124 FORESTS, WOODS, AND TREES 
acre. Another plot on poor but deep sandy soil, with some 
iron pan, on the Gaywood Estate, King’s Lynn, 91 years old, 
216 trees per acre, 65 feet high, contained 4733 cubic 
feet (quarter girth measurement under bark), equal to an 
average annual increment of 52 cubic feet per acre. 
Corsican Pine.—This species is a much more vigorous 
tree than Scots pine in most parts of the British Isles. On 
the sandy heaths of Surrey, Sussex, Hampshire, and Dorset 
it produces a considerably larger volume of timber, probably 
as much as 90 cubic feet per acre per annum, for the first 
forty years on the best sites. It grows freely in dry situa- 
tions and on soil containing lime, and even succeeds on clay. 
It bears drought well, thriving on a grassy hill with a south 
exposure in Somerset, where beech and larch had died. 
This is due to the thick layer of humus produced by the 
leaf-fall of this pine, which keeps the soil cool and moist. 
Having a deep root-system it is very storm-firm, and 
resisted better than any other conifer the gale of December 
1913, when over a million trees were blown down in 
Perthshire and Forfarshire. It bears the constant prevail- 
ing wind well, and on this account is valuable for planting 
in shelter belts near the sea and in hilly districts. Cor- 
sican pine succeeded better on sand-dunes at Holkham, 
Norfolk, than any other species, producing natural seedlings 
in great abundance, many of which are now as tall as the 
parent trees, attaining 30 to 35 feet in height in twenty 
years. The tree helps materially in defence against sea- 
erosion. See Quarterly Journal of Forestry, ii. 107 (1908). 
Corsican pine also proved much more successful than Scots 
pine on the sand-dunes at Culbin, Morayshire, “ owing to 
its adaptability for growing on sand and to its power of 
resisting wind.” See Zrans. Roy. Scot. Arbor. Soc. xxix. 
25 (1915). 
Plantations of Corsican pine on exposed sites in Wig- 
townshire and in Wales produce a considerable volume of 
timber, the height growth being about 50 feet at the end 
of forty years. On the Healey Estate, Northumberland, 
ee SA Ss 
