Table 8. — Analysis of variance for plant height, 1973 field trials 



Cm I rrtn 



DF 



IVIO 



p 



Prnh <- F 





Replication 



1 



4.0139 



0.7453 



0.6019 





Species 



2 



1,339.1885 



248.6608** 



.0001 





Storage 



2 



38.2001 



7.0930* 



.0029 





Planting date 



3 



137.7046 



25.5690** 



.0001 



_ 



Species X storage 



4 



16.8481 



3.1284* 



.0263 



5 



Species X planting date 



6 



33.2164 



6.1676* 



.0003 



X 



o 



Storage X planting date 



6 



6.9492 



1.2903 



.2866 



:r 



Species X storage X 











s 



planting date 



12 



5.0360 



.9351 



.5247 



>- 



Error 



35 











'Significant at the 95 percent level of confidence. 

 "Significant at the 99 percent level of confidence. 



Table 9.— Analysis of variance for stem production, 1973 field 

 trials 



Source 



DF 



MS 



F 



Prob. <F 



Replication 



1 



0.9239 



0.1040 



0.7475 



Species 



2 



780.3405 



87.8789** 



.0001 



Storage 



2 



127.3136 



14.3376** 



.0001 



Planting date 



3 



451.0427 



50.7947** 



.0001 



Species X storage 



4 



25.1816 



2.8358* 



.0383 



Species X planting date 



6 



65.4484 



7.3705** 



.0001 



Storage X planting date 



6 



24.9826 



2.8134* 



.0241 



Species X storage X 











planting date 



12 



14.5019 



1.6331 



.1271 



Error 



35 



310.7904 



8,8797 





'Significant at the 95 percent level of confidence. 

 "Significant at the 99 percent level of confidence. 



Growth (fig. 7).— Three years after planting, the average 

 height of the surviving spruce trees was 15 inches (38.10 cm), 

 ranging from 1 1 inches (27.94 cm) to 18 inches (45.72 cm). For 

 all storage treatments, trees from the April 18 planting were 

 taller than trees planted on June 20(17 inches [43.18 cm] vs. 

 13 inches [33.02 cm]). There was no significant difference in the 

 average height that could be attributed to storage treatment. 



Stem production (fig. 8).— Planting date strongly influenced 

 spruce stem production. Over the 3-year period, average produc- 

 tion per 100 planted trees ranged from 1 16 ft (35.36 m) for the 

 April 18 planting to 49 ft (14.93 m) for the June 20 planting. 

 Production extremes varied from 35 ft (10.67 m) for fresh stock 

 planted on May 30 to 135 ft (41.15 m) for frozen stock planted 

 on April 18. Storage treatment, averaged over all planting dates, 

 also had a significant influence on productivity, with fresh stock 

 producing much less (59 ft [17.98 m]) than either frozen (77 ft 

 [23.47 m]) or refrigerated (85 ft [25.91 m]) stock. 



40 |- 



30 " 



10 - 



Averages 

 Storage Treatments 



Fresh - 14 " a 

 Ret. -16 "a 

 Frozen - 15 " a 



Planting Dates 



4/18 - 17 " a 

 5/9 - 14"a,b 

 5/30-15" a,b 

 6/20 - 13" b 

 average - 15 " 



April 18 



May 9 May 30 



PLANTING DATE 



June 20 



Figure 7. — Effects of storage regime and planting 

 date on third-year height of field-planted Engelmann 

 spruce 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). 



300 



2H! i 



100 



Averages 

 Storage Treatments 



Fresh - 59' b 

 Ref. - 85 ' a 

 Frozen - 77 1 a, b 

 Planting Dates 



4/18 - 116 1 a 

 5/9-74' b 

 5/30 - 55 ' b 

 6/20 - 49 ' b 



April 18 



May 9 May 30 June 20 



PLANTING DATE 



Figure 8. — Effects of storage regime and planting 

 date on third-year stem production of field-planted 

 Engelmann spruce 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). 



8 



