830 



CHAPTER V. 



CONTROL or EXECUTION AND RENEWAL OF 

 WORKING PLANS. 



It is not sufficient to prepare a working plan ; it is also 

 necessar}' to see, that its provisions are carried out ; and when 

 the period, for which it lays down the management of a forest, 

 has come to an end, a new, or rather a revised, plan must be 

 prepared. 



As the preparation of a iirst working plan is to some extent 

 based upon incomjilete data, it is of importance to keep a 

 careful record during its execution, so as to eliminate in the 

 course of time all doubtful elements. Apart from this, changes 

 in areas or in other respects may occur, which must be noted. 

 The work of control and renewal comprises, therefore, three 

 distinct operations : — 



(1.) The record of changes as they occur. 



(2.) The record of works. 



(3.) The preparation of revised working plans from time to 

 time, or renewals. 



1. Record of Lliaiitjea. 



{((.} All changes in the areas must be recorded. Part of the 

 area may be sold or exchanged, or additional areas 

 bought ; areas, hitherto used for the production of wood, 

 may be set aside for other purposes, or rirr versa. The 

 progress of the cuttings may cause alterations in the 

 allotment of areas ; natural phenomena may produce 

 changes, such as floods, landslips, etc. All such changes 

 should be noted at the close of each year, in the maps 

 as well as in the tables of areas. 



