The model only with organic matter and the model with organic matter and interstitial salinity were the best models to explain canopy height variation. Stepwise deletion of terms showed that the second model did not present significant increase in deviance, therefore the model with organic matter was selected. Model analysis showed significance of the model with organic matter (p < 0.001), the model with organic matter was the best to explain canopy height variation, and it was significant (p < 0.005).