Soil formation in one picture. nostr:nevent1qgsgsea7mylgnjfapk9vnzeyg0z423ueaku3jq6xj3439cplzdnyg5qpzemhxue69uhhyetvv9ujuerfw36x7tnsw43z7qpqqqqxejrr4kpqm85t3xj8dk9tlfjz6fav5z26egdjjmekdjgvv42qcxet2u