Table 4: Global Poisson test for multiple comparisons.

Classes of treatmentSamples comparedSample size -valueDegrees of freedomSignificance level

C + H2O 45× + As 45× 12 (3 × 4 T°)57630.31711 **
C + H2O 45× 8 (2 × 4 T°)3845.1777n.s.
C + As 45× 8 (2 × 4 T°)38427.9307 ***
H2O 45× + As 45× 8 (2 × 4 T°)38415.0327 *

C = control; T = temperature; n.s. = not significant.
* P 0.05; **P  .01; ***P  .001.