Why is Soil Organic Matter (SOM) Important? (Intro to Soil Science Part 4)
Why is organic matter important? What causes biological degradation? How can I assess my soil biology and how can I improve it?
This training is the 4th in a series discussing soil science. This series of lectures and practical demonstrations 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.
After this lecture we went head out to into the ECHO Farm to look at cover crops being grown on the farm as well as how to set a pitfall trap to assess insect life in the soil.
Special thanks to Dr. Landon Darilek for giving this presentation at the ECHO Asia Small Farm Resource Center in Chiang Mai, Thailand on 11 September 2020.
00:00 Welcome from Dr. Ed Sabio, ECHO Asia Regional Director
04:45 Introduction and Review from Dr. Landon Darilek
12:40 Introduction to Soil Organic Matter (SOM)
17:55 Categories of SOM
23:40 Soil Biomass- What is living in 1 teaspoon of soil?
35:30 Sources of Organic Matter (OM)
39:55 Carbon:Nitrogen Ratio
47:50 Functions of OM in soil
50:20 Factors affecting SOM levels
52:27 SOM Issues, Assessment & Technical Interventions
53:05 Ways to assess soil biological health
1:09:00 Ways to maintain SOM levels