USDA World Soil Resources - Natural Resources Conservation System -Soil Taxonomy and Soil Education

Soil and Fertilizer links - Very useful list from North Carolina State University

Soil Fertility Management - From Penn State

TERRA - Revista de la Sociedad Mexicana de la Ciencia del Suelo

Fundamentals of Soil Cation Exchange Capacity (CEC) - Purdue University Cooperative Extension Service

Soil Cation Exchange and CEC - A wonderful course about soils from the University of Minnesota

Soil pH: What it Mean - From the State University of NY, College of Environmental Science and Forestry

Nutrient Cycling and Maintaining Soil Fertility - Slides from Ohio State University Extension

Analytical Methods Manual - ECORC Canada

Soil Test Reports - Cation Exchange Capacity (CEC) and the percent base saturation on soil test reports.

FAQ Regarding Soil Testing - Bob Lippert - Clemson University Extension Service, South Carolina, U.S.A.

Soil Biology Primer - USDA - Natural Resources Conservation Service

Microbiology of Agricultural Soils - The European Community IMPACT - Interactions between Microbial inoculants and resident Populations in the rhizosphere of Agronomically important Crops in Typical soils. 

Introduction to Mycorrhizas - CSIRO forestry

Mycorrhiza - University of Florida

Mycorrhiza - From