Harold Reetz

Harold F. Reetz Jr. (1948 to 2022) was an American agronomist, born at Watseka, Illinois, who grew up on a dairy and grain farm. After a BS at the University of Illinois in 1970 he took his MS and PhD at Purdue University in crop physiology and ecology. He was an extension and research specialist in corn production for Indiana in the Purdue Agronomy Department from 1974 to 1982, then joined the Potash & Phosphate Institute, became President of the Foundation for Agronomic Research in 2004 and moved to the International Plant Nutrition Institute in 2007, retiring from it in 2010 to form Reetz Agronomics. He was a leader in the Certified Crop Adviser program, an originator of the Information Agriculture Conference series from 1995, and known for encouraging high yield crop and soil management with remote sensing, geographic information systems and site-specific management. In 2016 he published the book Fertilizers and their Efficient Use.