CONTENTS 



Page 



INTRODUCTION 1 



ESTIMATING THE NUMBER OF VIABLE SEED 



FOR THE AREA OF INTEREST 1 



A. Number of Serotinous Cones Per Acre .... 1 



Method 1 1 



Method 2 2 



B. Number of Seed Per Acre 6 



C. Number of Viable Seed Per Acre 6 



SAMPLE APPLICATION—NUMBER OF VIABLE SEED 



FOR THE AREA OF INTEREST 7 



A. Number of Serotinous Cones Per Acre .... 7 



Method 1 7 



Method 2 8 



B. Number of Seed Per Acre 8 



C. Number of Viable Seed Per Acre 8 



LIMITATIONS OF EQUATIONS (1) AND (2) 8 



SIGNIFICANCE OF STORED SEED PER ACRE 9 



REFERENCES 10 



ABSTRACT 



Two interim formulas for estimating the number of serotinous cones 

 in lodgepole pine stands are presented. One formula requires a 25-limb 

 sample count of serotinous cones on felled trees for which total tree 

 estimates are desired together with tree d.b.h. , crown ratio, and age; 

 although this formula is more dependable, it is also more costly in ap- 

 plication. The second formula requires only a count of trees bearing 

 serotinous cones on each plot plus average d.b.h. and average age for 

 trees on each plot. 



Methods are also presented for expanding these estimates to number 

 of viable seeds per acre, for the area of interest. 



