Location and identification of the output fields are indicated below: 



Item 



Column 



Format 



Units and merchantability limits 







(see table 1) 



1 



11 



Run number 



2-5 



14 



Problem number 



6-8 



13 



Plot number 



9-11 



13 



Tree number 



12-15 



14 



Species 



16-18 



13 



Age 



19-21 



13 



Section number 



22-23 



12 



Section length 



24-28 



F5.1 



Height 



29-33 



F5 . 1 



Diameter 



34-37 



F4.1 



Bark thickness 



38-41 



F4.2 



Gross volume 



42-48 



F7.2 



Cull volume 



49-55 



F7.2 



Net volume 



56-62 



F7.2 



Surface area 



63-69 



F7.2 



Form factor 



70-73 



F4.3 



or grade 



71-72 



A2 



Top diameter for tree 



74-78 



F5.2 



Code for detail or total 



79 



11 



Number of forks in tree 



80 



11 



TREE DATA USED 

 For Identification 



Six items identify the computed data for each tree. On the printed output these 

 are labeled as RUN, PROB. NO., PLOT NO., TREE NO., SPECIES, and AGE. The first pair 

 can be varied if more than one set of calculations is needed from a particular collec- 

 tion of tree data. The last four items are directly associated with the original tree 

 data. Although their names are suggestive, in a specific context their meanings are 

 arbitrary. For example, if the trees had been measured during a'3P cruise (Grosen- 

 baugh^) the last four variables might represent sale identification, tree number, 

 stratum, and KPI, respectively, and the output headings would be changed accordingly. 



For Gross Volume, Surface, and Length 



Tree data needed for computation of gross volume in cubic feet consist of a 

 sequence of diameters and either lengths of intervening portions^ or cumulated length 

 from the base of the tree. These measurements may be obtained by tape or caliper 

 measurements of felled trees, or by optical dendrometer measurements of standing trees 

 At each fork, a section should be measured below the fork on the main stem, and a fork 

 code associated with this section. Another section is recorded immediately above the 

 fork on the main bole, and measurements on up the main bole are continued to the top, 

 with positions of succeeding forks recorded in the same way. When the top of the main 

 bole is reached, the sequence continues up the boles of each preceding fork starting 

 with a section just above the crotch. Multiple forks should be measured and recorded 

 in a sequence such as is diagramed in figure 2. 



Grosenbaugh, L. R. STX- -FORTRAN 4 program for estimates of tree populations from 3P sample 

 tree measurements. U.S. Forest Serv. Res. Pap. PSW-13, 49 pp. 1964. 



4 



When diameters and intervening lengths are recorded, the dianieter at the top of the section is asso 

 ciated with the length of the section. 



4 



