The impact of the
three irrigation rates on biosolids salinity and acidity, biomass
production and metal extraction was assessed by testing for differences
between the three treatment blocks (LIF, MIF and HIF)
using one-way ANOVA (IBM SPSS Statistics 20). Changes in biosolids
salinity and acidity, biomass production and metal extraction
within each treatment and between seasons were tested using oneway
ANOVA (IBM SPSS Statistics 20). Homogeneity of varianceswas
tested using Levene's statistic and post hoc comparisons between
groups were made using LSD for equal variances and Dunnett's T3
for unequal variances.