This site from the Wisconsin Department of Employment Relations provides a job description for soil technician with the State of Wisconsin, and it includes duties and qualifications. (2003)

The taxonomic classification of the earthworm is described and its anatomical characteristics.

This comprehensive site explores a number of soil related topics. A glossary of soil terms, formation of soils, and classification of soils are just of a few of the topics found on this this.

Everything you need to know about sedimentary rocks and the processes by which they are created, including weathering, soils, environments, and classification.