Part II] Hole: Regeneration of Sal (Sliorea robusta) Forests 43 
46. The chief points of interest are :— 
(1) In a year unfavourable to germination and early growth with 
a short rainfall at the end of June and in July, sowings in 
a cleared patch 60 feet in diameter have been much more 
successful than those carried out in the forest under shade. 
It is believed that this is due to more moisture being avail¬ 
able in the cleared patch which gets the full benefit of dew 
and very light showers which do not reach the soil in the 
shady forest. At the same time, the evaporation of moisture 
from the soil of the patch is retarded by the heavy side shade. 
(2) Both in the shade and in the open, the results in the hoed soil 
were much better than those in undug soil. 
\3) The hoed areas in Plot VI were very fairly stocked with seedlings 
well distributed throughout the area, although the percentage 
of survivals was poor, viz. only 12 per cent. This shows 
the great advantage of sowing thickly which will secure a 
fairly full stock of seedlings even in unfavourable years. 
Summary of conclusions. 
47. The following conclusions appear to be justified :—- 
(1) In an unfavourable year, with a short rainfall at the end of June 
and in July, sowings in cleared patches 60 feet in diameter 
are more successful than those in the forest under shade. 
(2) Broadcast sowings on hoed soil are more successful than those 
on undug soil. 
(3) Sowings should be done thickly, e.g. at a rate of 6 seeds per 
square foot of area, which will give a full stock of seedlings 
even in an unfavourable season. 
CHAPTER III. 
System of Regeneration proposed. 
48. The question to be considered now is the extent to which the 
results of the experimental work reported above can be incorporated 
in a practical system of sylvicultural management. As regards this 
question the results of greatest importance appear to be the following :— 
(a) the development of sal seedlings in the shade of the forest is 
very slow and unsatisfactory. This is due primarily to two 
factors, bad soil-aeration and drought. The latter is res¬ 
ponsible for widespread damage during the season of short 
rainfall from September to June. Bad soil-aeration, on 
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