FIG 1.

Effects of soil amendments and soil texture on the average relative abundances of the 20 most abundant families of bacteria represented by OTUs recovered from the surfaces of radish taproots (n = 3, except DC turned compost in loamy sand, where n = 2) grown in either loamy sand (LS) or silty clay loam (SCL) mixed with amendment from antibiotic-treated beef cattle (BA), antibiotic-free beef cattle (BC), antibiotic-treated dairy cattle (DA), or antibiotic-free dairy cattle (DC) or mixed with chemical fertilizer only as a control. There were no statistically significant differences in relative abundance of taxonomic groups for radishes grown among all treatments (Kruskal-Wallis, P > 0.05).