534 Forestry Quarterly 



square at different distances from the bases of seed trees has 

 been plotted on cross section paper and a curve drawn which 

 curve shows the relation between distance and distribution. From 

 this curve a table was read, which shows that the maximum 

 amount of seed falls between 20 and 30 feet from the base of tree. 

 This table might be of use in connection with other data in fixing 

 the number of trees to be left per acre under some systems of 

 forest management. 



Average Number of Seedlings Growing at Different Distances 

 From the Base of Seed Trees. 



Distance (feet) No. Seedlings per Sq. Ft. 



10 8.4 



20 12.0 



30 10.6 



40 8.5 



50 6.2 



60 4.0 



70 2.5 



80 1.9 



90 1.8 



100 1.5 



110 1.2 



120 0.8 



130 0.5 



140 0.2 



150 0.0 



Germitiation : A mathematical average of the germination 

 counts on 753 square feet (.017 acres), under all canopy and 

 ground cover conditions, was 48%. The average maximum 

 was about 60%. The average minimum was about 25%. The 

 percentages seldom ran over 65 or under 25%. 



Classifying the plots according to their ground cover, we get 

 the following germination percentages : 



On one-year crop of pine needles 50%* 



On grass 53% 



On hardwood litter 28% 



The difference between the results from pine needles and grass 

 are too small to leave room for generalizations. Individual 



* These figures average 44 instead of 48%, the difference being due to 

 the necessity of excluding certain plots for which no site data were given. 



