1. Humic Acid
Humic acid also goes by the name “black.” No matter what you call it, it’s a great thing to add to your soil. It improves soil quality by increasing moisture retention and boosting biological activity under the surface. It’s often called “black” because this is what gives healthy soil its black color. It attaches itself of micro nutrients that roots need to grow, and when taken up by those roots, increases metabolic efficiency in the plant.