THE VALUE OF WASTE LAND FOR AFFORESTATION PURPOSES. 159 
In this Table, the unit values placed upon several factors must 
vary with the species and local climate. Altitude, depth and 
character of soil, and, to a less extent, aspect and exposure, all 
vary in their importance with the degree to which they affect the 
species, and with the manner by which they are in turn affected 
by the climate. No attempt has been made, therefore, to place 
any value upon the latter, as it may be assumed to exert a fairly 
uniform influence upon localities which are similar in other 
respects, and which exist in the same district. No attempt should 
be made, however, to compare localities assessed in two widely- 
separated districts, or in districts with different physical features, 
as it is obvious that the precise climatic conditions cannot be the 
same. 
As an example of this method of assessment, the sylvicultural 
value of the sample plot in Dipton Wood, which has already 
been referred to, may be given as follows :— 
ANALYSIS OF LOcALITy—Dz1pron Woop. 
+(x 2) uae —(Deducted). 
I. Soir. 
Surface Soil—Over 3 feet, . I 
Subsoil—Impervious, . : Bh ae |r 
Moisture—Fresh, . : 3 I 
Character—Loamy, . : I 
II, SITUATION. 
Elevation—Below 750 feet, . 3 
Aspect—N.E., : - 1 zs 
Exposure—Moderate, . : S265, alles 
Slope—Below Io per cent., . I 
8 I 1| =(16+1-1) 16 
Placing a value of 5 cubic feet per acre per annum on all 
points in the first and second column, we should obtain an 
annual yield of 80 cubic feet per acre on a full rotation. Com- 
paring this estimate with what is actually on the ground in another 
sample plot a hundred years of age, growing on a similar situa- 
tion but rather lighter soil close by, we find that the latter agrees 
with the estimate. That it will do so in all cases, however, is 
