Part II] Hole: Regeneration of Sal (Shorea robusta\ Forests 49 
(a) As most of the young growth now existing in the type of forest here 
dealt with appears to have originated under shade, the best and 
most natural method of securing regeneration must consist in 
encouraging the growth of seedlings under shade. 
The following considerations, it is believed, dispose of this 
objection : 
(1) most of the shade in the existing forests is the result of long 
fire-protection, and was not present when a considerable 
proportion of the young growth now in evidence first 
originated ; 
(2) the Dehra Dun experiments have proved that the growth 
of sal seedlings in the shade is extremely slow, that a 
seedling requires not less than 40 years to develop a shoot 
5 feet high in the shade, whereas in cleared patches or 
strips this height can be attained in6-7years. Our object, 
obviously, should be not to perpetuate a state of affairs 
under which the establishment of regeneration is extremely 
slow and unsatisfactory but to improve upon it as far as 
possible. 
(b) The Dehra Dun experiments are on too small a scale to justify 
conclusions as to the suitability of the system on a large scale. 
In the first place, all other systems which have been tried on a 
similar small scale have invariably given inferior results to 
those yielded by the proposed system. In the second place, 
until we know enough about the different factors influencing 
growth to be able to explain correctly the results obtained, 
work on a large scale is apt to be misleading and to cause 
waste of time and money. To discover the effect of indivi¬ 
dual factors on growth much detailed observation work, 
involving the counting and accurate measuring of large 
numbers of seedlings, is essential and it is impossible to do 
this satisfactorily on a large scale. When results can be 
consistently obtained on a small scale, we only require a 
suitable organization of labour in order to obtain them on a 
large scale. 
(c) If the strip system is best why does not sal regeneration establish 
itself in quantities on fire-lines ? 
In the first place many fire-lines are too wide, and others run 
in the wrong direction. 
[ 211 ] 
