510 APPENDIX 



During the 20-year period the total production was 7.7 cubic meters per hectare per 

 year and of this total amount 5.8 was in wood 0.45 and above in diameter and only 

 1.9 in wood 0.15 to 0.40 inclusive. During this same period the wood cut totaled 5.7 

 per hectare per year of which 4.3 was from trees above 0.45 in diameter and 1.4 from 

 trees 0.15 to 0.40 inclusive. 



M. Cuif decided to allow the yield to be taken from sound trees 0.45 in diameter if 

 necessary to supplement the volume of those over 0.60 to make up the yield. The 

 calculation of the yield for 1909-1910 which by the way varies with each compart- 

 ment, gives 5.3 per hectare per year as against (a) 5.8 and (6) 7.7, the figures of the 

 amount produced (a) in 0.45 meters and over, and (6) total for the last 20 years. 



The improvement fellings in the wood 0.15 to 0.40 in diameter are estimated to yield 

 about 1.4 per hectare per year. It is interesting to note that the average prices for 

 the period 1889-1898 were 18.34 francs per cubic meter as compared with 23.14 for the 

 years 1899-1908. 



The new regulation of felling then prescribes the year of felling 1910-1919 inclusive 

 the number of the cutting area, the area in hectares, and the total amount in cubic 

 meters. Only wood from trees 0.45 and over are to be counted against the yield. 



(B) Naufrogutte working group, Forest of Ban d'Etival. Same as Corne de Lisse 

 but volume of fir is 19/20 and beech only 1/20. The area is 34.48 hectares. Method 

 of 1883 Yield Regulation. 



The old wood here includes trees 0.45 and over; the average wood 0.25 to 0.40 and 

 the small wood below 0.25. A comparison of the stocktakings in 1888 and in 1908 

 (that of 1899 appeared inaccurate) shows that: Total volume in m. c. (1888), 10,794.1; 

 (1908), 12,363.6; total volume in m. c. cut (1888-1909), 3,404.6. This signifies a pro- 

 duction of 7.2 per hectare per year as against 4.9 actual cut. This production was 4.7 

 cubic meters in wood 45 and over, and 2.5 in wood 0.15 to 0.40. The actual cut was 

 3.6 and over 0.45 and 1.3 in wood 0.15 to 0.40. 



The new cut for 1910 to 1919 is put at 1,822 for the 34.48 hectares and windfalls 

 and dead wood 0.20 and over will be deducted from the yield. The selection felling is 

 accompanied by an improvement felling to increase the growth of promising trees 

 and to clean or free young stands. 



In the calculation of the yield it is explained that the volume of the large wood (over 

 0.45) in 1909 was 7,917 c. m. and the average wood (0.25-0.40) 3,984 c. m. making a 

 total of 11,900 of which five-eighths is 7,438 and three-eighths 4,463 c. m. To counter- 

 act this excess of large wood Cuif subtracts 479 from the large wood and adds it to 

 the average wood and proceeds with the calculation of the yield as given below after 

 obtaining a growth per cent for the large wood based on the differences in volume of 

 this class of wood in 1888 and 1909 (allowing however for the passage of trees from 

 0.40 to the 0.45 class) equal to 0.9 per cent. 



7,438 X 0.009 X 50 = ^^ c m Qr fop ^ 5Q yearg (one _ third the rotation) 7,438 



m 



plus 1,673 or 9,111 equal to ^^ = 182.2 cubic meters per year or 5.2 per hectare. 



No allowance is made for the growth of the average wood since that will merely fill 

 the place left by the removal of the large wood. 



It is interesting to note that the cut for 1888-1899 was calculated at 4.5 c. m. and 

 for 1899 to 1908 at 4.4 c. m. per hectare and per year. Figures which are clearly below 

 the growth as is also the current figure of 5.2 but a comparison of the curve showing 

 the estimated normal number of trees per hectare for each diameter class (based on 

 averages of a number of (empirically) normally stocked selection stands) shows that 

 the forest is poor in trees 0.15 to 0.35 in diameter and that consequently the economy 

 will be welcome. 



