11 



Section 2. Compartments; justification of the sub-division 



adopted. 



29 No change is proposed from the Bub-division adopted in the 

 jtlan under revision. 



Section 3. Analysis of the crop. 



30 The working plan map prepared for the plan under revision 

 lias heen compared, with the crop on the ground. In some places, pro- 

 gress in natural afforestation has heen slow, hut in others it is fairly clear 

 That considerable changes have taken place. In the Apalchand 

 Jfange, areas in the Udlabdri, Phuljhora, Chel river and Apalchand Blocks, 

 shown as savannah in the old stock maps, now contain mixed forest, 

 whereas in Hanskhali and Churabhija there is no marked alteration. 

 These types not only merge into one another but are constantly changing, 

 and a stock map is constantly getting out of date. An attempt has been 

 made to rectify the areas given in the old stock map to a slight extent. 

 No sal, for instance, was shown as existing in Indong compartment 2 ; 

 whereas there are at least 100 acres of sal in this block in the north-east 

 corner alone, not to speak of small patches in the interior. There is also 

 more than 60 acres of grass and 70 acres of unproductive land in Dumchi. 

 For purposes of working, the Dainah Forest has been estimated to contain 

 7,700 ncres and the Jaldaka Forest 1,060 acres of mixed khuir and mw 

 forest, capable of being worked over for firewood, the balance being river 

 bed, savannahs and grassy churs covered with khair and sissu seedlings. 



CHAPTER II. METHOD OF TREATMENT. 



Sec/ion 7. Object nought to be attained. 



31 Sal Working-Circles. The object aimed at is to produce as 

 much sal timber of large size and good quality as possible, and it is 

 decided to utilise for fuel and other purposes trees of inferior kinds which 

 can be cut out so as to benefit the sal. 



32. Mixed Working-Circles. The object is to obtain a sustained 

 yield of firewood and produce as large a supply as possible of trees 

 which yield timber for box planking and other purposes. 



Section 2, Method of treatment adopted. 



33. Sal Working-Circles. As the number of mature sal trees is 

 comparatively small, and as trees of inferior species are numerous and, 

 in many places tend to get the upper hand, Improvement fellings are 

 prescribed. In the 8,320 acres of mixed forest included in these Working- 

 Circles the Improvement felling will closely resemble a Coppice with 

 Standards felling 



34. Mixed-Working Circles. Coppice with Standard fellings are 

 prescribed, as this is the only treatment likely to secure the objects 

 aimed at. 



Section 3. '/'he exploitable age. 



35. Sal Working-Circles- As in neighbouring forests the minimum 

 exploitable diameter for sal may be assumed to be 2'; judging from the 

 rate of growth indicated in Appendix II a sal tree of this size should be 75 

 years old. 



36. Mixed Working-Circles. From observations made on the 

 oldest coupes, it is fairly evident that a fair amount of fuel in good sized 

 billets could be obtained from coppice 16 years old- To allow a sufficient 

 margin and to give a better class of fuel, 20 years has been adopted as the 

 exploitable age for coppice. As regards the standards, which will merely 

 consist of different kinds of superior species, no age can be fixed upon, but 

 all trees which have reached a girth of seven feet will be considered ripe 

 for felling. 



