• Soil
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California Soil Resource Laboratory
 


UK: United Kingdom soil classification system
Project Soil
Advanced Soil Genesis: Soil Morphology and Classification
Australian Soil Resource Information System (ASRIS)
Handy Geotechnical Instruments, Inc.
Aquaflex
Soil Physics and Soil Hydrology Program
EarthWorks Soil Amendments, Inc.
JMC Soil Samplers
 
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