View Full Table | Close Full ViewTable 1.

Results of a mixed model statistical analysis of data from the eight soils with high enough water potential to complete germination. The experimental factors and interactions are listed in order of the significance of their effect, as indicated by the F value. Also listed are the numerator and denominator degrees of freedom, and the probability of a greater F value.

 
Type III Tests of Fixed Effects
Effect Num DF Den DF F Value Pr > F
Temperature 1 192 923.33 <0.0001
Water Potential 7 192 195.13 <0.0001
Cultivar 5 192 43.00 <0.0001
Lot(within Cultivar) 6 282 7.07 <0.0001
Temperature × Water Potential 7 192 6.23 <0.0001
Temperature × Cultivar 5 192 2.97 0.0131
Water Potential × Cultivar 35 192 2.70 <0.0001
Temperature × Water Potential × Cultivar 35 192 1.80 0.0070



View Full Table | Close Full ViewTable 2.

Time (days) for split plot experimental units (eight seeds on one side of a petri dish) to reach 75% germination. Mean of two temperatures and three replications (n = 6). Values within parenthesis in the last four rows of data indicate the number of experimental units that attained 75% germination, if less than six.

 
Soil (water content, g g−1) Soil water potential Bruehl
Eltan
ORCF-102
Skiles
Stephens
Tubbs 06
lot A lot B lot A lot B lot A lot B lot A lot B lot A lot B lot A lot B
MPa days to 75% germination
Ritzville (0.091) -0.52 3.5 3.2 3.0 3.2 3.7 3.5 3.7 3.5 3.5 3.5 3.3 3.5
Walla Walla (0.100) -0.61 3.5 3.5 3.5 3.3 3.5 3.7 4.0 3.8 3.7 3.8 3.5 3.7
Shano (0.071) -0.89 3.5 3.2 3.2 3.0 3.5 3.5 3.7 3.7 3.5 3.5 3.5 3.5
Shano (0.062) -1.14 3.7 3.5 3.5 3.5 3.5 4.0 4.0 4.2 3.8 4.2 3.5 3.7
Walla Walla (0.086) -1.37 5.7 5.3 4.0 4.0 5.0 5.0 6.2 5.7 5.7 4.8 5.3 5.7
Ritzville (0.069) -1.38 5.2 4.8 4.2 4.3 5.0 5.5 5.5 5.7 5.0 4.8 4.7 5.0
Shano (0.055) -1.39 4.7 4.0 3.8 4.2 4.5 4.8 4.8 4.7 4.5 4.5 4.5 4.7
Walla Walla (0.084) -1.57 5.2 4.7 3.8 4.5 4.8 5.5 5.8 5.3 5.5 5.0 4.8 5.2
Shano (0.044) -1.86 –† 25 (1)
Ritzville (0.055) -2.62 17.7 (3) 15 (2) 9.0 12.8 (5) 15 (4) 13 (2) 19 (3) 19.5 (2) 14 (1) 16.6 (5) 14 (2) 15.3 (4)
Walla Walla (0.073) -2.78 18 (2) 17 (3) 9.3 13.5 18 (3) 17.8 (5) 18 (3) 18 (3) 14 (1) 16.2 (5) 21 (1) 23.7 (3)
Ritzville (0.051) -3.16 25 (1)
None of the experimental units attained 75% germination.