In the best performing treatment (treatment 3), 64.2% of the
variance in nitrate concentration (r =
−0.801), 26.8% of the variance
in organic nitrogen concentration (r =
−0.518), 18.0% of the
variance in ammonia concentration (r =
−0.424) and 23.3% of the
variance in TKN concentration (r =
−0.483) could be explained by
the experimental condition. (