Table 8. --Simple linear' regressions for estimating weight 

 of foliage and branahwood components of indivi- 

 dual branches from intermediate and suppressed 

 trees. Regressions are of the form Inw = a + b 

 (Ind) where w = weight, lb; d = branch basal 

 diameter, inch. Bias corrections for log trans- 

 formations were omitted because they over 

 compensated 



Stat i St ic 





PP 



■ DF 



■ GF 





C 

















a 



-1 



.412 



-1.077 



-0.6685 



-0 



. 8837 



b 



1 



.902 



2.023 



2.092 





.010 



n 



42 





48 



51 



48 





r2 





. 86 



. 78 



. 92 





94 









TO 0. 



24 INCH 







a 



-3 



.103 



-1.551 



-1.514 



-2 



325 



b 



1 



.549 



1 . 934 



1.842 



1 



863 



n 



34 





47 



50 



48 





r2 





. 77 



. 89 



.92 





91 









0.25 TO 



0.99 INCH 







a 



-3 



103 



-0.7598 



-0.3637 



-1 



103 



b 



1 



549 



2. 800 



3.514 



2 



857 



n 



34 





26 



28 



33 





r2 





77 



. 88 



.88 





86 









1 . 00 TO 2 



.99 INCHES 







a 



-2 



457 



i/ 



-2.551 



_ 2 



456 



b 



3 



735 





6.269 



6 



695 



n 



9 







5 



10 





r2 





42 





.79 





70 



Regression was nonsignificant. 



Figure 9. — Weight per branah 

 of foliage and hranehwood 

 hy size oZass as a function 



of branch basal diameter 0-5 1-0 1.5 2.0 2.5 



for grand fir. BRANCH BASAL DIAMETER (IN) 



21 



