APPENDIX CRITERIA FOR RATING PRODUCTIVITY 



67: 



Effect of Felling Age 



14 



The following procedure was used on cutover 

 areas or portions thereof that had been clear cut; 

 it was not used on partially cut areas. At each 

 point, the species of tree stocking the point prior 

 to cutting was identified and its age or age class 

 was determined by inspection of annual rings on 

 the stump. The felling-age factor was then read 

 from tables in the appropriate type criteria, and 

 this factor was recorded as a part of the record for 

 the point. 



Sample Calculation 



Table 87 is an example of the type of field data 

 taken and the calculations applied. 



GENERAL STANDARDS OF CLASSI- 

 FICATION APPLICABLE TO ALL 

 REGIONS 



1. Species not listed in the standards as "desir- 

 able" or "acceptable" were considered "noncount" 

 in rating existing stocking. An exception was 

 made for the occasional situation where an unlisted 

 species was locally useful for a special product. 

 Field examiners were instructed to exercise their 

 judgment in rlassifjang such a species as "desir- 

 able" or "acceptable" in the locality. 



2. Species composition of the stand affected the 

 rating for existing stocking only where less than 

 50 percent of the stand was composed of desirable 

 species. 



3. No composition factor less than 50 percent 

 was used. Lower factors were raised to 50 

 percent. 



4. In rating prospective stocking, consideration 

 was given to available seed supply and to such 

 conditions as the presence of cull trees, weed 

 species, sod, or other herbaceous plant growth 

 that would preclude the establishment or growth 

 of trees. The effects of grazing, rodents, deer 

 browsing, etc., were also considered if there was 

 evidence that new seedlings were being killed, or 

 deformed to the extent that they would not 

 develop into crop trees. 



5. Any points or plots or portions thereof domi- 

 nated by a tree or trees not qualifjdng under the 

 definition of crop tree were considered nonstocked 

 regardless of other trees present or prospects for 

 regeneration, unless acceptable plans by the owner 

 to remove such trees were in evidence. 



Consideration was given by the examiner to the 

 success of past similar work, the relation of the 

 area treated annuallv to the area cut over an- 



Table 87. — Calculation of productivity rating by 

 the point method oj field examination 



Point 



Stocking, 



by species 



desirability ' 



Felling- 

 age 





Exist- 

 ing 



Prospec- 

 tive 



factor 



1 



2 



A 



"""a"" 



1. 

 1. 



3 





. 5 



4 . . 







. 5 



5 



6 



7 



8 



D 



A 



A 





. 5 



1. 

 1.0 

 1. 



9 





D 



1. 



10 





. 7 



11 . _ _ _ 







. 7 



12 



13 



14 .. 



D 

 A 

 A 



" ' b ' " ' 



A 



.7 



. 7 



1. 



15. 



1. 



16 _ . _ 





1. 



17 



D 

 D 



1. 



18 



19 



1.0 

 1. 



20 





A 



1. 















17.3 



' A = acceptable species. D = desirable species. 

 Example: 



Points stocked D = 4 + 2= 6 

 A=5+3= 8 



14 

 Existing stocking: 9-^20=45 percent 

 Existing -{-prospective stocking: 14h-20=70 percent 

 Existing -|- prospective stocking modified by composition: 



Factor —-^ = .86 .86X70=^0 percent 



14X.5 

 Felling-age factor= 17.3-:-20 = 86 percent 

 Combined rating=60X .86=52 percent 



nually, outstanding orders or contracts to accom- 

 plish the work, and similar tangible evidence 

 bearing on productivity. If he was not satisfied 

 with the evidence, or if he considered the planned 

 action to be problematical, the area was rated on 

 the basis of conditions at the time of examination. 

 6. In the event that planned slash disposal, 

 reforestation or timber stand improvement was 

 incomplete on an area chosen to be sampled, the 

 next most recent cutting in the ownership on 

 which such treatment had been completed was 

 examined. If this substitution was not possible, 

 due allowance was made for the effects of such 

 anticipated treatment if the examiner was satisfied 

 that such plans would be carried out promptly. 



