Jabarkan Pambantuakan tanah (pedogenesis) dari Tanah dalam bahasa minangkabau

Short video explaining soil basics

The Soil Water Compendium (soil water content sensors explained)

World Reference Base for Soil Resources

ISRIC – World Soil Information (ICSU World Data Centre for Soils)

World Soil Library and Maps

Wossac the world soil survey archive and catalogue

Canadian Society of Soil Science

Soil Science Society of America

National Soil Resources Institute UK

Plant and Soil Sciences eLibrary

Copies of the reference 'Soil: The Yearbook of Agriculture 1957' in multiple formats