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This video is Session 3 part 3 of our ongoing training on "Introduction to Soil Science." This training gives a broad overview and introduction to some basic soil characteristics: phases (solid, liquid, gas), texture, density, structure, reaction (pH), plant-water relationships, organic matter, and nutrients.

This video discusses the chemical makeup of soil, ions, pH.

Special thanks to Dr. Landon Darilek for giving this presentation at the ECHO Asia Small Farm Resource Center in Chiang Mai, Thailand on 24 July 2020.

Video highlights include:

00:00 Introduction by ECHO Asia Director, Dr. Ed Sabio

03:30 Understanding Ions

13:20 Understanding Cations

15:45 Discussion on the Periodic Table of the Elements

21:20 Understanding Soil Reaction (pH)

34:10 Classifying pH Soils

40:15 Managing Soil pH