APPENDIX — CRITERIA FOR RATING PRODUCTIVITY 



695 



Other Type Groups in the Pacific 

 Northwest and California Regions 



Seed-source standards. — Seed sources judged 

 adequate for the ponderosa and lodgepole pine 

 type groups in the Pacific Northwest, and for the 

 ponderosa, western white pine, fir-spruce, and 

 redwood forest type groups in CaHfornia, when 

 in combination with favorable seedbed conditions, 

 are summarized as follows: 



Maximum effective 

 seeding distance of 

 scattered seed trees 



Forest type group and 

 region 



East side pon- 

 derosa pine in 

 California; all 

 ponderosa 

 pine in Pacific 

 Northwest. 



West side pon- ") 

 derosa pine, 

 western white 

 pine, and fir- 

 spruce in Cal- 

 ifornia. 



Redwood 



Lodgepole pine_ 



Diameter 



breast high 



(inches) 



12 to 16 



18 to 24 



26-1- 



18 to 24 



26 -f 



Distance Maximum effective seeding 



(feet) 



40 

 50 

 70 



50 

 70 



' 60 



6+ (2) 



distance from timber edge 



'Two tree heights from 

 stands containing a 

 fair proportion of 

 trees 12 inches in 

 d. b. h. and larger 

 that meet the seed- 

 tree definition. 



'Two tree heights from 

 stands containing a 

 fair proportion of 

 trees 18 inches in 

 d. b. h. and larger 

 that meet the seed- 

 tree definition. 



Two tree heights from 

 stands of mature 

 timber. 



Two tree heights. 



• Must be capable of bearing seed. Fire columns were 

 not counted as seed bearers until after 10 years of new 

 crown growth. 



2 Two or more seed trees within one tree height of point 

 were considered an effective seed source. 



Seedbed condition . — Standards for favoral. le seed- 

 bed conditions in the remaining type groups of 

 these two regions were as follows: 



Ponderosa pine type group. The seedbed 

 was considered favorable on Site III (Index 84) 

 and better when at least 25 percent of the 4-milacre 

 quadrat surrounding the observation point was 

 free of brush, sod, or other limiting cover and 

 showed evidence of scarification from logging or 

 other reduction of competition, and the area sur- 

 rounding the quadrat contained regeneration es- 

 tablished at intervals not exceeding 10 years. 

 The standard for poorer sites was the same except 

 that 50 percent of the surrounding quadrat was 

 required to be free of brush, sod, or other limiting 

 cover. 



Unstocked sample points in the ponderosa pine 

 type group which were supplied with the minimum 

 sources of seed described in the preceding tabula- 

 tion, and on which the above seedbed conditions 

 prevailed, were classed as "stocking in prospect." 

 If either the seed source or seedbed were inade- 

 quate by these standards, the point was classed 

 as "stocking not in prospect." 



Western white pine (sugar pine) and fir- 

 spruce type groups. Unstocked points supplied 



with at least the minimum seed source described 

 in the preceding tabulation and with seedbed con- 

 ditions described above as adequate for ponderosa 

 Site III and better were classed as "stocking 

 in prospect." Otherwise they were classed as 

 "stocking not in prospect." 



Redwood type group. Unstocked points sup- 

 plied with at least the minimum seed source de- 

 scribed in the preceding tabulation were classed 

 as "stocking in prospect" if the 4-milacre plot 

 surrounding the point had been scarified or had 

 ground competition significantly reduced by log- 

 ging and was at least 60 percent free of perennial 

 grasses, dense to moderately dense herbaceous 

 growth, overtopping shrubs, and noncrop trees. 



Lodgepole pine type group. Unstocked 

 points having at least the minimum seed source 

 described in the preceding tabulation were classed 

 as "stocking in prospect" if the milacre plot sur- 

 rounding the point was at least 50 percent free of 

 brush, sod, or other limiting cover. Otherwise 

 the points were classed as "stocking not in 

 prospect." 



Hemlock- Sitka Spruce Type Group in 

 Coastal Alaska 



Determination of prospective stocking was 

 based upon the sum of ratings for seed source and 

 for seedbed condition. If this sum was 5 or 

 greater, the point was classed as "stocking in 

 prospect." If the sum was 4 or less, the point 

 was classed "no stocking in prospect." 



Seed source standards. — The basis for rating seed 

 source in Coastal Alaska is summarized below: 



Number of 

 tree heights 

 from limber 

 Rating value: edge 



4 (Good) to 4 



3 (Fair) 5 to 8 



2 (Poor) 9to 11 



11-1- 



In addition to the values for distance to timber 

 edge, a value of 1 was allowed for each seed tree 

 within one tree height of a sample point in Alaska. 

 Exceptionally good seed trees within this distance 

 were given a value of 2. In no case was a com- 

 bined rating of seed source given a total value of 

 more than 4. 



Seedbed condition. — The seedbed standards used 

 are shown on page 694, and the procedure and meth- 

 ods of rating were the same as those used for type 

 groups west of the Cascade summit in the Pacific 

 Northwest Region. 



Effect of Felling Age 



In the Pacific Northwest and California Regions 

 during early stages of the survey, calculations of 

 felling-age effects were completed in the field by 

 each examiner. Later, field examiners recorded 



