5. No height -growth information on uneven-aged plots . --The lack of height-growth data on 

 the uneven-aged plots did preclude the development of a common even- and uneven-aged height- 

 growth model, but its absence was not critical to the dynamics of the basic components in the 

 simulator. Because some uneven-aged height-diameter data were available from both the School 

 of Forestry at Northern Arizona University and the Rocky Mountain Forest and Range Experiment 

 Station at Flagstaff, I decided to develop separate height-diameter relationships for even- 

 and uneven-aged stands. While height-diameter relationships are not ideal substitutes for a 

 height -growth model because they do not incorporate the effect of stand density upon height, 

 their use does provide a means of assessing product potential. 



The School of Forestry data came from student class measurements of 1-acre square subplots 

 made on plot 61 during 1964 and 1967. The Rocky Mountain Forest and Range Experiment Station 

 data came from one-time measurements on selected subplots of plots 71 and 72. 



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