Who was Dr. Walter Hale Gardner? If you ever used one of those devices to measure soil moisture content, then you’ve indirectly met Dr. Gardner. He had many scientific accomplishments in the field of soil science, but he may by best known for his time-lapse movie shwoing how water moves through soil. Turf Republic’s article on Gardner by Dr, Mike Fidanza, has both the original groundbreaking film from 1959 and this updated version: