16 
Indian Forest Records. 
[Vol. IV. 
Information 
required 
regarding the 
localities. 
The majority of our indigenous species which can thrive 
in such localities are of little commercial value and, of the 
more valuable species which can be induced to grow 
there, the growth, under such conditions, becomes so 
inferior as to make them practically valueless. 
(b) Similar in some respects to (a) are the forest-locked grass- 
plains which are common in our Indian forests and which 
are particularly characteristic of the Sal (Shorea robusta ) 
tracts. In such localities the extremes of temperature 
prevent the survival of any but strongly xerophilous 
indigenous growth usually of minor importance. 
In the case of both [a) and ( b ) localities it is possible that 
we may find what we require among the numerous 
valuable species of Eucalyptus, some of which, at least, 
are known to endure drought and extremes of temperature 
well and are thus able to thrive in strongly xerophytic 
habitats. In subsequent papers it is proposed to deal with 
those species of this genus the cultivation of which at 
Dehra Dun and elsewhere has given most promise of 
success. 
(c) Landslips and shifting sands. Here as in other cases, of 
course, care must be taken not to overlook the value of 
indigenous species, such as Casuarina equisetifolia for 
instance, in the afforestation of sandy littoral tracts. 
(d) On compact, badly-aerated soil. 
(e) Localities where very rapidly growing species are required 
to produce a larger volume of wood per unit of area than 
can be obtained from indigenous species. 
Some of the Australian Acacias and Eucalypts must be 
considered here and perhaps also] Albizzia moluccana, Miq., 
which is now being grown experimentally at Dehra Dun. 
(V) With a clear idea, now, as to the precise areas in which, and 
the purposes for which, we desire to introduce exotics, 
it is advisable to ascertain, as far as possible, the essential 
features of the localities with reference to their power of 
supporting a particular type of vegetation and especially as 
regards :— 
( a ) Character of the soil, sand, loam or clay; approximate depth 
of soil and slope. 
[ 140 ] 
