Partner Pulse: The Fertilizer Institute highlights 4R farmer case studies June 23rd 2025 Dr. Leanna Leverich Nigon Director of agronomy and research The Fertilizer Institute Through the 4R Advocate Program, The Fertilizer Institute celebrate leaders in agriculture who bring the principle of sustainable fertilizer management to life on their farms. The organization, a U.S. Farmers & Ranchers in Action partner, is highlighting two case studies showing the impact of 4R Nutrient Stewardship b...