Tree Measurement

Overview

At this station Senior contestants will measure 4 standing trees in order to estimate the volume of wood that may be obtained from them. Unlike in the national contest, however, contestants will not estimate the volume of the wood in an entire forested area. They will only measure specified trees, including the volume of wood in each tree.

For each tree, Seniors will identify the species and estimate diameter, merchantable height, and volume. For the purposes of this contest, diameters will be measured and recorded in even 2-inch diameter classes. Tree heights will be measured in 16-foot logs to the nearest full half-log. The smallest tree that will be included for this contest station will be 10 inches DBH and one log merchantable height. Merchantable height will be measured from stump height to either an 8-inch top diameter, a major fork, or a serious defect that affects more than half the tree's diameter at that point.

Tree volumes can be found on the table below, which will be provided on the contest scoresheet.

 

Volume Table

 

HEIGHT (NUMBER OF 16-FOOT LOGS)

DBH

1

2

3

4

5

10

36

48

59

66

73

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12

56

74

92

106

120

128

137

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14

78

105

132

153

174

187

200

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16

106

143

180

210

241

263

285

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18

136

184

233

274

314

344

374

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20

171

234

296

348

401

440

480

511

542

22

211

290

368

434

500

552

603

647

691

24

251

346

441

523

605

664

723

782

840

26

299

414

528

626

725

801

877

949

1,021

28

347

482

616

733

850

938

1,027

1,114

1,201

30

403

560

718

854

991

1,094

1,198

1,306

1,415

32

462

644

826

988

1,149

1,274

1,400

1,518

1,637

34

521

728

934

1,119

1,304

1,447

1,590

1,727

1,864

36

589

826

1,063

1,274

1,485

1,650

1,814

1,974

2,135

38

656

921

1,186

1,428

1,670

1,854

2,038

2,224

2,410

40

731

1,030

1,329

1,598

1,868

2,081

2,294

2,494

2,693

 

Scoring

Scoring will occur as follows:
- One point for each correct tree identification
- Two points for each correct DBH
- Two points for each correct tree height
- Two points for each correct tree volume

The total possible score will be 7 points per tree, or 28 points for the set of four trees.

You will need a Biltmore stick that fits your arm length. You can make your own Biltmore stick by purchasing a yard stick or a blank stick or strip of wood, and taping a scale to your stick.

 

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