;is 



LOCALITY AND FOliKST VIUJETATION , 



substiinces, wliit-li aii average (•io[> takes from the soil, per 

 acre and year : — 



Table showing the prixcipai- Mineral Substances taken Annually 

 BY vAiuous Field and Forest Crops from an Acre of Land. 



The (lata of this table justify the following conclusions: — 



(1.) The substances required by foresttrees are, (i[ualitativel^y, 

 tlie same as those required by field crops. 



(2.) Beech high forest requires for the production of leaves 

 and wood nearly as much mineral substances as an average 

 field crop ; it requires more lime, but much less of the rarer 

 substances, such as potash and phosphoric acid. 



(3.) Conifers require smaller quantities, especially Scotch 



