TREES FOR SPECIAL SOILS 89 



also, probably, Nordmann's Silver Fir, Corsican Pine, 

 Cupressus macrocarpa, and Thuya gigantea. 



On fairly Shallow Peat Soil l with Deep Mineral Subsoil. 

 The same trees, also Silver Fir, Douglas Fir, and 

 Thuya gigantea ; and Alder, if moist enough. 



Sand Dunes on the Sea-Coast. Austrian Pine, Pinus 

 pinaster, Scots Pine, Corsican Pine, Pinus Banksiana, and 

 (probably) White Spruce (P. alba). 



For Sea-Coast planting if the Soil be good enough. The 

 same trees, and also Cupressus macrocarpa ; and, if some- 

 what sheltered, Sycamore, Norway Maple, White Poplar, 

 Evergreen Oak, Turkey Oak, and Pinus insignis. 



And, as shrubs Sea Buckthorn, Tamarisk, Escallonia, 

 Euonymus, Gorse, and Privet. 



For Localities subject to late Spring and early Autumn 

 Frosts (if the soil be suitable). Scots, Corsican, and 

 Austrian Pines, Birch, White Poplar, Sitka Cypress, and 

 Aspen Poplar. 



And lastly, good deep loams with sufficient moisture are 

 suitable to all trees. 



Ash is very particular, and prefers a deep, calcareous, 

 marly loam. 



And in the case of Douglas Fir, Weymouth Pine, Pinus 

 pinaster, Spanish Chestnut, and Tulip trees, any excess of 

 lime seems to act as a poison. 



THE PECULIARITIES OF GROWTH AND THE CON- 

 DITIONS SUITED TO THE GROWTH OF TREES. 



(A.) Concerning the growth peculiar to individual trees, 

 the chief points to consider, exclusive of volume increment 

 and financial returns, are : 



(1) The Shape of the Crowns. 



(2) The Relative Height Growth. 



(3) The Persistency of Side Branches. 



(4) The Shade-bearing or Light-demanding qualities of 



different species of trees. 



1 These soils will probably be too acid for broad-leaved trees. 



