marginally significantP < 0.1
However, the influence of soil cultivation method on community composition of bacteria was marginally significant (significant at P < 0.1), and using the “forward selection of environmental variables” tool in Canoco 5.0 software, a significant influence of ploughing was confirmed (explaining 10.3% of the total data variability, pseudo-F = 2.3, P = 0.004).