John A. Slipher

John A. Slipher spent over 37 years in agronomy work in Ohio. As an extension soil conservationist he exerted a profound effect on soil improvement in the state. One of his best-known works was the soil productivity balance sheet. He was the co-author of the "Manual of Soil Physics" and of "The Soil, Our Heritage." He is a life member in the National Society of Agricultural Engineers and in 1969 became a member of The Ohio Conservation Hall of Fame.