108 



ON QUALITY OF SOIL. 



TOO feet in height, at the very summit of which 

 there are several very fine aspen trees which seem to 

 have grovsrn there naturally. 



It may be proper to add to these remarks the 

 two following observations : — Firsts That when 

 land has been much enriched by artificial means, 

 many trees will thrive in it, that would have never 

 done so had it been left in its natural state ; and, 

 secondly. That when the soil and subsoil consist of 

 strata different in quality from each other, it may 

 happen that a tree, which has thriven before its 

 roots penetrated to the latter, may decline after- 

 wards, and vice versa. 



As to exposure or aspect, it is perhaps of much 

 less consequence that particular attention should be 

 paid to it in the cultivation of forest trees, than is 

 generally supposed. It would at first sight appear 

 most reasonable to conclude, that all trees of the 

 more delicate species, and those that are liable to be 

 injured by spring, or autumnal frosts, would be most 

 favourably situated in a south exposure. Observa- 

 tion, however, leads us to decide differently from 

 this ; and to allow that, if the soil be favourable, 

 and the elevation not too great, a north exposure an^ 

 swers equally well with a south one. The fact is, 

 thatj if the former do not receive the sun's rays so 



