RKVIKW; 



(m 



resistance to expo.siire make it a more certain crop than either larch 

 or Scots pine. Larch finds its optimum conditions on well-drained 

 slopes at moderate elevations, where there is no great degree of ex- 

 posure to the prevailing winds. Finally, the sandy soils in the valley 

 bottoms and plains seem the natural home of the Scots pine, though it 

 has also a place on light soils in the lower hills, which are too dry to 

 carry larch or spruce. 



The appendi contains the yield tables themselves and the graphs 

 showing the height growths. These are in the usual form, although 

 it is to be regretted that columns of mean annual increment and of 

 current annual increment have been omitted. There are also tables 

 showing the distribution of the sample plots according to countries, 

 geology, soil, aspect, and slope. 



The yield of Norway spruce at 60 years is of exceptional interest as 

 the following extract shows: 



U. S. Department of Agriculture Bulletin 544, "The Red Spruce," 

 gives the following figures based on second-growth stands, at 60 years 

 (when the mean annual increment culminates) : 



In working out the culmination of the mean annual increment in 

 Norway spruce grown in Britain, the interesting fact brought out is 

 that: 



