Bacterial community data from the second National Soils Inventory of Scotland. 'SAMPLE.ID' refers to the unique sample identifier associated with the NSIS2 database (to be released publically by the James Hutton Institute); 'LAYER' refers to the paedological horizon sampled (L1: topsoil horizon; L2-4: second, third, and fourth horizon in depth from the topsoil horizon); all columns with prefix S16 represent OTUs derived from T-RFLP analysis, with the value representing the proportional abundance of that OTU in that sample based on peak height (the sum of these columns equals 1)
