602 Forestry Quarterly 



to freeing advance growth or removing the inferior coppice shoots 

 in such a manner as to encourage seed production from either 

 standards or the more advanced coppice shoots. Planting may be 

 undertaken to secure the necessary stock. The usual plan is to 

 complete the establishing of the new stand in this second period of 

 30 years. The stand then established is thinned and tended for 

 three subsequent periods of 30 years each, by which time the 

 usual rotation of 120 years has been established. 



In order that the annual yield of the forest may be kept as nearly 

 constant as possible, the area is usually divided into four series 

 before conversion operations are begun, the conversion of the forest 

 is undertaken one series at a time, series II being started when the 

 regeneration period in series I is completed, the coppice manage- 

 ment being kept up in each series until its turn comes for con- 

 version operations. 



There are certain forests where it is considered more profitable, 

 not only to convert the forest from coppice to standard, but also 

 to convert the standards from broad-leaf to conifers. An example 

 of this was seen at the small forest of Faye de Montrond on the 

 Jura plateau. This forest was coppice on a 25-year rotation with 

 standards on 120-year rotation, the species being oak, beech, ash, 

 maple. This is being changed to Silver fir high forest for the sake 

 of the greater profits expected. The broad-leaf forest yielded 

 $1.50 per acre per annum; the Silver fir forest is expected to yield 

 $12 per acre per annimi. The Silver fir forest is to be managed 

 on a rotation of 120 years. The forest is divided into four felling 

 series, each to be worked over in 30 years. Operations for con- 

 version were begim in 1860. During the following 25 years the 

 coppice was allowed to grow in three of the felling series, but was 

 cut as usual on the other. 



The first felling series was taken in hand in 1886, at which date 

 it was covered with coppice 25 years old. The treatment fore- 

 cast for it at that date provided that it should be gone over three 

 times at 10-year intervals during the period 1886 to 1915, this be- 

 ing accomplished by dividing the block into 10 annual coupes and 

 working over each coupe three times. 



The treatment given the block between 1886 and 1895 consisted 

 of cleaning up the area, removing the undergrowth, the poorer 

 coppice shoots and standards, amounting to about 10 per cent of 



