THE THEORY AND PRACTICE OF WORKING PLANS 159 



(a) Soil and moisture requirements. 



(b) Influence of elevation and aspect. 



(c) Tolerance. 



(d) Reproduction. 



(e) Injuries: fire, storm, frost, drought, fungus, 



insects, etc. 

 Detailed estimates, maps, forest descriptions, etc., of 

 survey units or other units, unless filed elsewhere for 

 greater convenience. 



SECTION THREE 



THE PLANTING PLAN 



This is properly an integral part of every working plan, 

 but in order to avoid confusion, and not to encumber the 

 subject of timber regulation, detailed mention has been reserved 

 for this section. 



Some planting operations are necessary in every well-regu- 

 lated forest, whether it be to eke out a too scanty natural repro- 

 duction or to restock former forest areas where natural repro- 

 duction is out of the question. 



Just as a general cutting plan is drawn up for the intended 

 cuttings in the ensuing working period, so a general planting 

 plan is drawn up to cover all the operations of artificial repro- 

 duction which are contemplated during the ensuing working 

 period. From out this general planting plan the administra- 

 tive officer in charge of the forest selects those areas whose 

 restocking he deems of the most immediate importance and 

 incorporates them into an annual planting plan which, with the 

 approval of his superior officers, becomes the planting schedule 

 for the ensuing year. 



As a preamble to the general planting plan should come a 

 genera] discussion of the areas needing artificial reproduction, 

 the extent to which it is expedient to go in replanting com- 

 mensurate with the results to be obtained, and other phases of 



