The results for the blackjack pine equations developed using just the uneven-aged data 

 were also satisfactory. The chi-square values for all the tests were not significant at the 

 99 percent level (the testing level). The signs on the coefficients of models 1 and 3 were, 

 however, of opposite values. This unexpected result caused the following: for stands recently 

 cut, the higher the basal area growth rate, the higher the mortality rate; while for virgin 

 stands, the opposite was true. The coefficients on models 2 and 4 were reasonable, and so 

 they were picked as the best models for uneven-aged blackjack pine. Tables 11 and 12 provide 

 the goodness-of-f it tests across diameter classes for the final models. 



The chi-square values indicated poor fits for the equations developed using both the 

 even- and uneven-aged data, and this was disappointing. So a new group of runs was tried. 

 The independent variables used in these runs are found in table 28. Of these, the two best 

 sets of equations were models 19, 20, and models 21, 22. IVhile the models are an improvement, 

 they are still significantly different at the 99 percent testing level used. The goodness-of- 

 fit tests across diameter classes for the best models (models 21 and 22) are found in tables 

 13 and 14. 



Table 28 . --Independent variables used in final set of runs for even- and uneven-aged blackjack 



pine mortality 



Model 

 number 



Independent variables 



tr 

 



U T D A P 1 





Aj, LBA2, MBA 



I ID A 



2, UdA2 



O 



dJ dAu/ , 





Aj, LBA2, MBA 



2, UdA2 



7 



R TRAPI 

 D J DAVj 1 , 





Al, MBA2 





Q 



o 



t>J dAvj^ , 



d2. 



Al, MBA2 





9 



BJBAGl, 





MBA2 





10 



BJBAG2, 



Al, 



MBA2 





11 



BJBAGl, 



D2, 



Al, Ai^, MBA2 





12 



BJBAG2, 





Al, Ai^, MBA2 





13 



BJBAGl , 





TIME, TIME^, 



MBA2 



14 



BJBAG2, 





TIME, TIME2, 



MBA2 



15 



BJBAGl, 



Al, 



Ai^, MBA2 





16 



BJBAG2 , 



Al, 



Ai2, MBA2 





17 



BJBAGl , 



TIME, TIME^, MBA2 





18 



BJBAG2, 



TIME, TIME^, MBA2 





19 



BJBAGl, 





TIME, TIME'\ 



MBA 2 



20 



B J BAG 2, 





TIME, TIME'^, 



MBA 2 



21 



BJBAGl, 





TIME, TIME'^, 



MBA2 



22 



BJBAG2, 



D2, 



TIME, TIME"^, 



MBA2 



71 



