154 FOREST REGULATION 



6. Actual Current Growth per acre on the forest here con- 

 sidered, is as follows : 



a. Calculated by use of Yield Table : 



ARA AGE STOCKED 



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



70 10 0.9 70 X 0.9 X 46 = 2890 



130 20 0.7 1 30 X 0.7 X 7= 6730 



60 30 0.8 60 X 0.8 X I0 5 = 5040 



200 40 0.7 200 X 0.7 x 115 = 16100 



150 50 0.7 150X0.7X110=11550 



40 60 0.8 40 X 0.8 X no= 3520 

 Total for 650 acres, 45830. 



Actual Current Growth per acre : 70.5 cubic feet. 



b. Calculated on basis of Average Yearly Growth of Ripe tim- 

 ber per acre : 



AREA AGE 



ACRES. YEARS. STOCKED VOLUME IN CUBIC FEET. 



70 10 0.9 70 X 0.9 X 93 *== 555 



130 20 0.7 1 3 X 0.7. X 93= 8 45 



60 30 0.8 60 X 0.8 X 93 = 4460 



200 40 0.7 200 X 0.7 X 93 = 13100 



150 50 0.7 150 X 0.7 X 93 = 9750 



40 60 0.8 40 X 0.8 X 93 = 2980 



Total 650 acres 44290 cubic feet, or 68 cubic feet per acre of 

 Actual Current Growth. 



7. Comparison of Normal Current Growth and Actual Current 

 Growth : 



NORMAL CURRENT ACTUAL CURRENT 

 GROWTH. GROWTH. 



Calculated on basis of Average 



Yearly Growth of ripe timber 93 cu. ft. 68 cti. ft. 



Calculated on basis of Current 



Growth as per Yield Table 93 cu. ft. 70 cu. ft. 



In trying to regulate the cut of this forest by the Austrian- 

 Heyer Formula we have : 



Cut = Growth + (Ga Gn) /a. 



