DNA extracted from dried, sieved soil with a DNeasy PowerSoil Pro Kit (Qiagen). Libraries prepared with the Oxford Nanopore Native Barcoding Kit SQK-NBD114-96 and sequenced on a PromethION (flow cell P2S-01191-A). Basecalled with Dorado v1.3.1 (model dna_r10.4.1_e8.2_400bps_sup@v5.2.0) with inline demultiplexing and adapter and barcode trimming. Submitted reads are the per-barcode basecalled FASTQ; no length or quality filtering has been applied.