If you apply nitrogen on your farm, this video between AEA founder John Kempf and the AEA agronomy team can help with a discussion of humic substances and cation and anion exchange capacity. This is important to understand to prevent nitrogen leaching. For more information on HumaCarb, AEA's humic product that contains the humin fraction visit https://www.advancingecoag.com/ or email [email protected].