34 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



be well done for less by good management. If seedling plants 

 can be used the cost will be materially less. These amounts 

 should include the conveyance of the plants from the nursery 

 to the plantation. 



To summarise, therefore, the capital cost of the lo-acre 

 project — 



Preparation, 10 acres at 5s. .... ^2 10 o 



20,000 plants, seed-bed to ground, at 15s. per 



1000 . . . . . . . 15 o o 



Fencing, if required, on an expanding plan for 

 40 acres 1760 yards at is. 3d., one-fourth 

 thereof ....... 



Planting, 10 acres at 30s. .... 



Total 

 or ;^6 per acre. 



This estimate contemplates a plantation where every cost is 

 incurred except rabbit netting. It is a high capital charge, 

 but it can usually be reduced upon any estate where enclosures 

 are already erected, and always where a planting-plan is 

 arranged to cover several years' consecutive operations. The 

 figures have been worked out, because during the last two years 

 much misunderstanding has arisen through inaccurate calcula- 

 tions of the cost of planting or of re-planting. 



The Forestry Commission has engaged upon an investigation 

 of tree-growth throughout the United Kingdom, the results of 

 which have been published in Bulletins Nos. i and 3. 



The yield in the recorded measurements of typical woods 

 are divided into different classes, and it is not at the moment 

 possible, until the work is further developed, to take the 

 maximum or the minimum increments as typical of any 

 particular locality. The existing figures, however, when 

 examined, disclose a mean annual increment of the average 

 quantity classes of four species at different ages to be as 

 follows : — 



1. Douglas . . . 172 cubic ft., quarter-girth 



2. Norway spruce . 123 ,, „ 



3. Scots pine . -85 ,, „ 



4. European larch . 70 ,, ,, 



450 



