

xviii APPENDIX. 



confirms this observation ; and a comparison of group and shelter- 

 wood fellings is entirely in the latter's favour. Innumerable in- 

 stances can be given of the influence of light on growth ; in the 

 Jutlikawala' plantation the height of deodar growing in the full 

 enjoyment of light was double that of plants growing under only 

 a light overwood of kail" 



Similarly in the case of spruce, which is reputed to be a 

 moderate shade bearer, it has been found that this tree in the 

 Himalayas is not a shade bearer at all but requires as much light 

 for its reproduction as the deodar. Troup has aptly summarised 

 the light requirements of the chir pine as follows : 



" The chir pine is one of the most light demanding of species 

 and under favourable conditions the more light admitted the 

 more successful and complete will be the regeneration. It may 

 be said that in ordinary favourable circumstances 5 to 8 good 

 seed bearers per acre are ample for affecting regeneration ; and 

 that a greater number are not only unnecessary, but may even be 

 detrimental to the establishment of a healthy young crop. This 

 statement however should not ba taken to apply universally. 

 Thus on hot slopes where the soil is stiff and the seedlings are 

 liable to suffer from insolation, protective shade is essential ; and 

 the demand for such protection may outweigh the demand for 

 light. There are instances in the Eawalpindi division, where the 

 slopes are hot and the soil is clayey, of good reproduction estab- 

 lishing itself under an almost complete canopy. We may, therefore, 

 qualify the general statement made above by saying that where 

 protection against drought is necessary the number of seed-bearers 

 per acre may have to be increased very considerably ; it may also 

 be stated that on southern slopes as a rule a larger number of 

 seed-bearers are required than on northerly aspects. 



" Opinions regarding the light requirements of the sal still differ. 

 Collier writes regarding the natural regeneration of this species 

 under the shelterwood compartment system in Haldwani. 



