Soil organic matter is considered an indicator of soil health, there are numerous methods promoted for building it, SOM is credited with the potential to alleviate greenhouse gas increase, but Andy & Doug say the way we've understood SOM is perhaps an artifact of the old ways of measuring it. The complexity of what we call 'organic matter' is significant, challenging, and prompts a re-thinking of both soil health measurement and soil-building practices. This episode is not quite "Why Everything You Thought You Knew About Soil Organic Matter is Wrong", but advances in soil biology and chemistry will certainly challenge your long-held notions about this topic. If you haven't heard part 1 of this interview with Doug Collins and Andy McGuire, go to episode 74.

Related resources:

WSU Extension publication by Doug & Andy, "Understanding and Measuring Organic Matter in Soil" can be downloaded at https://pubs.extension.wsu.edu/understanding-and-measuring-organic-matter-in-soil.

Recent article at the website BioCycle, referencing Collins' and McGuire's work: "Saying Goodbye to a Soil Organic Matter Fundamental", www.biocycle.net/connections-sayi…ter-fundamental/