If you are one of my students in the total grazing program, this will interest you. You know the importance that I give to humus and how regeneration of soils totally depends on increasing the humus in them.

For more than 100 years, humus has been used to refer to the stable fraction of organic matter that is no longer easy to degrade under the action of microorganisms and is what determines the true fertility of our soils.

Lately, some people have written to me that humus does not exist and that a study done by Lehmann in 2015 proves it, so I started to investigate because 7 years have passed since that discovery and nothing has happened.

So does humus really exist?