Part II] Hole: Regeneration of Sal (Shorea robusta) Forests 33 
(2) In the clearings, the best and most uniform results are obtained 
in patches the diameter of which is fths the average height 
of the surrounding trees, and on strips running north and 
south the width of which is fths the average height of the 
surrounding trees. In such clearings frost does no damage. 
If the diameter of the patches and the width of the strips 
is increased much beyond this limit, weed growth becomes 
more troublesome and the seedlings suffer from drought, 
see para. 32 (2) (5) (6) (7) (9) (10) and p. 44. 
(3) Side-shade from the south is injurious, whereas side^shade from 
the east and west is beneficial and, therefore, the results 
on narrow north-south strips are uniformly good. On the 
other hand, east-west strips would give the maximum side- 
shade from the south, and it is, therefore, probable that the 
results on such strips would be decidedly inferior, see 
para. 32 (4) (6). 
(4; In cases where side-shade is received mainly from one direction 
only, that from the west which affords protection from the 
hot afternoon sun is most beneficial, see para, 32 (8). 
This indicates that it may be possible to regenerate these 
forests by progressive strip fellings passing from the east 
through the forest towards the west. Whether this can 
be done however, without causing excessive weed 
growth or subsequent damage to the young growth by 
frost or drought cannot be decided until further 
experiments have been carried out. 
(5) In the smallest clearing, viz. the 60 feet square, very little weed 
appeared during the first rains, and after this weeding was 
unnecessary, see para. 32 (9). 
(6) In the larger clearings, e.g. the 100 feet wide strip, one weeding 
at the end of the first rains, one at the beginning and end of 
the next rains, and one during the next year would probably 
be quite sufficient, i.e. 4 in all. 
Weeding should be done with discrimination and scattered plants 
of the large tufted grasses or a few woody coppice shoots 
(which can be topped when necessary) are often beneficial 
in decreasing water-loss from the plants, and in preventing 
the development of the highly injurious matted growth of 
herbaceous weeds, see para. 32 (10). 
(7) In order to diminish trouble from weed-growth, it is desirable 
to regenerate small cleared patches first, and then to gradually 
extend these areas in the form of narrow north-south strips. 
[ 195 ] p2 
