Fig. 6From: Effects of C and N application on Azotobacter and nitrogen cycle in farmland soils of central Guizhou, ChinaGroupwise comparisons of A dry weight of rape, B total nitrogen content in plants (PTN), C soil pH, D total nitrogen content (TN) in soil, E alkali-hydrolyzed nitrogen (AN) content in soil, and F soil organic carbon (SOC) content. Lowercase letters in each graph denote significant differences (P < 0.05)Back to article page