LODGEPOLE PINE 



Survival (fig. 9). — Average lodgepole pine survival was 77 per- 

 cent, and ranged from a low of 51 percent to a high of 96 per- 

 cent. Average survival of frozen and regular stock over all plant- 

 ing dates was over 80 percent, significantly better than survival 

 of fresh stock (69 percent). This difference was due to the rela- 

 tively poor survival of fresh stock planted on May 9, 30, and 

 June 20. Survival declined as the plantings were delayed, but the 

 decline was not as severe as it was with spruce (fig. 6) and larch 

 (fig. 12). 



Growth (fig. 10). — The 3-year height of lodgepole pine aver- 

 aged 21 inches (53.34 cm) and ranged from 17 inches (43.18 cm) 

 to 25 inches (63.50 cm). Refrigerated stock was significantly 

 taller (23 inches [58.42 cm]) than the fresh stock (20 inches 

 [50.80 cm]), but not significantly taller than the frozen stock 

 (21 inches [53.34 cm]). Stock planted on June 20 was 5 to 

 6 inches (12.70 to 15.24 cm) shorter than trees planted earlier in 

 the planting season. 



Stem production (fig. 11). — Lodgepole pine averaged 140 ft 

 (42.67 m) of stem production per 100 planted trees in the 3-year 

 period, ranging from 70 ft (21.33 m) to 190 ft (57.91 m). When 

 totals, by treatment, for all planting dates were averaged, refrig- 

 erated stock production was highest (160 ft [48.77 m]) and fresh 

 stock the lowest (112 ft [34. 14 m]). Frozen stock averaged 145 ft 

 (44. 19 m) of stem growth per 100 planted trees. Production from 

 fresh stock was definitely inferior to that from refrigerated and 

 frozen stock for all except the April 18 planting. Stem produc- 

 tion for the June 20 planting (89 ft [27.13 m]) was considerably 

 below that for earlier plantings (135-173 ft [41.15-52.73 m]). 



100 



\ ^> * >^ Averagi 



/ V'XRef. -82% 



*" o Frozen - 1 



a 



817. a 

 Fresh - 69% b 



Average survival = 77 ' 



Average • 



■ 91% a 



741 

 I 



61% b 

 _| 



Averages 

 Storage Treatments 



Fresh - 20" b 

 Ref. -23 "a 

 Frozen - 21 " a,b 

 Planting Dates 

 4/18-23 "a 

 5/9 - 22" a 

 5/30 - 23 " a 

 6/20 - 17 " b 

 average - 21 " 



April 18 



May 9 



May 30 



June 20 



PLANTING DATE 



Figure 10. — Effects of storage regime and planting 

 date on third-year height of field-planted lodgepole 

 pine stock. Columns, within a planting date group, 

 topped by the same letter are not significantly dif- 

 ferent (p = 0.05). Averages, of storage treatments or 

 planting dates, followed by the same letter are not 

 significantly different (p = 0.05). 



Ml 



200 



£ 100 



Averages 

 Storage Treatments 



Fresh - 112 1 b 

 Ref. - 160 ' a 

 Frozen - 145 ' a 

 Planting Dates 

 4/18 - 173 ' a 

 5/9 - 135 ' b 

 5/30 - 161' a 

 6/20 - 89 ' c 



4/18 



5/9 



5/30 



6/20 



April 18 May 9 May 30 



PLANTING DATE 



June 20 



PLANTING DATE 



Figure 9. — Effects of storage regime and planting 

 date on third-year survival of field-planted lodgepole 

 pine stock. Average survival percentages (in a row for 

 planting date and, for storage treatment, in a col- 

 umn) followed by the same letter are not significantly 

 different (p = 0.05). Survival percentage levels, within 

 a planting date, connected by arrows with an accom- 

 panying asterisk are significantly different (p = 0.05). 



Figure 11.— Effects of storage regime and planting 

 date on third-year stem production of field-planted 

 lodgepole pine stock. Columns, within a planting 

 date group, topped by the same letter are not signifi- 

 cantly different (p = 0.05). Averages, of storage treat- 

 ments or planting dates, followed by the same letter 

 are not significantly different (p = 0.05). 



9 



