Site Index of Red Pine in Relation to Soils and Topography in the Allegheny Plateau of Ohio

1990 ◽  
Vol 7 (3) ◽  
pp. 129-133
Author(s):  
James H. Brown ◽  
Charles A. Duncan
Keyword(s):  
Clay Content ◽  
Site Index ◽  
Height Growth ◽  
Red Pine ◽  
Tree Age ◽  
Soil Horizon ◽  
Slope Position ◽  
Regression Equations ◽  
Old Field ◽  
Allegheny Plateau

Abstract Multiple regression equations using topographic and soil factors were developed for predicting height growth and site index for red pine planted on old-field sites in the unglaciated Western and Central Allegheny Plateau Regions of Ohio. Regression equations containing slope position and aspect combined with tree age accounted for 58% of the variation in heights of trees. Height growth increased with A soil horizon thickness, and adding that variable to equations increased the variation explained to 61%; conversely, growth decreased as clay content of the B soil horizon increased and adding that factor further increased the variation accounted for to 66%. North. J. Appl. For. 7:129-133, September 1990.

scholarly journals Growth and Site Index of White Pine in Relation to Soils and Topography in the Glaciated Areas of Ohio

2007 ◽  
Vol 24 (2) ◽  
pp. 98-103 ◽  
Author(s):  
James H. Brown
Keyword(s):  
Clay Content ◽  
Site Index ◽  
Growth Increment ◽  
Height Growth ◽  
Soil Horizon ◽  
Slope Position ◽  
Regression Equations ◽  
Old Field ◽  
White Pine ◽  
Annual Increment

Abstract Multiple regression equations were developed using topographic and soil factors for predicting growth and site index of white pine growing on old-field sites in the Wisconsin-aged glaciated areas of northern and western Ohio. Correlations between height growth of trees below the breast high (bh) annual growth increment and bh and above were not statistically significant and growth and site index estimates were made using age at bh and growth from the bh annual increment to the growing tip. The best estimates of heights and site index were obtained when data were subdivided into two groups. For plots having 0–10% slopes, two regression equations were developed for predicting height growth: one containing slope shape and depth to soil mottling and the other adding percent clay in the B2 soil horizon to the equation. Those equations accounted for 67 and 73%, respectively, of the variation in heights of trees and 35-year site index ranged from 62 to 82 ft, with the best growth on convex-shaped slopes having the greatest depth to mottling and the lowest clay content. For sites having slopes greater than 10%, one equation was developed containing slope position and slope percent as variables. That equation accounted for 72% of the variation in heights of trees, and site index ranged from 71 to 81 ft, with the best growth on plots at the bottom of slopes having the lowest slope percent.

Site Index of Yellow-Poplar in Relation to Soils and Topography in the Allegheny Plateau of Ohio

1988 ◽  
Vol 5 (1) ◽  
pp. 34-38
Author(s):  
James H. Brown ◽  
Robert D. Marquard
Keyword(s):  
Soil Depth ◽  
Site Index ◽  
Tree Age ◽  
Soil Horizon ◽  
Slope Position ◽  
Regression Equations ◽  
Eastern United States ◽  
Old Field ◽  
Yellow Poplar ◽  
Allegheny Plateau

Abstract Yellow-poplar is an important component of forest stands in much of the central and eastern United States, and areas and volumes of the species have increased significantly in recent years. Multiple regression equations using soil and topographic factors were developed for predicting height growth and site index for yellow-poplar growing on old-field sites in the unglaciated Allegheny Plateau of Ohio. Equations containing only aspect, slope position, and tree age accounted for approximately 75% of the variation in heights of trees, while adding total soil depth and/or pH of the A soil horizon increased the variation accounted for to 80 to 83%. Thirty-five year site indices (based on age at breast height (bh) and height from bh to growing tip) varied from 56 to 80 ft. North. J. Appl. For. 5:34-38, March 1988

Growth Intercept Methods for Predicting Site Index in Red Pine Plantations in the Allegheny Plateau of Ohio

1990 ◽  
Vol 7 (1) ◽  
pp. 27-30 ◽  
Author(s):  
James H. Brown ◽  
Charles A. Duncan
Keyword(s):  
Site Index ◽  
Height Growth ◽  
Red Pine ◽  
Site Quality ◽  
Soil Horizon ◽  
Old Field ◽  
Annual Increment ◽  
Breast Height ◽  
Allegheny Plateau ◽  
Growth Intercept

Abstract Growth intercept (GI) techniques were evaluated for estimating site quality in red pine stands planted on old-field sites in the unglaciated Western and Central Allegheny Plateau regions of Ohio. Correlations between height growth of trees below breast height (BH) and height growth above BH were not statistically significant. Site index estimates were made using age at BH and height from BH to the growing tip. Three-year and 5-year growth beginning three internodes above the BH annual increment and 10-year growth beginning one internode above BH were more significantly correlated with height than were intercepts beginning at BH. In equations developed for predicting site index, 3-, 5-, and 10-year intercepts in combination with age accounted for 64 to 80% of the variation in tree heights. Combining thickness of the A soil horizon with GI and age statistically increased the variation accounted for in the 3- and 5-year GI equations; however, for field use, the improvement in accuracy was not sufficient to justify making the additional soil measurement. North. J. Appl. For. 7(1):27-30, March 1990.

scholarly journals Growth Intercept Methods for Predicting Site Index in White Pine Plantations in the Glaciated Areas of Ohio

2006 ◽  
Vol 23 (3) ◽  
pp. 176-183 ◽  
Author(s):  
James H. Brown
Keyword(s):  
Site Index ◽  
Growth Increment ◽  
Annual Growth ◽  
Site Quality ◽  
Soil Horizon ◽  
Regression Equations ◽  
White Pine ◽  
Annual Increment ◽  
Growth Intercept ◽  
Annual Growth Increment

Abstract Growth intercept (GI) techniques were evaluated for estimating site quality in white pine stands planted on old-field sites in the Wisconsin-aged glaciated areas of northern and western Ohio. Correlations between growth of trees below the breast high (bh) annual growth increment andheight growth from bh and above were not statistically significant. Site index estimates were made using age at bh and height from the bh annual growth increment to the growing tip. Three-year and 5-year growth beginning 3 years above the bh annual increment and 10-year growth beginning oneinternode above bh were significantly more correlated with height than were intercepts beginning at bh. In multiple regression equations developed for predicting site index, 3-, 5- and 10-year intercepts, along with age at bh, accounted for 76, 77, and 80%, respectively, of the variationin tree heights and 35-year site indices varied from 60 to 83 ft. Combining clay content of the B2 soil horizon with GI and age increased the variation accounted for by 3-, 5-, and 10-year GI equations to 79, 78, and 81%, respectively, and the improvement in site index estimatesover those using GIs alone was not more than ±2 ft within any given GI measurement.

Oak Stump Sprouting on Dry Sites in Northern Lower Michigan

1987 ◽  
Vol 4 (3) ◽  
pp. 142-145 ◽  
Author(s):  
Ann M. Lynch ◽  
John R. Bassett
Keyword(s):  
Site Index ◽  
Tree Age ◽  
Slope Position ◽  
White Oak ◽  
Parent Tree ◽  
Consistent Trend ◽  
Oak Trees ◽  
Stump Sprouting ◽  
Tree Stump ◽  
Stump Diameter

Abstract In clearcut portions of 37 stands, stumps from northern red, northern pin, and white oak trees, averaging about 65 years old when felled, were measured to relate sprouting to stump diameter, estimated dbh, slope position, aspect, site index, and parent tree (stump) age. At least one vigorous sprout was produced by 80 and 77% of northern red and northern pin oak stumps, respectively, and sprouting was independent of stump diameter. In contrast, 54% of white oak stumps produced at least one vigorous sprout, and sprouting was related to stump diameter. Northern red and northern pin oaks sprouted least frequently on lower slopes, whereas white oaks sprouted least frequently on midslope positions. White oak sprouting was also less frequent on south-and west-facing slopes. Sprouting of white and northern pin oaks was weakly associated with site index. The sprouting of all species was related to tree age, but only white oak showed a consistent trend of decreased sprouting with increased tree age. An average of 134 oak stumps per acre produced at least one vigorous sprout. North. J. Appl. For. 4:142-145, Sept. 1987.

Early Height Growth and Site Index for Planted Red Pine in North Central Ontario

1995 ◽  
Vol 12 (1) ◽  
pp. 23-29
Author(s):  
William H. Carmean ◽  
James S. Thrower
Keyword(s):  
Growth Curves ◽  
Analysis Data ◽  
Site Index ◽  
Height Growth ◽  
Red Pine ◽  
North Central ◽  
Breast Height ◽  
Excellent Growth ◽  
Index Estimation ◽  
Best Estimates

Abstract Height-growth, site-index curves, and growth intercepts were developed from internode and stem-analysis data using dominant trees in 25 plots located in red pine plantations aged 26 to 37 yr. Height-growth curves were based on breast-height age because growth below breast height (1.3 m) was slow and erratic. Growth intercepts using the first three to five internodes above 1.5 m gave the best estimates of site index (dominant height at 20 yr breast-height age)for trees that were between 3 and 5 yr breast-height age; site-index estimation equations gave the best estimates for trees older than 10 yr breast-height age. These computed height-growth curves and growth intercepts and observed site index in north central Ontario were similar to other regions. The excellent growth observed in this study suggests that red pine should be given greater emphasis in future reforestation programs in north central Ontario. North. J. Appl. For. 12(1): 23-29.

Site Index Curves for Unthinned Norway Spruce Plantations in New York

1988 ◽  
Vol 5 (4) ◽  
pp. 251-254
Author(s):  
Eric J. Jokela ◽  
Steven B. Jack ◽  
Christopher A. Nowak
Keyword(s):  
New York ◽  
Norway Spruce ◽  
Analysis Data ◽  
Site Index ◽  
Old Field ◽  
Breast Height ◽  
Soil Catena ◽  
Central New York ◽  
Field Estimation ◽  
Allegheny Plateau

Abstract Polymorphic site index curves were developed for Norway spruce growing in unthinned, old-field plantations in the Allegheny Plateau region of central New York (reference age is 50 years at breast height). Stem analysis data were collected from 151 dominant and codominant trees representing a single but wide-spread soil catena (Bath - Lordstown - Mardin - Volusia; approx. 2.7 million ac). Site index curves at 10-ft intervals for breast height ages 10 to 50 years are furnished for field estimation. For more precise estimates, a table of site index values by 2-ft heights and 2-year ages is provided. North. J. Appl. For. 5:251-254, December 1988.

Predicting Site Index for Old-Field Loblolly Pine Plantations

1981 ◽  
Vol 5 (3) ◽  
pp. 109-114 ◽  
Author(s):  
Michael S. Golden ◽  
Ralph Meldahl ◽  
Steven A. Knowe ◽  
William D. Boyer
Keyword(s):  
North Carolina ◽  
Loblolly Pine ◽  
Regression Models ◽  
Site Index ◽  
Height Growth ◽  
Growth Patterns ◽  
Clay Soils ◽  
Silty Clay ◽  
Old Field ◽  
Separate Table

Abstract Height-over-age curves and site-index prediction tables were derived using nonlinear polymorphic regression models with data from 25-year-old old-field plantations ranging from coastal North Carolina to southwestern Arkansas. Plots from heavy silty clay soils of the interior flatwoods of Mississippi exhibited height growth patterns noticeably different from the overall pattern. A separate table and set of curves were developed for such sites.

scholarly journals RELATIVE QUALITY OF THE MAJOR FOREST ASSOCIATIONS OF THE SOUTHERN B.C. INTERIOR FOR GROWTH OF LODGEPOLE PINE, ENGELMANN SPRUCE, DOUGLAS-FIR AND ALPINE FIR

1966 ◽  
Vol 42 (3) ◽  
pp. 306-313 ◽  
Author(s):  
Walter Stanek
Keyword(s):  
British Columbia ◽  
Lodgepole Pine ◽  
Site Index ◽  
Height Growth ◽  
Douglas Fir ◽  
Regression Equations ◽  
Common Occurrence ◽  
Engelmann Spruce ◽  
Relative Quality

Height growth of lodgepole pine, Engelmann spruce, Douglas-fir and alpine fir was investigated in the Douglas-fir and Engelmann Spruce-Alpine Fir Zones of the Interior of British Columbia. In the same forest association each species has a characteristic site index at the age of 100 years (SI/100). Regression equations were calculated for predicting SI/100 of several species in different associations. Regression equations were also developed for estimating SI/100 of Engelmann spruce, Douglas-fir and alpine fir from known SI/100 of lodgepole pine. The latter species was selected because of its common occurrence in the two zones. In addition regression equation was calculated for predicting SI/100 of lodgepole pine from known SI/100 of Engelmann spruce. All regression equations apply to naturally established stands in the study area.

Croissance en hauteur de l'épinette noire: région de Lebel-sur-Quévillon et de Dolbeau au Québec

1992 ◽  
Vol 22 (9) ◽  
pp. 1378-1386 ◽  
Author(s):  
Richard Zarnovican
Keyword(s):  
Black Spruce ◽  
Growth Function ◽  
Site Index ◽  
Height Growth ◽  
Tree Age ◽  
Average Height ◽  
Height Increment ◽  
Stem Analysis ◽  
Site Class ◽  
Temporal Structures

Height growth of black spruce was studied from stem analysis in 72 circular plots of 0.1 ha located in the Lebel-sur-Quévillon and Dolbeau regions, province of Quebec. Tree age analysis showed that only 52 of these plots were evenly aged; therefore, only these were retained in the present study. Mean age determined at diameter at breast height was as variable as mean total age. The comparison of Plonski's and Vézina and Linteau's parameterized site-index curves suggested that Plonski's model is more suitable for asymptotic growth of black spruce. The comparison of parameterized average height curves from 52 plots with Plonski's curves indicated that black spruce height growth in these regions is not uniform; four different growing forms corresponding to temporal structures can be distinguished. These growing forms can have asymptotic or linear curves; these can coincide with or cut across the Plonski's site-class curves, according to the increase or decrease in height growth with age. Finally, the growing forms are also found by parameters of Korf's growth function, by height increments, and by ages at which height increment is highest.

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