Fig. 7

Redundancy analysis of the bacterial community compositions in the soil collected from farmland. Soil samples with pH ≤ 4.5, 4.5 < pH ≤ 5.0, 5.0 < pH ≤ 5.5, 5.5 < pH ≤ 6.0, 6.0 < pH ≤ 6.5, 6.5 < pH ≤ 7.0, 7.0 < pH ≤ 7.5, 7.5 < pH ≤ 8.0, 8.0 < pH ≤ 8.5, and 8.5 < pH < 9.0 were labeled as pH 4.5, pH 5.0, pH 5.5, pH 6.0, pH 6.5, pH 7.0, pH 7.5, pH 8.0, pH 8.5, and pH 9.0, respectively