Mas aV^f^ 



M I V >^ 



Figure 6. — The order of segment tallies. 



stem first, then return to the fork and proceed up the 

 larger stem. 



Figure 6 contains diagrams illustrating the order of 

 tallying segments. The numbers indicate the order of 

 tallying. 



Field Estimation of the Segments 



Classification of the segments is best done with aid of 

 "segment poles," 1-inch square aluminum tubes 5 feet 

 long, scaled with colored tape (see fig. 7). (The segment 

 poles are a modification of McClure's [1968] tree height 

 poles.) Red 1-foot and yellow ' 2-foot marks on the poles 

 aid the estimation of segment lengths. Alternating 

 yellow and black 2- and 4-inch wide bands at the pole's 

 base aid in estimating segment diameters. A segment 

 pole is placed against the lower stem and branches 

 (where most of the wood is found) for correct length 

 classification. A peg in one end of each pole permits 

 the poles to be connected together and placed upward 

 into a tree crown. Also, use of the segment pole should 

 eliminate diameter misclassification of segments within 

 the lower portion of the tree. The midpoint diameters of 

 large segments (10 inches and larger) that are within 

 reach should be measured with a diameter tape. 



FT 



5 - 



IN 



-J 



7/8 X 7/8 X 12-INCH 

 HICKORY OR PLASTIC PEG 



-SHEET METAL SCREW 

 -YELLOW 



RED 



BLACK 



1-INCH SQUARE ALUMINUM TUBE 



Figure 7. —A construction diagram for a 

 "segment pole" made of 1-inch-square alumi- 

 num tubing. 



a 1.5-inch minimum diameter that qualify as segments 

 are counted as you proceed up a stem. Do not back up 

 and guess the size of small segments after all large 

 stems have been tallied (previous estimators have made 

 large errors by miscounting small segments). Whenever 

 a fork is encountered, always proceed up the smaller 



How to Record Segments 



Tally segments on the tree segmentation form by 

 using the dot count method (see fig. 8). Blank forms at 

 the end of this publication are included for use by the 

 reader. For segments with diameters larger than 16 



10 



