United States

The Fertilizer Institute (TFI) is the leading voice in the fertilizer industry, representing the public policy, communication and statistical needs of producers, manufacturers, retailers and transporters of fertilizer.

The fertilizer industry endorses a best management practice concept known as 4R Nutrient Stewardship. The 4R philosophy is an innovative and science-based approach that enhances environmental protection, expands production, increases farmer profitability and improves sustainability. The concept is to use the right fertilizer source, at the right rate, at the right time, with the right placement.

Long-term environmental improvement is attainable through responsible commitment through the 4R Nutrient Stewardship Certification Program. The 4R Nutrient Stewardship Certification Program was created to: maximize crop uptake of nutrients and minimize nutrient loss, create long-term positive impacts on water bodies associated with agricultural production areas, encourage sharing of the most up-to-date information about responsible nutrient stewardship with Nutrient Service Providers and growers, and help the agriculture sector adapt to new research and technology in the area of nutrient stewardship.

To get involved with nutrient stewardship initiatives in the United States, please visit or