Figure 4. Cumulative 18S rRNA copy numbers in successive extractions of clay (C1–C3) and sandy soils (S1–S3) using PS and FS DNA extraction kits.

Average and error bars (SD) of all three technical replicates are presented for each DNA extraction. (A) Clay soils extracted with PS; (B) sandy soils extracted with PS; (C) clay soils extracted with FS; (D) sandy soils extracted with FS.