Resources

Soil survey links

• United States SoilWeb (UC Davis): http://casoilresource.lawr.ucdavis.edu/soilweb/
• Soils of Canada: https://www.agr.gc.ca/atlas/
• Australian Soil Resource Information System: https://www.asris.csiro.au
• United Kingdom Soil Observatory: http://www.ukso.org
• Topsoil physical properties for Europe: https://esdac.jrc.ec.europa.eu/content/topsoil-physical-properties-europe-based-lucas-topsoil-data
• The digital soil map for New Zealand: https://smap.landcareresearch.co.nz

The USDA soil usage classifications are defined here: Soil Classification Definitions

The USDA database may also be accessed here: http://websoilsurvey.nrcs.usda.gov:/app/HomePage.htm

• USGS maps of mineral and geochemical concentrations in the continental US here: https://pubs.usgs.gov/sir/2017/5118/index.html

The Intelligent Gardener: Growing Nutrient Dense Food
by Steve Solomon (Author) , Erica Reinheimer (Author)
Publisher: New Society Publishers

Reviews of “The Intelligent Gardener: Growing Nutrient Dense Food”

• Permaculture Magazine
• Gary Kline at Black Lake Organic

Manual worksheets from The Intelligent Gardener

Additional Resources

• Soils Revealed Global map of soil carbon over time
• Phosphorus testing discussion by the NRCS