Case study : growth and development of forest stands in the northern Rocky Mountains

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| {CASE STUDY: GROWTH AND DEVELOPMENT
7?OF FOREST STANDS IN THE

NORTHERN ROCKY MOUNTAINS

Russell T. Graham and Jonalea R. Tonn

USDA Forest Service Research Paper INT-255

INTERMOUNTAIN FOREST AND RANGE EXPERIMENT STATION
Forest Service, U.S. Department of Agriculture

THE AUTHORS

RUSSELL T. GRAHAM is a research forester working in the
silviculture of the cedar, hemlock, grand fir habitats
project at the Forestry Sciences Laboratory, Moscow,
Idaho. He began his career with the Forest Service in
1973 as a forester on the Bitterroot National Forest and
joined the Intermountain Station in 1975. He received
his B.S. in forestry from the University of Montana and
his M.S. in forestry from the University of Idaho.

JONALEA R. TONN is a forester working in the silviculture of
the cedar, hemlock, grand fir habitats project at the
Forestry Sciences Laboratory, Moscow, Idaho. She began
working for the Intermountain Station in 1974. She
received a B.S. and an M.F. both in forestry from the
University of Idaho.

ACKNOWLEDGMENT

The authors acknowledge Region 1, Division of Timber
Management, which had original responsibility for the study.
Staff there prepared the study plan, set up the mechanics of
the system, and arranged for cooperation with the Intermountain
Forest and Range Experiment Station.

USDA Forest Service
Research Paper INT-255
August 1980

CASE STUDY: GROWTH AND DEVELOPMENT OF FOREST STANDS

IN THE NORTHERN ROCKY MOUNTAINS

Russell T. Graham and Jonalea R. Tonn

INTERMOUNTAIN FOREST AND RANGE EXPERIMENT STATION
Forest Service
U.S. Department of Agriculture
Ogden, UT 84401

RESEARCH SUMMARY

Tree diameter and height growth were compared for nine habitat
types. Ten-year diameter growth was highly variable among habitat
types as was 10-year height growth. High variation in both diameter
and height growth also occurred within habitat types. Thirty-six
local yield tables are presented, one for each stand in the study.

CONTENTS

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INTRODUCTION

Information on growth and yield of managed stands plays a major role in both
stand prescription preparation and timber management planning. Stand characteristics
at various stages of development are used to plan intermediate cuttings as well as
the timing of the final harvest. But for many Northern Rockies habitat types (Daubenmire
and Daubenmire 1968) used in forest planning, there are insufficient data on forest

growth and yield.

To strengthen this data base, permanent sample plots were established in 36
stands on 11 forests during 1970 and 1971 with the intention of measuring the results
of management practices; therefore, thinned stands and stands scheduled for thinning
were chosen. These study stands, located throughout western Montana, northern
Idaho, and eastern Washington (see fig. 1), were not selected with any randomness or
experimental design in mind. In 1975 and 1976 the plots were remeasured, resulting
in 5 years of growth information.

The study encompasses a wide geographical area consisting of many climatic
conditions. The stand elevations range from 3,000 ft (914 m) to 7,000 ft (2 134 m).
The slopes and aspects of the stands are also quite variable (table 1).

Because of the diverse growing sites represented, the vegetation varies within
the study areas. The tree species represented include:

Abies grandis (Dougl.) Lindl. grand fir
Pseudotsuga menziesii var. glauca (Beissn.) Franco Douglas-fir
Pinus ponderosa Laws. var. ponderosa ponderosa pine
Pinus contorta Dougl. lodgepole pine
Tsuga heterophylla (Raf.) Sarg. western hemlock
Thuja plicata Donn western redcedar
Larix occidentalis Nutt. western larch

The habitat types represented include:

Tsuga heterophylla/Pachistima myrsinites Tshe/Pamy
western hemlock/pachistima myrsinites

Pinus ponderosa/Symphoricarpos albus Pipo/Syal
ponderosa pine/snowberry

Pseudotsuga menziesii/Calamagrostis rubescens-
arctostaphylos uva-ursi Psme/Caru-aruv
Douglas-fir/pinegrass-kinnikinnick

Abies grandis/Pachistima myrsinites Abgr/Pamy
grand fir/pachistima myrsinites

Pseudotsuga menziesii/Symphoricarpos albus Psme/Syal
Douglas-fir/snowberry

Abies lasiocarpa/Pachistima myrsinites Abla/Pamy
sub-alpine fir/pachistima myrsinities

Abies lasiocarpa/Vaccinium scoparium Abla/Vasc
sub-alpine fir/grouse whortleberry

Pseudotsuga menziesii/Physocarpus malvaceus Psme/Phma
Douglas-fir ninebark

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western redcedar/pachistima myrsinities

Since there were no criteria for stand selection other than past management or
planned future management, many different types of stands were selected. Both stand
size and number of sample points per stand were not fixed for the study. Stand age
was quite variable, ranging from 10 years to 200 years (table 1).

As would be expected, stand characteristics differ for each stand. Mean stand
diameters range from 0.9 to 16.3 inches (2.29 to 41.4 cm) (table 2). Both trees per
acre and accretion! vary from stand to stand. Because of ingrowth and/or mortality,
mean diameters in some of the stands are smaller for the second measurement.

Because of the nature of the data and the lack of an appropriate experimental
design, we are presenting the results as a case study. The results are for the
stands examined and the data should be extrapolated to other stands and conditions
with caution.

ANALYSIS

The analysis involved summarizing data for the 36 stands and making appropriate
comparisons. When each stand was chosen for inclusion in the study, the crop trees
were tagged and permanently marked. To make valid comparisons between the first and
second measurement, only crop trees were used in the thinned stands. In the unthinned
stands, the entire stand as it existed was used. Diameter growth and height growth
were converted to 10-year periods for ease of comparison. Incomplete records--that
is, trees dying during the study--were dropped from the diameter and height growth
calculations. A least squares mean separation procedure (SAS Institute 1979) was
used to separate the growth means for the habitat types.

To better show the impact of the diameter and height growth changes, each stand
was projected into the future using a stand prognosis model (Stage 1973). These
projections are the best estimate possible for the potential growth of the stands.

RESULTS

Diameter Growth

Tree size and age are very important in determining tree growth rates. Therefore,
to make comparisons among habitat types, the diameter growth means were adjusted for
both age and diameter of the trees at the time of the first measurement. In the
analysis of covariance, age and initial diameter were both significant (P < .05) in
explaining diameter growth. These adjusted growth means can be compared allowing for
different tree ages and diameters.

The Pipo/Syal h.t. had the smallest adjusted 10-year diameter growth mean, 0.68
inches (1.73 cm). The Abla/Pamy h.t. had the largest 10-year diameter growth mean,
4.26 inches (10.82 cm) (table 3). The adjusted means can be separated into distinct
habitat type groups based on 10-year diameter growth using the least squares mean
separation procedure. These were: (1) Pipo/Syal; (2) Abgr/Pamy, Thpl/Pamy; (3)
Psme/Phma, Tshe/Pamy, Psme/Syal, Abla/Vasc, Psme/Caru-Aruv; and (4) the Abla/Pamy
hye:

1Periodic annual cu ft volume growth based on 5-year period excluding ingrowtn.

Table 2.--Stand characteristics for each measurement period

ZEA,
50).

xd. beh. x height Basal area/acre Trees/acre Accretion!
Stand First Second First Second “Pirst Second First Second First Second

Inches Feet Ft? Ft3

Thinned stands (crop trees)
0505706 0.9 2.4 6.0 asa 1 8 300 25S 3 19
1106102 8.1 9.9 48.5 56.4 56 54 SZ 101 192 142
1106111 6.9 dd AG. S 51.4 78 84 304 260 135 72
1106202 8.6 9.4 62.5 64.0 103 106 255 219 WT, 229
1605803 8.0 HOGS: Sale / 585) 34 36 97 62 124 181
2503502 22S 8.8 59.5 Sen 39 46 48 109 33 40
2510102 8.6 10.1 5d.3 Sono 73 735 183 3a 82 E21
2510302 ans) 6. 7 52.6 40.6 24 25 130 101 29 30
2513211 TORO 10.4 S15 85.3 147 147 267 249 117 104
2513406 6.8 7.6 47.6 522 83 61 246 192 iia 87
2513701 4.7 56 40.0 40.3 46 48 381 286 143 145
2513905 SS) VSS 98.5 oSa5 93 91 65 9] 78 67
2514122 San 8.5 A256 S857 41 45 105 113 135 80
2514506 Sell Tes 24S Sl all 18 16 124 55 24 60
2514604 2.0 SZ T5e9 20.9 6 ital 260 200 ll 18
2514701 6, 1 7.6 24.8 S25 40 50 196 159 159 130
2515204 2 5.2 TBS) 15:6 9 22 380 380 30 55
2515304 18 239 10.8 14.8 6 16 340 340 EM 46
2515502 1.6 2.8 8.8 alc al 4 ie 300 300 13 Si
3002101 A’ il 4.8 22.0 ZA S Sy 46 395 370 79 141
3002204 0.6 1.9 5.0 9.5 1 5 280 280 3 1G
3010302 Ae 5.6 5855 39.4 31 34 256 199 97 49
3010303 On7 645 QoS, 42.0 52 65 129 286 oy 138
3010513 10.S V2 eel 59.9 60.1 60 60 99 75 85 199
3011501 Sa 7 Sierd 17.16 20.1 9) 47 433 315 72 55
3011807 2a S60 12.4 17.4 7 29 25.7 407 28 66
3014308 S25 On 5129 40.0 39 45 25] 208 58 166
4607224 O35 6.6 BS 1 Sie 34 42 159 178 67 88
4607301 7.6 Sind 56.4 63.3 38 46 119 122 47 77
4607311 8.8 OES 48.1 55-5 32 33 75 55 74 79
4607401 8.1 8.8 Sass 61.6 32 28 89 67 Sal 48
4607502 7.8 8.6 O7.2 69.4 55 57 164 141 91 118
4607602 Wd 3.4 IAS 201.1 3 ll 217 AS ial 22
Unthinned stands

2503201 1.3 9.2 AT 2 39.0 5S 88 76 191 62 38
2516227 ANS 4.4 2554 22:2 98 106 977 979 118 TAS
3016204 6.2 7.8 34.0 47-35 108 98 508 295 93 95

lBased on 5 years preceding measurement.

Table 3,-- 10-year diameter growth (inches) by habitat type and stand

Habitat type Stand
Habitat type Forest Stand Unadjusted Adjusted! Unadjusted Adjusted!
Pipo/Syal Bitterroot 6 0.907 0.68 a 0).57 0.49
Abgr/Pamy Flathead 8 1.45 1 62b 2.24 D254
Flathead 9 1.08 Ay
Kaniksu 10 ie Pe eli8
Kaniksu ale Let 2 e535
Kaniksu 1.5 ees 15-20
Kootenal 14 1.92 1.365
Flathead 25 1276 1.81
Thp1/Pamy Colville $5 deepal 1.47 ab py eZ TSO
Colville 52 165 159
Psme/Phma Lolo 30 2.41 2:97 ¢d 2.409 2.44
Colville 33 5202 2.81
Tshe/Pamy Clearwater i) 2.69 PRA Sas 6.14 6207
Coeur d'Alene 2 2.61 2.658
Coeur d'Alene 3 1.66 L276
Coeur d'Alene 4 1.88 1.82
Clearwater 5 7225 705
Kaniksu 12 asi De
Kootenai 16 220 DSOZ
Colville 31 205 2 lS
Colville 34 17S 1.62
Colville 36 5.25 507
Psme/Syal Kootenai 15 2202 2549 CG 4.00 Ie Oi)
Beaverhead 22 2250 240
Abla/Vasc Lewis §& Clark 18 3.45 2e54 ¢€ Al 2 ey
Lewis & Clark 19 2.20 2.18
Lewis & Clark 20 2000 PREYS)
Gallatin 27 SS 5:62
Gallatin 28 555 S25
Psme/Caru-aruv Bitterroot 7 3.71 2.99 d 1.28 163
Kootenai 17 2.67 2.42
Lolo 24 eT 1.29
Beaverhead 25 6.66 6.60
Abla/Pamy Flathead 24 3.77 4.26 6 3.44 5.95
Flathead 26 4.13 4.15
Kootenai 29 4.19 4.37

1Adjusted for initial diameter and age. Different letters indicate significant
diviterences.. (Pa< 305)

The adjusted diameter growth means for the individual stands within habitat
types had a large amount of variation (table 3). The stand diameter growth means
im the fshe/Pamny hi,t., canged. “from: 1.62 to 7.05 inches (4.11 to 17-91 cm). In the
Psme/Caru-Aruv h.t., adjusted diameter growth means ranged from 1.29 to 6.60 inches
(3.28 to 16.76 cm). The stand diameter growth means in the other habitat types
showed similar variation.

Height Growth

As with diameter growth, height growth is also dependent upon tree size and age.
The 10-year height growth means were adjusted using covariance analysis for initial
height and age. The growth means by habitat type were then compared using SAS least
squares mean separation procedure.

The Pipo/Syal h.t. had the smallest 10-year height growth mean, 4.02 ft (1.23
m). The Thpl/Pamy h.t. had the largest height growth mean, 10 ft (3.05 m) (table 4).
Three habitat type groups were distinguished by height growth: (1) Pipo/Syal; (2)
Abla/Pamy, Psme/Syal, Psme/Phma, Abgr/Pamy, Tshe/Pamy, Abla/Vasc; (3) Psme/Caru-Aruv,
Thpl/Pamy.

Within each habitat type there is a wide range of height growth means. In the
Tshe/Pamy habitat type, 10-year adjusted height growth ranged from 2.34 ft (0.71 m)
to a maximum of 14.18 ft (4.32 m). Likewise in the Abgr/Pamy habitat type, adjusted
height. growth means. ranged from 1.43 ft to 11.19 ft (0.44 to 3.41 m).

Stand Yields

Individual tree height and diameter growth characteristics are of less consequence
to forest managers than stand growth characteristics. Therefore, we projected each
stand into the future using a prognosis model (Stage 1973). This procedure produced
36 local yield tables, one for each of the stands in the study (appendix tables 5-40).

In reviewing the stand projections we feel most of them are realistic. These
projections may be used to estimate future volumes of stands of similar nature.
Enough information is provided so the forest manager may compare his stand conditions
and descriptions to those we have summarized.

DISCUSSION

A study of this type produces a large amount of information that can be used in
many ways. Silviculturists can predict future yields of stands they feel are
comparable. Timber management planners and researchers can use these data to refine
yield predictions,

This study encompasses a large geographic area with many different sites. Even
within habitat types many different sites exist that are reflected in the mean
diameter and height growths. In relation to habitat types, we have shown a wide
range of growth on the same habitat type. Some areas and habitat types we expected
to have poor growth proved capable of excellent diameter and height growth, especially
on the central Montana forests.

Table 4,-- 10-year height growth (feet) by habitat type and stand

Habitat type Stand
Habitat type Forest Stand Unadjusted Adjusted! Unadjusted Adjusted!
Pipo/Syal Bitterroot 6 3.40 4.02 a 3.4 33555
Abla/Pamy Flathead 24 5.00 6.67 ab ayes) 2.64
Flathead 26 Soak 5.62
Kootenai 29 Sal T0o9
Psme/Phma Lolo 30 6.10 TZ Save 2.6 3455
Colville 55 1225 12.45
Psme/Syal Kootenai 15 6.60 6.77 ab Le ar L252
Beaverhead 22 520 3.40
Abla/Vasc Lewis & Clark 18 7.00 8.65 bec BRS 6.19
Lewis §& Clark 19 soars 5.295
Lewis & Clark 20 8.6 6.26
Gallatin Zi 1635 14.69
Gallatin 28 ele? 9.09
Abgr/Pamy Flathead 8 70 7.48 abc LO? 10.90
Flathead 9 6.1 5.36
Kaniksu 10 7.4 9.10
Kaniksu Li 7.8 Teil
Kaniksu 13 57 8.43
Kootenai 14 delee9: 11.19
Flathead 25 he 8 TAS
Tshe/Pamy Clearwater 1 8.80 8.03 be 10.6 8.24
Coeur d'Alene 2 10.8 10.86
Coeur d'Alene 3 10.8 LOE 53
Coeur d'Alene 4 16 8.30
Clearwater 5 9.0 9.05
Kaniksu 12 530) 2004
Kootenal 16 128 5.98
Colville 31 14.0 12.99
Colville 34 ES 29 14.18
Colville 36 13.6 ii Etsy |
Psme/Caru-aurv Bitterroot 7 10.00 8.97 c 6.2 612
Kootenai Ly 132.0 L159
Lolo 21 8.8 oe
Beaverhead 23 10:0 7059
Thp1/Pamy Colville 32 11.10 10.00 ¢ 1525 1.58
Colville 35 8.2 9.18

‘adjusted for initial height and age. Different letters indicate significant
ditterencess.((P.6 05)

Many variables influence tree growth, making it difficult to compare the growth
of the stands and the habitat types. We have a limited sample of the numerous sites
available in the study area. Using a covariance analysis, with both tree size and
age as covariates, we allowed for many differences that exist among the stands.
These comparisons and yield tables provide a reference point for future management
activities on these habitat types.

PUBLICATIONS CITED

Daubenmire, R., and Jean B. Daubenmire.
1968. Forest vegetation of eastern Washington and northern Idaho. Wash. Agric.
Exp. Stns Tech. Bull. 60, 104 p, Pullman, Wash:
SAS Institute.
1979. SAS User's Guide 1979 edition. SAS Institute Inc. Post Office Box 10066,
Raleigh, North Carolina 27605.
Stage, A. R.
1973. Prognosis model for stand development. USDA For. Serv. Res. Pap. INT-127,
32 p. Intermt. For. and Range Exp. Stn., Ogden, Utah.

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APPENDIX

Note: For all yield tables in the appendix, merchantable
volume was measured to a 4-inch top.

11

Table 5.--Yield table for Stand 1, Clearwater National Forest,
Pierce Ranger District, Section 6 Thinning
ee ene ne eee
Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 batts. Accretion Mortality x d.b.h. x height
Ft? Ft3 Ft3 Inches Feet
21 233 8 30 59 0 0) 19 1 2th Soa
31 184 18 49 236 50 0) 33 ci) ASZ 24.5
41 158 30 65 535 432 170 47 6 5.9 34.9
5l 141 43 79 946 854 1,726 69 7 7. 45.4
61 129 61 96 1,564 1,444 5,086 83 9 iS 56:.'0
ql 121 79 112 25.509 2peliaa 8,756 106 12 10.9 66.0
81 15) 99 128 3,242 3,079 13,4872, 137 17 12.6 Tone
91 109 W235 145 4,437 4,192 19,240 NS, 24 14.4 84.8
101 103 143 159 Sil! 5,236 24,361 168 30 16.0 93.3
111 98 168 176 6,951 6,485 30,609 176 38 Isa LOL. 2
eA 93 191 190 835.555) 7,695 36,367 0 0 19.4 108.6

Table 6.--Yield table for Stand 2, Coeur d'Alene National Forest,
Wallace Ranger District, Berlin Gulch

Volume per acre

Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 bd, ft. Accretion Mortality x d.b.h. x height

Ft Ft3 Ft3 Inches Feet
51 101 54 81 1,538 1,293 4,427 142 9 9.9 56.4
61 94 88 1a 2,859 2,451 10,163 V7 7 13.0 69.9
7A 89 122 138 4,460 3,732 17,265 203 2m 1IS.9 82.2
81 84 155 160 6,219 5,234 24,864 230 39 18.4 9357
91 79 188 181 8,129 6,781 32,995 243 52 20.9 104.3
101 74 219 201 10,039 8,305 40,997 260 65 Da 114.1
ati 69 250 225 11,981 9,868 49,217 263 80 25.8 123.21
iA 65 280 247 135.8107 11,363 57,008 247 94 28.2 WS1e3
131 61 304 264 153,550 12,656 63,693 232 106 30.3 138.8
141 56 324 279 16,607 13,785 69,402 221 ilar, 32.4 145.7
151 53 341 290 17,642 14,773 74,281 0 0) 34.4 15220

Table 7.--Yield table for Stand 3, Coeur d'Alene National Forest,
Wallace Ranger District Cabin Creek

Volume per acre
Total Merchantable Scribner

Age _Trees/acre BA/acre___CCF ft3 ft3 bd.ft. Accretion Mortality x d.b.h. x height
Ft2 Ft3 Ft3 Inches Feet
50 260 84 130 2,020 1,670 3,507 az 15 Teall 51.4
60 239 25 162 3,591 3,094 10,830 210 21 9.8 63.5
70 224 167 189 5,484 4,787 19,565 229 Si 7. 74.6
80 2A 203 214 7,465 6,530 29,149 261 43 13.3 84.7
90 200 241 243 9,650 8,450 39,645 288 56 14.9 94.0
100 188 297 270 11,965 10,414 50,280 286 7a 16.4 102-5
110 178 308 292 14,112 12,209 59,954 288 86 17.8 110.3
120 167 334 Epil 16,138 ESe87:5 69,344 286 100 19ST eS
130 158 S57 S27 18,002 15,401 77,899 282 1S: 20.4 1241
140 148 377 339 19,694 16,781 85,590 272 125; 21-6 130.2
150 139 393 349 215163 17 ,974 92,360 0 0 D2, 135.9

13

Table 8.--Yield table for Stand 4, Coeur d'Alene National Forest,
Wallace Ranger District, Little Haystack

Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 bd.ft. Accretion Mortality x d.b.h. x height
Ft2 Ft? Ft3 Inches Feet
50 219 106 149 3,041 2,689 7,566 229 19 9.4 64.0
60 205 156 183 5,143 4,570 17,780 259 29 11.8 75.6
70 194 203 213 7,444 6,595 28,617 266 43 13.8 85.7
80 183 241 241 9,672 8,511 38,798 289 58 iS .05 94.7
90 172 278 267 11,979 10,454 48,948 311 76 732 102.9
100 162 314 292 14,333 12,550 58,972 308 97 18.9 110.4
110 1S 343 Sid 16,444 13.,985 67,465 300 117 20.4 eS
120 140 366 326 18,275 15,071 74,631 289 135 219 12328
130 130 384 335 19,816 16,493 80,179 291 148 23%3 129.9
140 120 400 345 2125: 175535 85,170 266 161 2457 13546
150 110 410 349 22,301 18,269 88,368 0 0) 26.1 AES A

Table 9.--Yield table for Stand 5, Clearwater National Forest,
Lochsa Ranger District, Big Hill

Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 bd.ft. Accretion Mortality x d.b.h. x height
Ft2 Ft? Ft3 Inches Feet
39 62 36 Sl 863 851 3,015 181 5 10.3 58:5
49 59 96 97 23623 25.012 10,191 244 13 E72 75.6
59 56 160 138 4,930 4,432 13,980 vay fal 26 22.9 88.0
69 53 219 166 75.372 6,168 14 07:7 316 42 pag Bass 98.1
79 50 280 192 10,110 7,859 125251 351 62 32.0 106.8
89 47 339 220 13,008 9,433 10,116 341 85 36.3 114.3
99 44 386 244 15,572 10,540 8,622 362 108 39.9 120.8
109 42 430 265 18,116 11,407 9,432 359 135 43.6 L267
119 39 466 282 20,356 11,941 14,450 349 161 46.9 132.0
129 36 492 293 22,251 12,158 24,537 319 188 50.0 136.8
139 33 506 298 25,547 12,042 39,216 0 0 S226 141.2

Table 10.--Yield table for Stand 6, Bitterroot National Forest,
Stevensville Ranger. District, Sweeny Creek

Volume per acre

Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 bd.ft. Accretion Mortality x d.b.h. x height
Ft? Fe Ft3 Inches Feet
85 191 88 95 1,964 1,486 4,790 38 ial 9.2 39.0
95 177 95 98 23-254 1,709 5,689 40 14 9.9 45.6
105 165 98 98 2,493 1,930 6,771 41 16 10.4 50.9
115 154 100 99 2,743 2,142 7,815 43 18 10.9 5559
125 143 102 99 3,000 25361 9,029 42 20 aba keene! 60.5
135 133 103 98 Seok: 2,547 10,220 42 21 11.9 64.7
145 124 105 98 3,419 2721 Ld 37 7 39 23 125 68.6
155 115 105 97 35579 2,860 12,362 38 24 12.9 T2022
165 107 105 96 35.725 2,987 T3275 37 24 1354 75.4
175 100 104 95 3,849 3,094 145130 33 25 L358 78.4
185 93 103 93 559352 3,168 14,779 0 0 La 2 81.2

14

Table 11.--Yield table for Stand 7, Bitterroot National Forest,
West Fork Ranger District, Water Tank Sale

Volume per acre

Total Merchantable Scribner

Age _Trees/acre BA/acre CCF ft3 ft3 bd. ft. Accretion Mortality x d.b.h. x height
Ft2 Ft3 Ft3 Inches Feet
205 109 46 52 1.437 1h, 1477 4,385 40 g, 8.8 37 al
215 100 53 59 1,765 1,424 6,018 51 8 9.9 46.4
225 94 65 68 2,198 1,764 8,026 50 9 1.3 5 Tia d
235 89 72 73 2,606 2,109 10,010 54 atl 120.2 64.2
245 85 79 Wi: 3,040 2,476 12,056 59 13 lksteaal 70.8
255 81 87 82 5;,,503 2,869 14,246 58 15 14.1 76.6
265 Td 93 85 3,939 3,238 16,367 59 16 14.9 81.9
275 74 99 89 4,368 3,605 18,741 63 18 LS, 86.6
285 TAA 106 92 4,820 3,994 21,261 61 20 16.6 90.9
295 68 LT: 95 5.252 4,351 23);,015 63 22 7S 94.9
305 65 116 97 5,642 4,700 25,804 0 0 18.1 98.5

Table 12.--Yield table for Stand 8, Flathead National Forest,
Swan Lake Ranger District, Bear Creek

Volume per acre
Total Merchantable Scribner

Age _Trees/acre BA/acre CCF ft3 ft3 bd.ft. Accretion Mortality x d.b.h. x height

Ft2 Ft3 Ft3 Inches Feet
65 131 aS 96 L772 1,628 5224 121 8 LOG 1 S845
75 124 106 118 2,896 2,696 10,086 130 13 2S 69.3
85 118 136 134 4,064 Se AZ 15,210 134 18 14.5 78.1
95 113 163 148 5,224 4,644 19,640 147 2 16.2 85.5
105 109 189 160 6,465 5,567 PTOU TAS) 163 29 17.9 92.0
115 104 218 M72, 7,809 6,490 27,686 162 36 19.5 97.8
125 100 242 182 9,074 7,296 30,906 166 43 2150 102.9
135 96 265 193 10,310 8,010 33,408 165 50 22.44 107.5
145 93 284 203 11,460 8,635 55:,.476 175 57 23 ah 11.8
155 89 304 213 12,646 9,218 37 51187 167 64 25a LESi6
165 85 320 220 13,676 9,648 38,136 0 0 264,2 119.1

Table 13.--Yield table for Stand 9, Flathead National Forest,
Glacier View Ranger District, Cedar Flats

Volume per acre

Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 bd. ft. Accretion Mortality x d.b.h. x height
Ft Ft3 Ft3 Inches Feet
48 101 25 39 532 381 306 30 5 6.7 40.6
58 91 32 46 781 609 1,358 35 6 8.0 47.9
68 84 38 SZ 10175 837 2,681 39 7 Oy! 54.9
78 78 45 58 15.393 1,058 4.055 45 8 OZ 655
88 74 52 64 1,756 293 yee KO) 52 ll TEES 67.8
98 69 59 69 2,160 1,542 6,193 52 16 1255 T3iad.
108 65 64 73 2,919 72 6,993 54 23 S25 79.4
118 59 68 76 2,836 i922 7,561 54 32 14.5 84.7
128 53 69 76 3,058 2,021 TE AIEITE 53 43 LS 4 89.7
138 47 68 74 3,159 2,034 7,615 48 56 165;3 94.4
148 40 64 70 3,082 1,932 6,998 0 0 lg 4 98.8

15

Table 14.--Yield table for Stand 10, Kaniksu National Forest,
Trout Creek Ranger District, Pine Ridge

Volume per acre

Total Merchantable Scribner

Age _Trees/acre_BA/acre CCF ft3 ft3 bd.ft. Accretion Mortality x d.b.h. x height
Ft2 Ft3 Ft3 Inches Feet
84 249 147 171 5,039 4,435 18,338 104 27 10.4 85.3
94 236 159 173 5,815 5,134 22,708 108 30 HEIRS OTe,
104 224 171 178 6,595 5,845 27 S122 100 34 L159 96.8
114 212 180 181 1259 6,454 30,937 110 38 127.5 101.9
124 202 190 185 75977 7,140 55),125 107 44 1351 106.7
134 192 198 188 8,609 75 103 38,946 103 50 13.8 ga Na lees
144 182 204 189 9,138 8,288 41,975 108 56 14.4 1B RY,
154 172 210 191 9,658 8,807 45 ,006 107 63 TS.0 119.0
164 162 215 191 10,097 9,258 47,505 94 67 15:36 1225.6
174 153 217 189 10,373 9,554 49,434 99 68 16.1 126.0
184 145 220 188 10,678 9,897 51,568 0 0 Oe 7 129.3

Table 15.--Yield table for Stand 11, Kaniksu National Forest,
Trout Creek Ranger District, Larch Creek

Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft bd.ft. Accretion Mortality x d.b.h. x height
Ft? Ft3 Ft? Inches Feet
55 192 61 110 17,555 1,083 1,995 87 10 eS) 5272
65 177 84 124 -2,124 1,835 5,593 98 12 9.3 63.1
75 166 106 137 2,987 2,649 10,163 101 14 10.8 72.6
85 158 126 147 3,855 3,463 15,074 111 18 12). 80.9
95 150 146 156 4,789 4,343 20); 311 120 22 1333 88.3
105 143 166 165 5,769 5,276 25;,.816 126 27 14.6 94.9
115 136 185 173 65:755 6,224 31,491 132 32 52:8 100.8
L25 130 203 181 Tet 3S 7,187 37,341 128 37 16.9 106.2
135 124 219 188 8,658 8,049 42,652 131 42 18.0 lied
145 118 233 195 9,543 8,889 47,979 130 47 19.0 1Se6
155 112 246 200 10,367 9,663 52,978 0 0 20.1 119.8

Table 16.--Yield table for Stand 12, Kaniksu National Forest,
Trout Creek Ranger District, Haines Point

Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 bd.-£t: Accretion Mortality x d.b.h. x height
Ft2 Ft3 Ft3 Inches Feet
60 286 48 78 1,013 565 604 145 11 5.6 40.3
70 254 87 112 2 aoe 1,991 3,741 148 18 dead 55.4
80 234 117 134 3,652 3,164 12,855 165 24 9.6 64.7
90 219 145 151 5057 4,343 19,983 193 35 DEO Tene
100 205 173 168 6,637 53665 27,633 212 60 2a 81a
ILO 190 196 179 8,159 6,944 34,889 209 107 LOSS 88.4
120 71 206 183 9,182 T5187 39 ,640 198 165 14.9 95.3
130 149 200 175 9,503 8,013 41,343 169 215 sya 101.8
140 125 181 157 9,039 7,618 39 ,586 166 225 16:3 108.0
150 103 162 144 8,464 7,080 36,909 129 258 M7 210 114;,,.2
160 81 133 121 73475 6,008 31,483 0 0 L735 120.3

16

Table 17.--Yield table for Stand 13, Kaniksu National Forest,
Noxon Ranger District, Squaw Peak

a

Volume per acre

Total Merchantable Scribner

Age _Trees/acre BA/acre CCF ft3 ft3 bd.ft. Accretion Mortality x d.b.h. x height
Ft? Ft3 Ft3 Inches Feet
85 91 91 99 3,681 3,402 18,079 67 18 3.5 65:25
95 86 100 104 4,168 3,865 20,901 68 Pz 14.6 71.9
105 81 109 108 4,636 4,297 25.07 7 66 DS 156 T1802
115 Tal 116 M12 5,062 4,677 26,099 71 26 16.6 84.5
125 73 124 1a7 5,513 5.064 28,589 BS 28 L736 90.9
135 70 N32 120 5,959 5,484 S1,.073 US, 31 18.6 96.6
145 66 138 122 6,378 5,873 33,414 70 34 19.5 101.9
155 63 143 124 6,743 6,214 35,, 390 13 36 20.4 106.9
165 60 148 25 7, U4 6,559 37,482 Te 39 2182 1115.4
75 S57, 153 127 M455 6,879 39,494 TS 41 22.1 LLS6
185 55 US7 128 75770 Thom Wife) 41,339 0 0 22.9 119.5

Table 18.--Yield table for Stand 14, Kootenai National Forest,
Libby Ranger District, Granite Creek

Volume per acre
Total Merchantable Scribner

Age _Trees/acre BA/acre CCF ft3 ft3 bd. ft. Accretion Mortality x d.b.h. x height
Ft? Ft3 Ft3 Inches Feet
37 1S 45 54 872 599 1,180 80 es 8.5 38.7
47 105 63 69 1,625 15219 3,629 92 8 1055 54.3
57 99 80 81 2,464 S77 73,263 99 12 12. 65.0
67 94 94 91 5555 Zo 10,901 112 16 L5ES 74.4
WA 90 109 100 4,287 Se 2k 14,724 118 2D 14.9 82.8
87 85 122 107 5255) 3,913 18,528 27 26 16.2 90.4
97 81 136 115 6,266 4,638 22,396 130 a 5 OF 2
107 TT 149 ei 7,260 5. SOD 26,561 129 36 18.8 103.5
iby, 73. 160 NEPAL 8,198 6,039 30,674 UZ 44 201 109.4
2:7 68 168 130 9,035 6,658 34,509 129 55 21S 114.9
137 63 ZS 132 9,784 75231 38,443 0 0 22.6 120.4

Table 19,--Yield table for Stand 15, Kootenai National Forest,
Rexford Ranger District, Alkali Lake

Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 bd. ft. Accretion Mortality x d.b.h. x height
Ft2 Ft3 Ft? Inches Feet
24 55 16 20 198 129 0 60 2 aed S)L.1
34 50 32 34 782 586 1,741 85 5 10.8 56.4
44 48 48 471,597 1,207 5,214 95 6 13.5 73.0
54 46 62 58 2,484 1,865 8, 715 104 10 157 85.5
64 44 75 67 3,421 2,560 PAPE) 108 14 Wed 95.6
74 42 87 7S 4,356 LPAI ES. 16,771 132 18 19:55 104.0
84 40 102 84 5,496 4,150 22,519 3 25 21.6 Iti,2
94 38 114 91 6,494 4,917 27,947 126 28 23.4 117.4
104 37 126 97 7,482 5,671 33,431 WS5 32 25.6 122.9
114 35 N37 103 85 S11 6,447 39 , 329 126 37 26.8 W277
124 33 147 107 9,406 7AN14 44,620 0 0 28.4 32)..1

17

Table 20.--Yield table for Stand 16, Kootenai National Forest,
Troy Ranger District, Cheer Creek

Volume per acre
Total Merchantable Scribner

Age _Trees/acre BA/acre CCF ft3 ft3 bd.ft. | Accretion Mortality x d.b.h. x height
Ft2 Ft3 Ft3 Inches Feet
25 200 1a 34 117 0 0 18 2 Ee. 20.9
35 167 20 46 273 56 0 26 3 4.6 29.9
45 146 30 S7 498 353 0) 32 5 Gel 38.5
55 131 38 66 762 689 37 38 7 Td 46.6
65 119 46 re) 1,071 1,032 J}. LO 48 9 8.4 54.6
75 109 56 81 1.5455 1,391 2,654 5l 14 9.7 62.4
85 99 63 87 1,823 1,705 3013 61 19 10.8 69.8
95 90 Ti 93 2,247 2,040 4,937 60 24 12:0 76.9
105 81 76 97 2,609 2,299 5,650 61 27. rigor | 83.5
LS 74 81 100 2,956 2,529 6,159 66 30 14°,2 89.8
125 67 86 103 3,521 2,763 6,544 0) 0 SiS 95.7

Table 21.--Yield table for Stand 17, Kootenai National Forest,
Warland Ranger District, Cripple Horse

Volume per acre

Total Merchantable Scribner

Age _Trees/acre BA/acre CCF ft3 ft3 bd.ft. Accretion Mortality x d.b.h. x height
Ft2 Ft3 Ft3 Inches Feet
35 159 50 63 776 497 676 130 5 7.6 5283
45 146 86 90 25023 1,466 3,549 161 9 10.4 53.9
55 139 118 110 3,540 2,626 9,932 173 14 V2 68.6
65 133 145 126 515.150 3,824 16,946 191 20 V422 79.6
75 128 173 140 6,839 5,095 24,106 193 27 15.7 88.6
85 123 197 151 8,492 6,321 $1,001 203 34 L751 95.8
95 118 220 162 10,179 Tyodd 38,213 196 41 18.5 101.9
105 VAS: 241 170 LS P27 8,740 45,295 192 48 19.8 107-1
115 108 258 178 13,167 9,829 52,347 187 54 20.9 1116
125 104 274 185 14,495 10,829 58,946 175 60 2230 115.6
135 100 285 191 15,643 11,698 64, 866 0 0 22.9 LLSS2

Table 22.--Yield table for Stand 18, Lewis and Clark National Forest,
White Sulphur Springs Ranger District, Deadman #3

Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 bdsft:. Accretion Mortality x d.b.h. x height
Ft2 Ft3 Ft3 Inches Feet
24 380 22 49 182 0 0) 55 5 SZ 1556
34 318 45 76 702 272 0 56 8 Sal. 29.8
44 281 61 90 Lee 879 0 42 12 6235 37,<6
54 254 68 95 1,481 1,237 458 47 13 720 42.4
64 231 76 100 1,822 17591 3,124 52 15 7.8 46.9
74 212 85 105 2,198 1,951 6;.737 55 16 8.6 Sl
84 197 93 110 2,586 2,295 9,627 59 16 935 5S
94 184 102 116 3,007 2,642 11,862 65 18 LO.) 58.9
104 173 lil 122 3,478 3,026 14,108 65 21 10.9 62.4
114 163 120 127 3,921 3,388 16,269 64 25 11.6 65.7
124 1S3 127 130 4,319 3. 716 18,198 0 0 L235 68.8

18

Table 23.--Yield table for Stand 19, Lewis and Clark National Forest,
White Sulphur Springs Ranger District, Deadman #2

Volume per acre

Total Merchantable Scribner

Age _Trees/acre BA/acre CCF yee ft3 bd.ft. Accretion Mortality x d.b.h. x height
Ft2 Ft3 Ft3 Inches Feet
24 340 16 40 131 0) 0 46 2 2.9 14.8
34 281 ST 65 567 PALI 0 59 7 4.9 29.1
44 248 54 82 1,087 975 103 41 11 6.3 38.8
54 223 62 88 LS 87 eeSy/A TS) 46 12 ioe 43.8
64 204 70 93 15720 Lea TZ. 3,607 53 14 7.9 48.5
74 187 79 100 Qer led Dh ee VAN], 6,674 53 15 8.8 52.9
84 174 88 105 2,497 2,438 9,301 59 15 9.6 5.7.0
94 163 97 Teal 2,934 2,830 113736 62 Le 10.4 60.9
104 154 106 117 S585 2,993 13,936 68 21 WS 64.5
114 145 116 25 3,859 3,343 16.225 65 26 21 67.9
124 136 123 126 4251 3,670 18,154 0 0 12.9 TESO

Table 24.--Yield table for Stand 20, Lewis and Clark National Forest,
White Sulphur Springs Ranger District, Deadman #1

Volume per acre

Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 bd kt. Accretion Mortality x d.b.h. x height

Ft Ft3 Ft3 Inches Feet

23 300 12 34 97 0) 0 31 2 2.8 US.
35 245 Qi 50 386 140 0 50 5 Aa5 26.0
43 2S 43 67 834 578 83 41 8 6.1 37.6
53 191 52 qS 1,159 963 S15 43 10 Tal 43.7
63 174 60 82 1,487 1,503 2,781 47 12 8.0 48.7
TS 160 69 87 1,835 1,627 6,251 51 13 8.9 532
83 149 Tah 94 25220 1,960 8,358 SS 14 9.7 S75
93 140 86 99 262k 2,288 10,391 61 15 10.6 61.5
103 ney? 95 106 5,072 2057 12,678 63 19 NALS 6552
113 124 104 igen 3,508 3,020 14,798 67 24 12.4 68.7
123 1S Av 116 3,936 35.379 16,872 0 0 135.5 722.0

Table 25.--Yield table for Stand 21, Lolo National Forest,
Missoula Ranger District, Teepee Creek

Volume per acre

Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 bd ttt. Accretion Mortality x d.b.h. x height

Ft? Ft3 Ft3 Inches Feet
49 979 106 188 1,676 1 OZ 1,497 ANS 15: 4.4 22.2
59 811 146 204 205.7 Vi i 3,220 L257, Sul yews 29.8
69 657 LAS 210 3,618 25511 5,675 Lia7 Ball 7.0 37 38
79 525 182 199 PA) 3, 145 8,490 115 65 8.0 a5
89 423 182 186 4,775 3,644 D272 114 iS 8.9 B22
99 346 181 174 5,185 4,056 14,008 105 Ta 9.8 58 a2
109 288 Meyer 162 5,460 4,334 16,420 102 78 10:6 63.55
119 244 172 T55 54,702 4.5735 18,584 90 7 Te 68.1
129 208 165 147 54,825 4,710 20,206 89 74 Ae Ah 72.4
139 179 161 141 5,971 4,849 21,691 82 G2 12.8 7625
149 156 156 134 6,068 4,946 22,916 6) 0 33S SOS

19

Table 26.--Yield table for Stand 22, Beaverhead National Forest,
Dillon Ranger District, Dinner Station

Volume per acre
Total Merchantable Scribner

Age _Trees/acre BA/acre CCF ft3 ft3 bd.ft. Accretion Mortality x d.b.h. x height
Ft2 Ft3 Ft3 Inches Feet
45 370 46 78 600 191 103 141 Hf 4.8 2453
55 325 98 126 1,934 1,604 3,596 201 15 7.4 38.0
65 297 156 169 3,789 3, 35:7 1357.0 241 26 9.8 47.8
75 278 210 201 5,946 5,216 24,470 290 49 11.8 56..:2
85 258 262 238 8,350 7,248 35,982 300 LD: 13:6 6355
95 233 294 259 10,243 8,793 44,573 272 225 L562) 69.8
105 199 289 250 10,735 Oe 7 46,605 255 300 16.3 74.9
115 162 262 224 10,279 8, 701 45,009 2357 340 Iypae 79.5
125 125 225 190 9,250 7,775 40,275 186 346 Biz 83.8
135 89 178 149 7,645 65.362 33,047 125 355 19.1 88.0
145 58 120 107 5,547 4,444 23,175 0 0 19.5 9TSS

Table 27.--Yield table for Stand 23, Beaverhead National Forest,
Wisdom Ranger District, Tie Creek Burn

Volume per acre
Total Merchantable Scribner

Age _Trees/acre BA/acre CCF ft3 ft3 bd.ft. Accretion Mortality x d.b.h. x height
Ft2 Ft3 Ft3 Inches Feet
7 280 5 29 35 0 0 LZ 1 1.9 9.5
27 211 14 34 197 14 0 37 5 S75 2282
37 176 27 47 S31 326 0 46 6 Ser) 35.8
47 156 39 59 927 746 264 37 9 6.8 45.8
7 142 A7 66 1,212 1,053 1,879 42 10 7.8 50.6
67 130 55 TS 15539 1,364 4,987 52 11 8.8 Sy
77 121 65 80 1,948 L212 755A 5. 53 ]e2 9.9 59.7
87 114 74 87 2; 559 2,047 9,607 59 14 10.9 64.0
97 107 83 93 2,807 2,417 1732 62 19 EL9 68.1
107 100 91 99 3,243 2,780 13,813 68 25 12.9 72a
a7 93 98 103 3,676 3,145 15,906 0 0 13.9 75.8

Table 28.--Yield table for Stand 24, Flathead National Forest,
Glacier View Ranger District, Camas Creek

Volume per acre
Total Merchantable Scribner

Age _Trees/acre BA/acre CCF ft3 ft3 bd.ft. Accretion Mortality x d.b.h. x height
Ft2 Ft? Ft? Inches Feet
65 199 34 51 722 385 0 49 8 5.0 39.4
75 177 45 67 1, L350 829 424 36 10 6.8 47.8
85 161 Sl 12 1,386 1,071 1,974 37 ath 18 Si2e
95 148 56 76 1,640 1 281 3,535 41 12 8.4 S635
105 137 62 80 1,930 1,493 4,876 43 13 9.1 60.6
115 128 68 84 25252 1,696 6,182 47 14 9.9 64.6
125 120 74 88 2,565 1,908 7,341 5l 16 10.6 68.5
135 112 80 92 2,919 2127 8,339 50 20 11.4 W222
145 105 84 94 3,221 2,301 95 21'5 Sl 24 12 al 15:38
155 98 87 96 3,494 2,449 9,776 54 30 I2ZE8 79,2
165 91 90 97 35-759 2,566 10,125 ) 0 13:55 82.5

Table 29.--Yield table for Stand 25, Flathead National Forest,
Glacier View Ranger District, Cedar Flats

Volume per acre

Total Merchantable Scribner

Trees/acre BA/acre CCF ft3 ft3 ba ete Accretion Mortality x d.b.h. x height

Ft? Ft3 Ft3 Inches Feet
48 286 65 93 1,418 968 834 138 14 6.5 42.0
58 258 101 PAKS 2,662 2,055 5,564 159 19 8.5 5158
68 239 136 147 4,062 3.074 10,803 178 26 10.2 59.8
78 224 167 166 SAS) 4,062 15,823 196 42 sp eae 67.0
88 209 195 182 75,116 4,974 19,456 212 dS Syl US
98 191 216 194 8,505 5,709 21,819 202 128 14.4 79.8
108 170 22:1 194 9,246 6,003 2222915 186 185 Loin 85.4
118 145 209 181 9,254 $5859 2s 27 I 165 215 16.3 90.5
128 BRS) 188 161 8,749 5,419. 19,197 143 239 170 9524
138 95 160 140 7,792 4,714 16,309 122 255 7.6 100.1
148 72 VST 119 6,660 3,961 Se 567 0 0 18.2 L045

Table 30.--Yield table for Stand 26, Flathead National Forest,
Swan Lake Ranger District, Bond Creek

Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 Bee bd.ft. Accretion Mortality x d.b.h. x height

Ft2 Ft3 Ft3 Inches Feet
62 US 60 Tey 1,408 Is $22 4,756 199 i eo 60.1
72 vil 114 116 3,352 2,946 SPARS ites 229 17 Ly. 77.6
82 68 163 145 5,446 4,444 18,662 235 30 21.0 90.2
92 64 203 165 7,501 53.623, 225983 270 43 24.1 100.5
102 61 245 186 9,778 6,646 25,973 279 58 Chek 109.3
ee, 57 283 205 11,983 7,346 27,240 281 75 SO ai 117.0
122 54 317 224. «14,047 7,739 27,138 288 91 32.8 12528
Wy Syl 349 242 16,016 7821 25,922 282 108 35.6 129.8
142 47 Sid, PASI 175747 ToT 24,336 254 125 38.2 US5e
SZ 44 397 268 19,037 T5507 250535 230 139 40.5 139.8
162 41 414 207 19,943 7,465 Zion 0 0 42.8 144.1

Table 31.--Yield table for Stand 27, Gallatin National Forest,
Bozeman Ranger District, Face Draw

Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 bd. ft. Accretion Mortality x d.b.h. x height

Ft? Ft? Ft? Inches Feet
25 SiS 47 73 675 457 700 S5 7 ee 26.1
35 279 63 92 1,154 876 1,044 44 10 6.5 35°30
45 252 WS) 99 1,497 1,274 1,848 47 12 Fes 39.9
55 231 82 105 1,846 1,640 3,750 54 14 8.1 44.6
65 213 92 111 Be2S2 2,029 6,653 59 LS 8.9 49.0
75 198 102 118 2,689 2,421 9,990 64 16 Oy. SSal
85 186 113 124 3,161 2,828 12,638 63 19 10.5 57.0
95 175 a2 129 3,607 5192 14,746 68 211 1.3 60.6
105 164 130 135 4,072 SR ore 16,793 66 2 12 64.0
115 154 137 138 4,477 3; 902 18,654 66 52 12.8 O72
125 144 142 140 4,826 4,187 20,228 0 0 13.4 70 A

21

Age

21
$1
41
51
61
71
81
O1
101
111
124

100
110
120
130
140
150

Age

Trees/acre

407
346
307
278
253
255
217
203
191
180
168

Trees/acre

208
187
L/S
162
144
119
89
57
31
19
13

Trees/acre

295
248
210
178
152
130
111
96
84
75
66

Table 32.--Yield table for Stand 28, Gallatin National Forest,

BA/acre
Ft2

Zg
ss)
70
78
88
98
107
17
128
137,
144

Table

BA/acre
Ft2

4S
94
142
182
210
206
176
125
64
36
24

CCF

63

88
100
105
111
sly,
25
129
136
140
144

Bozeman Ranger District,

Total

ft

267

883
1,348
1,699
2,084
2,527
2,980
3,459
3,994
4,486
4,918

Volume per acre
Merchantable

ft3

0

448
1,040
1,438
1,832
2,248
2,636
3,033
3,475
3,878
4,234

Wildhorse
Scribner

bad vit. Accretion

Ft3

0 66

0 56

0 48

1,069 53

4,018 61

7,409 63

10,817 66

UST AT. 74

16,337 74

185 7 73

20,817 0

Mortality

Ft3

33.--Yield table for Stand 29, Kootenai National Forest,

CCF

63
110
147
170
183
175
147
110

66

44

31

Total
ft3

960
Diss
4,455
6,404
8,090
8,547
7,747
5,729
3,007
1,668
1,068

Volume per acre
Merchantable

ft3

697
2,064
3,319
4,505
5,534
5,784
5,228
3,908
2,089
1,207

835

Scribner
bd. ft.

833
5,404
16723
16,021
18,359
17,478
13,877
8,537
4,797
3,175
2s

Rexford Ranger District, Pinkham Creek

Accretion

Ft3

Mortality

Ft3

Table 34.--Yield table for Stand 30, Lolo National Forest,
Ninemile Ranger District, Spring Creek

BA/acre
Ft

98
114
124
127
130
128
127
124
122
120
17

CCF

136
138
138
134
131
125
120
11S
aN
108
104

Total
ft3

2,448
3,152
3,749
4,169
4,540
4,793
5,003
5,159
5,284
5,412
5,508

Volume per acre
Merchantable

ft3

1,956
2,567
3,084
3,476
3,821
4,052
4,239
4,381
4,499
4,617
4,706

22

Scribner
bd ft.

6,397
9, 369
12,256
14,755
17,263
19,227
20,885
22.967
23,507
O47 37
25,703

Accretion
Fte3

95
96
89
91
85
83

Mortality
Ft?

25
37
47
54
59
62

Inches

te
12

Kid baht

Inches

X idsibiahy

Inches

re
FOWUWWONAUNW
DDWWOrFrAWFAEN AW

CKPWRUUNUNUN ENC

xud bens

WMOrWUNWONNAA

x height

Feet

Iie
30.
Sif:
42.
46.
Sle
555
S85
62:5
65.
68.

NINFPONNUOUFSN WH

x height
Feet

40.
53).
633
7a
193
85;
91:
955
98.
100.
101.

NWWNINDN WH OO

x height
Feet

47.
56.
64,
Tas
Oi
8%
86.
90.
94,
98%
1 Oiles

OFAN WNAArAIAMN

Table 35.--Yield table for Stand 31, Colville National Forest,
Colville Ranger District, Robins Creek
Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft3 ft3 bdiaikt.. Accretion Mortality x d.b.h. x height
Ft2 Ft3 Ft3 Inches Feet
60 178 42 76 884 664 Dons 88 6 6.6 Seal
70 161 69 101 1,705 1,434 6,159 bit 10 8.8 46.2
80 149 96 122 2 ea 2,464 11,266 130 15 10.9 S50)
90 139 123 140 3,867 3,590 U7 103 159 22 127, 63.8
100 131 153 158 5,234 4,911 24,911 188 30 14.6 72.2
110 124 184 a7 6,814 6,413 $45 352 204 40 16.5 80.0
120 1A, 215 195 8,454 7,971 43,868 225 50 18.3 87.3
130 112 246 217 10,205 9,646 54,094 226 62 20a 94.0
140 106 ZZ 234 11,842 11,219 63,653 225 73 27 100.2
150 102 295 250 LS5565 2725 72,847 240 85 23.1 105.9
160 97 318 266 14,916 14,278 82, 362 0 0 245 LIv2

Table 36.--Yield table for Stand 32, Colville National Forest,
Kettle Falls Ranger District, Long Shot Mine

Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF fee ft? bdiadkt ; Accretion Mortalit x d.b.h. x height

Ft2 Ft3 Ft? Inches Feet
45 122 46 62 1,442 1,214 $1633 77 10 S25 63.3
55 1S 62 76 2 7, 1,820 7110 86 igs 10.0 70.4
65 106 Ta 89 2,843 2,438 1 SS rAe 88 20 1156 76.9
75 99 90 97 S58 3,007 14,879 98 32 12.9 82.9
85 91 101 104 4,183 35/8 18,154 97 Sy 14.2 88.7
95 82 106 107 4,631 33951 20,309 95 81 15.4 94.2
105 72 105 104 4,774 4,074 21,160 95 106 16.4 99.5
115 60 99 98 4,672 3,984 ZO, 722 74 122 17.4 104.7
125 48 87 87 4,190 3,587 L835 772 64 124 18.2 109.9
LSS 38 74 75 3,598 3,097 16,305 48 116 19.0 11'S 22
145 28 60 63 2395 2,544 13:,.563 0 0 19.7 120.8

Table 37.--Yield table for Stand 33, Colville National Forest
Colville Ranger District, Box Canyon
Volume per acre
Total Merchantable Scribner
A Trees/acre BA/acre CCF ft3 ft? bd.ft. Accretion Mortality x d.b.h. x height

Ft2 Ft3 Ft3 Inches Feet
45 55 55 44 719 633 2,043 79 4 LORS Soe)
55 S52 54 61 15475 1,328 6,068 90 7 LBiga 1355
65 50 UP 75 2,299 2505 10,492 94 11 16.4 86.2
75 47 89 85 3,124 2,888 14,902 107 16 18.6 96.3
85 45 106 96 4,037 3,740 19,992 110 20 20.8 104.9
95 42 121 104 4,928 AS Sl, 25,063 119 26 22.9 112.4
105 40 137 WZ 5,864 5452 30,514 123 31 25.0 119.0
aS) 38 153 120 6,779 6,313 S6),.202 119 37 VAG PA 125.0
125 36 166 126 7,596 7,090 41,353 2S 43 29 ee 130.4
135 33 178 131 8, 396 15859 46,442 118 48 S125 135:.3
145 31 187 134 9,091 8,530 51,063 0) 0 Soe 1 139.8

Z9

Table 38.--Yield table for Stand 34, Colville National Forest,
Sullivan Lake Ranger District, Hanlon Meadows

Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF ft? fe bd. ft. .Accretion Mortality “x.dibvh.) x height

Ft? Ft3 Ft3 Inches Feet
45 67 28 39 837 664 1767 48 2 8.8 61.6
oS 65 39 50 1,296 1,006 5:2 5s 93 i) 10.4 69.8
65 64 49 59 1,793 356 5,299 53 6 ula) Tae
75 62 57 66 2,266 1;}662 6,746 58 10 1 Sil 84.0
85 ie) 65 72 2,746 i955 T9271. 61 16 14,2 90.4
95 56 vial 76 $5295 2,206 8,788 61 27 1c 96.4
105 52 75 78 53,057 2,370 9,248 58 40 16%,3 102.1
115 47 iS 77 53.720 25429 95299 58 49 17.1 10755
125 42 74 75 3,804 2,429 9,136 54 54 18.0 1aAZiE5
135 ST 72 G2 3,798 2,379 8,795 51 54 18:9 a7)
145 32 69 69 3,763 2,304 8,338 0 0 19S L219

Table 39.--Yield table for Stand 35, Colville National Forest
Colville Ranger District, Joslin Meadow

Volume per acre
Total Merchantable Scribner

Age Trees/acre BA/acre CCF feo ft bd.ft. Accretion Mortality x d.b.h. x height

Ft? Ft3 Ft3 Inches Feet
54 141 5i/ 2 2,028 1,655 6,244 118 14 8.6 69.4
64 131 78 91 3,070 2,643 11,436 103 21 10.5 80.5
74 122 93 102 3, 884 3,350 T6.3125 103 31 11.8 86.5
84 114 105 109 4,599 3,940 19,740 DS 47 13.0 92.1
94 104 114 114 5257 4,490 22,963 Pa2 Fz: 14.1 97.5
104 94 117 115. 5,656 4,812 24,778 108 101 Sill 102.6
114 82 114 Pe: 5,720 4,849 255.116 95 126 16.0 107.5
124 69 105 103 5,409 4,594 23,904 86 LAT L667 P1232
134 58 95 94 5,003 4,266 22,238 71 119 17.4 116,49
144 47 84 84 4,521 3, 886 20,395 58 111 18-51 W207
154 38 73 75 35990 3,446 18,082 0 0 18.8 126.6

Table 40.--Yield table for Stand 36, Colville National Forest,
Sullivan Lake Ranger District, Johns Creek

Volume per acre
Total Merchantable Scribner

Age __Trees/acre BA/acre CCF ft3 ft3 bd.ft. Accretion Mortality x d.b.h. x height

Ft? Ft? Ft3 Inches Feet
15 173 ni 25 104 8 0 22 2 3.4 20 51)
25 145 221i 38 305 140 22 44 4 Sl 34.1
35 128 35 54 710 720 752 44 6 Tal 49.1
45 116 45 63 1,084 1,184 2,088 49 8 8.4 60.4
55 108 54 Fl 1,501 1,625 4,549 63 9 9.6 71.0
65 101 65 79 2035 1,952 7 Ou4 72 NZ 10.9 80.8
75 95 77 88 2,634 2,362 10,873 he) 16 nen | 89.9
85 90 87 94 3,224 2,877 14,131 80 23 L335 98.3
95 84 96 100 3,803 3,419 17,410 80 eal 14.5 106.2
105 78 102 104 4,295 3,880 20,196 80 45 S35 1163.45
145 72 106 105 4,639 4,234 22,524 9 0 16.4 120.6

24

YY U.S. GOVERNMENT PRINTING OFFICE: 1980—677-121/018 REGION NO. 8

Graham, R. T., and J. R. Tonn.

1980. Case study: growth and development of forest stands in
the Northern Rocky Mountains. USDA For. Serv. Res. Pap.
INT-255, 24 p. Intermt. For. and Range Exp. Stn., Ogden, Utah
84401.

Tree diameter and height growth were compared for nine habitat
types. Ten-year diameter growth was highly variable among habitat
types as was 10-year height growth. High variation in both diameter
and height growth also occurred within habitat types. Thirty-six
local yield tables are presented, one for each stand in the study.

KEYWORDS: Stand yield, diameter growth, height growth, habitat type,
Northern Rocky Mountains

Graham, R. T., and J. R. Tonn.

1980. Case study: growth and development of forest stands in
the Northern Rocky Mountains. USDA For. Serv. Res. Pap.
INT-255, 24 p. Intermt. For. and Range Exp. Stn., Ogden, Utah
84401.

Tree diameter and height growth were compared for nine habitat
types. Ten-year diameter growth was highly variable among habitat
types as was 10-year height growth. High variation in both diameter
and height growth also occurred within habitat types. Thirty-six
local yield tables are presented, one for each stand in the study.

KEYWORDS: Stand yield, diameter growth, height growth, habitat type,

Northern Rocky Mountains

The Intermountain Station, headquartered in Ogden,
Utah, is one of eight regional experiment stations charged
with providing scientific knowledge
ecosystems.

The

to help resource
managers meet human needs and protect forest and range
Intermountain Station
Montana, Idaho, Utah, Nevada, and western Wyoming.

includes the States of
About 231 million acres, or 85 percent, of the land area in the
Station territory are classified as forest and rangeland. These

dustries; minerals for energy and industrial development; and
year.

water for domestic and industrial consumption. They also

lands include grasslands, deserts, shrublands, alpine ‘areas,
provide recreation opportunities for millions of visitors each

and well-stocked forests. They supply fiber for forest in-
are maintained in:

Field programs and research work units of the Station
Boise, Idaho

State University)

Bozeman, Montana (in cooperation with Montana
University)

Logan, Utah (in cooperation with Utah State
Missoula,

Montana (in cooperation with the
University of Montana)
Moscow, Idaho (in cooperation with the Univer-
sity of Idaho)
Provo, Utah (in cooperation with Brigham Young
ES, University)
FAO" Reno, Nevada (in cooperation with the University
ft:
cH, = of Nevada)
en 7
co : =)
J
C-, a,
ae! Dy