878 JOURNAL OF FORESTRY 



The silvicultural objects to be secured in marking each class of stand 

 are incorporated in the rules. In addition to these objects, there is the 

 further definite and reasonable purpose to meet practical logging re- 

 quirements by designating as large a percentage of the total stand as 

 is consistent with good silviculture from the species which are market- 

 able at a profit on their own merits and within these species the largest 

 amount of merchantable material. 



The marking rules as outlined for the Coeur d'Alene Forest, together 

 with the silvical data on both white pine and its associates, which have 

 a bearing on marking and which form the basis for the rules, are be- 

 lieved to be of sufficient interest to be given in detail : 



Marking Rules for Stands of the Western White-pine Type on the 

 CcEUR d'Alene National Forest 



January 75, igi/ 



Classification of Western White-pine Stands 



A. Stands which contain a minimum of about fifty trees per acre, between 

 6 inches and 14 inches d. b. h., thrifty trees suitable to increase in growth after 

 a cutting and exclusive of hemlock and defective trees of other species. 



1. Stands which contain practically all trees below 14 inches d. b. h. 



2. Stands which contain sufficient trees over 14 inches d. b. h. to justify a log- 

 ging operation. 



B. Stands which contain less than about fifty trees per acre, as described 

 above. 



1. In which small trees of desirable species between 6 inches and 14 inches 

 d. b. Ii. occur frequently. 



2. In which there are practically no small trees, but in which there are thrifty 

 trees, including some white pines, capable of living through a second rotation. 



3. In which there are no white-pine trees evidently capable of living through 

 a second rotation. 



PART II 



Objects of Marking 



These rules are in accordance with, and Parts I and II contain the subject- 

 matter in modified form of, the rules for the white-pine type as a whole, which 

 have been approved by the Forester and are given below. 



MARKING RULES FOR THE WESTERN WHITE-PINE TYPE 



Timber in the western white-pine type will be marked for partial cutting 

 whenever there can be left fifty or more thrifty trees'between 6 inches and ap- 

 proximately 14 inches d. b. h. of desirable species. This partial cutting will be 

 a thinning and light improvement cutting in pole stands. In older stands it will 

 be a cutting to a flexible diameter limit of 14 inches to 16 inches for white pine, 



