Agriculture & Farming What is the concept of 4R? June 1, 2026 by Mercier | Leave a Comment The 4R concept, often referred to as 4R stewardship or 4R nutrient management, is a framework for optimizing fertilizer use in agriculture to improve crop yields while minimizing environmental impact. It emphasizes applying the right source of fertilizer, at the right rate, at the right time, and in the right place. This approach helps farmers […] Read more ยป