The moisture content of soil was measured
gravimetrically by drying 50 g of soil sample at 105 °C
for 24 h. The total metal content of soil before
incubation was determined after digestion by Atomic
Absorption Spectrophotometer (Table 3). The total soil
Carbon (%) was calculated by the dichromate digestion
method (Kalembasa and Jenkinson, 1973) while the total
soil Nitrogen (%) was determined by the Kjeldahl
digestion (Bremner, 1965).All the analyses were done
in triplicates.
The results were analyzed by two-way analysis of
variance (ANOVA) at 95 % confidence interval.
Differences between the control and other treatments
were assessed using least significant difference (LSD).