2.6. Statistical analysis
Experimental data were subjected to one way analysis of variance
(ANOVA), using Genstat 13 (release 13.1; Lawes Agricultural
Trust, Rothamsted Experimental Station, Rothamsted, UK). The
effects of treatments were determined from the least significant
differences test (Fisher’s LSD) at P ≤ 0.05 where the F test was significant.
All the assumptions of ANOVA were checked to ensure
validity of the analysis. The data of two years were not pooled
because error mean squares over years were heterogeneous.