A SAMPLE CASE 153 



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



VOI.UMIC IX CUBIC FEET. 



70 X 0.9 X 10 X 93 = 58500 

 ] 30 X 0.7 X 20 X 93 ^ 169200 



60 X 0.8 X 30 X 93 = 134000 

 200 X 0.7 X 40 X 93 = 520000 

 150 X 0.7 X so X 93 = 487000 



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 (u-o\ving Stock to Ga or .\ctual 

 Growing Stock : 



NOUMAI, .\CTUAE 



CROWING STOCK GROWING STOCK 

 PER ACRE PER ACRE 



CUI3TC FEET. CUUIC FEET. 



Calculated on Average yearly Growth 



of ripe Timber 2800 = Yr/2 2380 



Calculated by Yield Tables 2450 21 10 



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. 



VOLUME INT CUBIC FEET. 



460 



740 



1050 



II50 



tioo 

 1100 



5600 



Normal Current Growth per acre: 93 cubic feet. 



