A SAMPLE CASK 153 



1>. Calculated by Average Yearly Growth of Ripe Timber. 



AREA AGE STOCKED 



ACRES. YEARS. .IN O.I VOLUME IN CUBIC FEET. 



70 10 0.9 70 X 0.9 X 10 X 93 = 5&5o 



130 20 0.7 130 X 0.7 X 20 X 93 = 169200 



60 30 0.8 60 X 0.8 X 30 X 93 = 134000 



200 40 0.7 200 X 0.7 X 40 X 93 = 520000 



1 50 50 0.7 1 50 X 0.7 X 5 X 93 = 487000 



40 60 0.8 40 X 0.8 X 60 X 93 = 178200 



Total 650 acres : 1 547900 cubic feet. 



Ga. Actual Growing Stock per acre : 2380 cubic feet. 



c. Comparing Gn, or Normal Growing Stock to Ga or Actual 

 Growing Stock : 



NORMAL ACTUAL 



GROWING STOCK GROWING STOCK 



PER ACRE PER ACRE 



CUBIC FEET. CUBIC FEET. 



Calculated on Average yearly Growth 



of ripe Timber 2800 = Yr/2 2380 



Calculated by Yield Tables 2450 2110 



5. Normal Current Growth, or current yearly growth on sixty 

 acres of regulated forest. 



a. Calculated from the yield of the sixty-year old stand, the 

 average yearly growth of ripe timber, the Current Growth is 



Yr/r = 5600/60 = 93 cu. ft. per acre. 



b. Calculated from Current Growth as given in Yield Table 

 for fully stocked land. 



AREA ACRES. AGE YEARS. VOLUME IN CUBIC FEET. 



10 10 460 



10 20 740 



10 30 1050 



TO 4O II5O 



10 50 I 100 



IO 60 IIOO 



Total 60 acres 5600 



Normal Current Growth per acre : 93 cubic feet. 



