Huma Pro® Stimulates Rhizophagy Cycle of Microbes to Increase Root Growth, Rutgers Univ. Conducted by: James White, PhD, Rutgers University Huma Gro® Products: Huma Pro® OBJECTIVE The purpose of this research project was to evaluate how humic acids stimulate microbial activity and initiation of the rhizophagy cycle (in which plants cultivate microbes on their roots