It’s been 11 years since the 4R Plant Nutrition manual was published, setting out a framework for the stewardship of plant nutrients agreed to by soil fertility scientists and crop nutrition practitioners.  This episode delves into the fascinating history behind the 4Rs of Nutrient Stewardship, a groundbreaking framework created by The Fertilizer Institute with the invaluable expertise of Paul Fixen and our own Directory of Agronomic Services, Rob Mikkelsen.   Paul Fixen is retired from serving as Senior Vice President of the International Plant Nutrition Institute where his responsibilities included coordination of the Institute's global research efforts.  Dr. Fixen also served as the 2016 President of the American Society of Agronomy (ASA), the largest agronomic professional and scientific society in the world.   Get the manual, "4R Plant Nutrition: A Manual for Improving the Management of Plant Nutrition" "Furthering 4R Nutrient Stewardship" article we discussed. "A Brief Accont of the Genesis of 4R Nutrient Stewardship"