Links in this category of editors choices cover some of these topics:
soil, erosion, biology, chemistry, physics, quality, salinity, acid sulphate

• Australian Geological Survey Organisation (AGSO) [aus]
• National Landcare Program (NLP) [aus]
• Manaaki Whenua - Landcare Research [nz]
• Commonwealth Scientific and Industrial Research Organisation (CSIRO) [aus]
• Permaculture Research Institute [aus]
• CSIRO Land and Water [aus]
• CRC for Soil and Land Management [aus]
• NSW Environment Protection Authority (EPA) [nsw]
• Australian Society of Soil Science Incorporated (ASSSI) [aus]
• Department of Lands, Planning and Environment (DLPE) [nt]
• National Land and Water Resources Audit (NLWRA) [aus]
  • comprehensive national appraisal of Australia's natural resource base, framework for natural resource management decision making
• Native Nursery [aus, vic]
  • comprehensive directory of subjects related to native Australian flora and the environment, species list, Native CD-ROM, book shop, online ordering, message board
• Canberra Organic Growers Society (COGS) - Worms [aus]
• Australian Vermiculture Resources Guide [aus]
• Reln Plastics - Home Composting [aus]
• Nature Conservation Council of NSW (NCC) [nsw]
  • peak umbrella organisation for community, conservation and environment groups, excellent search facility, links wide range environmental groups
• Canberra Organic Growers Society Australia (COGS) [act, aus]
  • links to many relevant organic WWW sites

Region codes [aus, nz, ant, ...] indicate the state or country that each site is relevant to.