Apart from the control plot, all plots were treated with only
1 L of the effluent biofertilizer. The maize plants were allowed to
grow under the specified treatment conditions for four months
(November 01, 2005–March 01, 2006). Thereafter, roots, stems and
leaves were collected. This was done to assess the effect of effluent
application and time of application on the growth parameters
of the maize plant. Data were taken during this period on the following
parameters: plant height, stem girth, leaf number, leaf area
and biomass yield. The chemical analyses of the nutrient and water
composition ofthe water lettuce plants after wastewater treatment
were performed using the methods outlined in Fonkou et al.(2002)