Rajnish Khanna, Ph.D., Brigid McNally, M.A., Elijah C. Mehlferber, Ph.D. Candidate, Kent F. McCue, Ph.D., Britt Koskella, Ph.D., Jon E. Ferrel, M.S., M.B.A. Key Words: Soil health, volcanic ash, microbiome, micronutrients, tomato FOREWORD by Rajnish Khanna, Founder & CEO, i-Cultiver Why is it important to examine how soil amendments effect soil and plant associated microbial communities? Microbes play…