword(s):  
Mountain Pine Beetle ◽  
White Pine Blister Rust ◽  
White Pine ◽  
Blister Rust ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Pine Species

scholarly journals Taper, Volume, and Weight Equations for Red Pine in West Virginia

2008 ◽  
Vol 25 (3) ◽  
pp. 151-153 ◽  
Author(s):  
Lichun Jiang ◽  
John R. Brooks
Keyword(s):  
West Virginia ◽  
Ease Of Use ◽  
Red Pine ◽  
Seemingly Unrelated Regression ◽  
Stem Volume ◽  
West Virginia University ◽  
Individual Tree ◽  
Unrelated Regression ◽  
Taper Equation ◽  
Volume Equations

Abstract Compatible taper, volume, and weight equations were developed for planted red pine in West Virginia. The data were based on stem analysis of 26 trees from West Virginia University Research Forest, located in northern West Virginia. A commonly used segmented polynomial taper equation was chosen because of its balance between prediction accuracy and ease of use. Seemingly unrelated regression was used to simultaneously fit the system of equations for inside and outside bark data. When compared with existing total stem volume equations developed by Fowler (Fowler, G.W., 1997, Individual tree volume equations for red pine in Michigan, North. J. Appl. For. 14:53–58) and by Gilmore et al. (Gilmore, D.W., et al., 2005, Thinning red pine plantations and the Langsaeter hypothesis: A northern Minnesota case study. North, J. Appl. For. 22:19–25), a positive bias was evident that increased directly with stem diameter for trees from this region.

RAPID GERMINATION OF WHITE PINE SEED

1959 ◽  
Vol 35 (3) ◽  
pp. 203-211 ◽  
Author(s):  
D. P. Fowler
Keyword(s):  
Seed Germination ◽  
Seed Coat ◽  
White Pine ◽  
Fresh Seed ◽  
Work Done ◽  
Better Than

This paper reports the results of some work done to develop a rapid germination technique suitable for small quantities of valuable white pine seed.It was found that by removing the seed coat from fresh seed, germination was more rapid and yielded a higher per cent germination than seed stratified for 20 days at 40 °F. Three types of soaking (aerated water, changed water, and unchanged water) and three durations of soaking (3, 7 and 10 days) were tested. Soaking seed in aerated water for three, seven or ten days was almost as good as 20 days stratification. Aerated water was superior for soaking treatments than water which had been changed twice daily, which in turn was better than water which was not changed. Seed germination decreased as the length of soaking period increased except for seeds which had been soaked in aerated water.Attempts to germinate seed directly from cones which had not been allowed to dry were not successful. Apparently embryos in these seeds were not fully developed.The implications of the results are discussed briefly.

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