BRITISH FOREST TREES 



the oak, or the spruce. For sylvicultural purposes, 

 especially for the formation of mixed forests, it is important 

 to know and consider the relative rates of growth at different 

 periods of their development, particularly during the earlier 

 stages of growth. 



Ney l gives as the results of the yield tables arranged by Baur for 

 beech, Schuberg for silver fir, Lorey for spruce, and Weise for Scots 

 pine, the following average heights at ten years of age : 



The same tables show that the current annual increase in 

 height on soil of the I. (best) quality was : 



1 Lehre vom Waldbau, 1885, pp. 5459. 



