4R Plus: Nutrient Management and Conservation for Healthier Soils
By now, most of us in agriculture have been made aware of the “4Rs” Nutrient Stewardship initiative—Right Source, Right Time, Right Rate, and Right Place—developed by The Fertilizer Institute, International Plant Nutrition Institute, Fertilizer Canada, and International Fertilizer Association. The 4Rs program advocates the implementation of best management practices that optimize the efficiency of fertilizer