THE THEORY AND PRACTICE OF WORKING PLANS 49 



(c) Area tables (by types, by divisions of area). 



(d) Age-class table (comparison with the normal). 



Any or all of these tables may be constructed as the data warrant 

 and as there is occasion for them. An age-class table is neces- 

 sary only where the distribution of the age classes plays a part 

 in the regulation of the cut. 



Tables (a), (b), and (c), together with abbreviated notes 

 on site, density, age, and salient silvical characteristics, can be 

 combined into a general stand table, that is, a tabulation 

 showing something of the condition of the stand on the several 

 units of area. Only the more important items respecting the 

 stand are included, such as merchantable and total volume 

 by classes of material (sawtimber, cordwood, ties, etc.), species, 

 age, stock density, etc. Such a table is usually supplemental to 

 map records. It is compiled from the forest description and 

 from the stand and stock tables of individual units of area. 

 The particular form which this table takes should be varied 

 to meet the needs of the working plan in question. The pur- 

 pose is to give the essential data for the regulation of the cut; 

 these essential data vary with the method of regulation which 

 is chosen. In the example the table has been made as complete 

 as is necessary even under intensive conditions. The hypo- 

 thetical data would have required a correspondingly intensive 

 forest survey. 



These data will be required for only those forests which 

 permit of an intensive management. However, the same form 

 of table, with minor modifications, applies to even the most 

 extensive conditions. For example: 



If the estimate and description is by survey units, e.g., by 

 sections, quarter-sections, or even forties, the arrangement of 

 the columns would be varied so that Col. 2 would be town- 

 ship and section, Col. 3 the quarter-section or forty. Cols. 5, 

 7, 9, II, 13, and 15 would give the area, not in acres, put in per 

 cent of total. Cols. 6, 8, 10* 12, 14, and 16 would usually indicate 

 the age only as Over-mature (0), mature (M), or young (F). 

 Cols. 23-29 would usually be recorded separately for each type. 



