Yucca is a rich source of steroidal saponins, whose extract works as a natural surfactant and wetting agent. Surfactants increase uniform water penetration, soil permeability and structure. The saponins and complex carbohydrates in yucca extracts are gentle on roots and friendly to micro-organisms. Biologic Systems Yucca Drench can be added to fertilizers, micronutrients supplements, and organics to increase spreadability and add additional protection against drought, heat, salt, and UV stress.