Fig. 5From: Soil factors that contribute to the abundance and structure of the diazotrophic community and soybean growth, yield, and quality under biochar amendmentRDA analysis of the relationships between diazotrophic groups, grain yield and quality, and soil environmental factors: a phylum level, b genus level, c grain yield and quality in 2021. B27, 45 t hm−2 biochar addition; B18, 30 t hm−2 biochar addition; B9, 15 t hm−2 biochar addition, B0, no biochar additionBack to article page