The Science Behind the 4Rs of Nutrient Stewardship

The Science Behind the 4Rs of Nutrient Stewardship

The 4Rs of nutrient stewardship—Right Source, Right Rate, Right Time, and Right Place—are more than guiding principles. They’re grounded in decades of agronomic research showing how nutrients move through soil, crops, and water systems. At their core, the 4Rs provide...
Nominate a 4R Advocate in the Mid-Atlantic

Nominate a 4R Advocate in the Mid-Atlantic

Highlight a 4R Farmer and Crop Consultant Today Chester, Maryland – October 2, 2025 – The Mid-Atlantic 4R Nutrient Stewardship Association (MA4R) is seeking nominations for a 4R Advocate in their region. The 4R Advocate Program recognizes agricultural...