Agricultural Management Practices and Soil Quality Virginia Cooperative Extension Service. A guide for measuring, assessing and comparing laboratory and field test kit indicators of soil quality attributes.
Test My Soil USDA. National Agricultural Library. A collection of links to soil testing handbooks and services for commercial and home growers.
Alternative Soil Testing Laboratories National Center for Appropriate Technology. ATTRA - National Sustainable Agriculture Information Service. Provides information about soil testing laboratories and supplies that meet the special needs of farmers using organic or sustainable production practices.
Understand Soil Testing Results USDA. National Agricultural Library. A collection of links to information about reading, interpreting and using soil test results to manage soil fertility and other conditions.
Soil Quality: More than a Soil Test Purdue University. Core 4. Provides an overview of soil topics including soil quality assessment, soil biological characteristics, soil physical characteristics and soil chemical characteristics.
