Table 2 Mean squares and levels of significance of Al and low pH in a culture solution for whole plant dry weight, needles dry weight, and needle length
From: The single and interactive effects of aluminium and low pH, or Ca/Al ratios on red pine seedlings
Source of variation | D.F | Mean squaresa | ||
|---|---|---|---|---|
Whole plant | Needle | Needle | ||
DW | DW | Length | ||
Al treatment | 2 | 0.370* | 0.148* | 22.975** |
Linear (Lin) | 1 | 0.325** | 0.147** | 20.700*** |
Quadratic (Q) | 1 | 0.045 | 0.001 | 0.275 |
pH treatment 2 | 2 | 0.055 | 0.022 | 2.881 |
Lin | 1 | 0.051 | 0.002 | 0.544 |
Q | 1 | 0.004 | 0.020 | 2.337 |
Al × pH | 4 | 0.275 | 0.061 | 11.333+ |
Lin × lin | 1 | 0.069 | 0.039+ | 10.350** |
Lin × Q | 1 | 0.016 | 0.001 | 0.647 |
Q × lin | 1 | 0.179+ | 0.010 | 0.320 |
Q × Q | 1 | 0.026 | 0.011 | 0.016 |
Error | 99 | 5.093 | 1.194 | 137.919 |