Fig. 1.

Taxonomic plot at the genus level showing the effect of DNA preservation solution on the soil microbial profiles after 24 and 110 days of landfarming. DNA was extracted using the PowerSoil Kit (Qiagen) of soils from four experimental conditions: only fertilizer no-till, rhamnolipid 0.5 g/kg and fertilizer, 5% w/w kenaf, and fertilizer and soil only (control). Numbers indicate the number of days of landfarming. Samples of 110 days of landfarming were additionally treated with a DNA preservation solution (+ PS). Bar plots of 24 and 110 + PS are biological duplicates. The legend on the right shows the genus or family level (in cases of unclassified genera) with a relative abundance higher than 10% in at least one soil sample. G+, Gram-positive; G−, Gram-negative