4R Principles

4R Nutrient Stewardship principles include using the right nutrient source, at the right rate, at the right time, in the right place.

Read more

4R Benefits

4R Nutrient Stewardship looks at decision management in the context of the economic, environmental, and social impacts of a practice. Another way to look at these factors is Profit, Planet & People.

Read more

Resources

Applying the 4R concept on an individual farm involves many interrelated decisions throughout the growing season that are based on environmental conditions, the landowner’s performance objectives and management considerations.

Read more

About Us

The Mid-Atlantic 4R Nutrient Stewardship Association is a non-profit organization whose members include the Delaware-Maryland 4R Alliance and the Pennsylvania 4R Alliance. We provide information and outreach to farmers, ag service providers and others about the benefits of 4R nutrient stewardship, as well as practical guidance on how to implement new management strategies.

Read More

Our Team

Right Source

The right source matches fertilizer type to crop needs, to ensure a balanced supply of essential nutrients, considering both naturally available sources and the characteristics of specific products, in plant available forms.

Right Rate

The right rate matches the amount of fertilizer to crop needs, by assessing and making decisions based on soil nutrient supply and plant demand.

Right Time

The right time makes nutrients available when crops need them, by assessing and making decisions based on the dynamics of crop uptake, soil supply, nutrient loss risks, and field operation logistics.

Right Place

The right place applies and keeps nutrients where crops can use them, by addressing root-soil dynamics and nutrient movement, and manage spatial variability within the field to meet site-specific crop needs and limit potential losses from the field.

Latest News

Cost-Share to Test Products Available

Chester, MD (January 24, 2024) – The Mid-Atlantic 4R Nutrient Stewardship Association is offering cost-share enhanced nutrient management practices. Cost-share of $20 per acre is available for testing biofertilizer products or adding an additional split of nitrogen. Agribusinesses are eligible to receive $500 per farmer for providing technical assistance to the farmer and delivering data […]

Read More

Mid-Atlantic 4R Voucher Program

Queenstown, Maryland (October 20, 2023) – The Mid-Atlantic 4R Nutrient Stewardship Association is honored to administer 30 vouchers to Certified Crop Advisers (CCAs) who partner with farmers in the Chesapeake Bay Watershed. The voucher is good for $1,000 of technical support from a CCA to provide data management, coaching, and advanced nutrient management plan development […]

Read More

What our customer says