HomeMy WebLinkAbout1975-00-00 Circa Southern Pine Growth Rate Dial (2)� (,,,c"es) „ acv
'C �� . rhes 2 27.0 AAFA'
015 �� 3.5 21.1 , v �Q
a �' 3.5 � 7.3 4 to y e�
Cj 14.6 S . �.
4.12.7
5 11.2
5
RINGS PER 5.5 10.0 S'/
LAST RADIAL INCH 6 9.1 AVERAGE COMPOUND RATE pF
6.5 �:6 CUBIC FOOT VOLUME INCREASE
7 7.1 (PERCENT)
7'5 6.6 Most Recent Inch
8
8.5 6.2 of DBH Growth
9 5.8
L9.5 5.5
one inch 10 5'z
4.9
SOUTHER- - N PINE
GROWTH RATE DIAL SIDE yOman
TEXAS .
Merchantable Volume fro
Wth FOREST SERVICE
Rate of Individual TrnAne% ; v A Part of the I 1
CUB
IC FOOT Vni"mJTexas AnivDIRECTIpNS EREST S System ersity
1. From tree (at breast height) extract core at least
2. Count number of growth rings in last inch o f �o an inch ton
3• Locate current dbh of tree (in inches i� 9� measured from cambium layer.mum
re, to nearest one-half ring.
4. Opposite appropriate "rin S � notch at top of dial.
last inch of D8H growth. Side yr fast radial inch," read average compound rate of
Exam Ie; Cu. ft. Side 2: Bd. ft. Doyle Rule. merchantable volume increase du
�_ A tree with dbh of 8 inches, showing four gro�h ring
able cubic foot volume during this
� rings in its outer inch of diameter, has been increasing inch of diameter growth at an average rate of 20.g e
Extension of exam le: If the tree continues to
� increase in merchantable volume at an averagera percent per year, g �� merchant-
grow at four rings per inch, during the next inch of
Economic im lications: If stumpage lues to of 17.5 dbh growth it will
percent per year (9 inches dbh, 4 rings/inch).
crease at roughly the sum of the volume growth rate
increase during the inch of dbh growth, the value of
the tree value growth rate wi11 follow the formula: plus the stumpage value growth a tree
the total growth rate, and v and s are t rate. More prec sel�ll in
+ v)x(1 + S
For example, he dec. equip, of the volume and stum sere t = dec. equiv. of y
-��, a tree growing in volume at 17.5% with stum a p 9e growth rates.
5% will be increasing in total value at roughly�
P ge increasing in value at
precisely at: W.175)x(1.05 (7.5°/a + 5.0%) 22.5% - or
'\. ) - 1.234123.4%.