132 FOEESTS, WOODS, AND TREES 



of years, being ready for felling at 50 to 60 years old, 

 or even less. It is suitable for all parts of the country in 

 selected sites. It suffers from the wind in exposed situations, 

 and does not thrive in soils containing more than 2 per cent 

 of lime or on wet soils. It grows well enough at high 

 elevations, but only in shelter, succeeding in Wales in 

 favoured spots up to 1250 feet elevation. On wet 

 soils it is very liable to be thrown down by the wind. In 

 the young stage it is liable to injury from frost, and is 

 readily attacked by rabbits. These are its sole drawbacks. 

 It is a splendid main-crop tree for sheltered situations 

 either in the lowlands or high up in valleys in the hill 

 pasture zone, where the soil is moderately deep and not too 

 wet. It will grow fairly well on shallow soil, but then 

 makes superficial roots and is liable to be blown down by 

 the wind. It produces a fair amount of good seed in this 

 country, and in many places, as in the New Forest, 

 regenerates itself freely. At Dunster, Somerset, self-sown 

 seedlings, up to 35 feet high, occur scattered about the 

 estate. 



The yields from various plantations, published in the 

 Journal of the Board of Agriculture, 1913-1914, may be 

 summarised as follows, the volumes given being quarter- 

 girth measurement over bark : 



Taymount plantation, Perthshire, 9 '6 9 acres, 52 years 



planted; average height, 88 feet; volume, 6040 



cubic feet per acre ; annual increment, 116 cubic 



feet per acre. (See Fig. 21.) 

 Cochwillan plantation, Carnarvon, 0*42 acres, 58 years 



planted; average height, 101 feet; volume, 12,040 



cubic feet per acre; annual increment, 208 cubic 



feet per acre. 

 Llandinam plantation, Montgomery, 3^ acres, 28 years 



planted; average height, 66 feet; volume, 5563 



cubic feet per acre; annual increment, 199 cubic 



feet per acre. 

 Tortworth, Gloucester, 1*02 acres, 43 years planted; 



average height, 97 feet; volume, 7316 cubic feet 



