title: Arkansas rice rhizosphere and root plaques
organism: uncultured bacterium
description: U-CF (Unamended-continuous flood): These plots had not been exposed to any As-containing products for at least the 20 years and had soil-As concentrations of ~5 mg kg-1.  The plots were continuously flooded and had a water depth of ~10-cm until one week before harvest in 2008. Equal quantities of community DNA from each of three field-level replicates were composited into one sample per treatment and sequenced for 16S rRNA.