The one crucial difference between soil organic matter testing and OM246 tests

Soil organic matter is an important measurement. But did you know that before a soil sample is tested for soil organic matter, much of what you might think of as organic matter is removed from the sample and discarded? Soil organic matter is a measurement of the relatively stable fraction of the soil organic matter. The humus, basically. Any undecomposed living and dead plant material, any roots and rhizomes and underground stems and mat and thatch—those are all removed from…