Where 4R Nutrient Stewardship Meets Field-Proven Results
The Mid-Atlantic 4R Nutrient Stewardship Association helps farmers and trusted advisors put the 4Rs into practice — the Right Source, at the Right Rate, at the Right Time, and in the Right Place. The result? Stronger yields, healthier waterways, and sustainable farms for generations to come.
A Smarter Way to Farm: Profit, Planet, and People
Nutrient management isn’t one-size-fits-all. Done right, it improves productivity and builds trust between agriculture and the community.
The 4R Principles bring balance to every application:
Profit
Increase efficiency and reduce costs.
Planet
Protect soil health and waterways.
People
Strengthen relationships between farmers and communities.
Simple Steps. Big Impact.
We break nutrient stewardship down into four proven categories:
Right Source
Choose the best nutrient type for each crop.
See It In Action
Right Rate
Apply the right amount for optimal growth.
See It In Action
Right Time
Deliver nutrients when plants can actually use them.
See It In Action
Right Place
Keep nutrients where crops can access them – and out of waterways.
See It In Action
With these steps, farmers see stronger results while protecting the environment.
Leading the Way in 4R Nutrient Stewardship
The Mid-Atlantic 4R Nutrient Stewardship Association is a non-profit collaboration of the Delaware-Maryland 4R Alliance and the Pennsylvania 4R Alliance.
Our mission is simple:
- Empower trusted advisors to lead farmers in adopting 4R practices.
- Deliver real-world proof through demonstration projects.
- Collect and share data that shows the benefits of 4R adoption.
When you work with us, you don’t get red tape — you get direct guidance, easy enrollment, and even funding support to help put the 4Rs into practice.
Our Impact Across the Mid-Atlantic
Since 2017, MA4R and its state alliances have helped farmers, advisors, agribusinesses, and conservation partners put practical, science-based nutrient stewardship into action across Delaware, Maryland, and Pennsylvania.
Secured for 4R Education & Implementation
Acres Influenced by 4R Practices
Farmers Reached Through Education & Outreach
Farmers Supported Through 4R Benchmarking
4R Vouchers Supporting New 4R Practice & Adoption
Practical Support for Farmers and Advisors
Every farm is different. That’s why our programs focus on providing:
- Region-specific resources tailored to Mid-Atlantic conditions.
- Incentive programs to encourage adoption of 4R practices.
- Ongoing support so you’re never left figuring it out alone.
Joining is simple: we announce a program, you enroll with straightforward paperwork, and we stay connected all season long.
Upcoming Events
Mid-Shore Grain Marketing Breakfast
August 4th, 2026
Start your morning with timely insights into the grain markets at the Mid-Shore Grain Marketing Breakfast, hosted by University of Maryland Extension. This educational program is designed for farmers, grain producers, and agricultural professionals looking to better understand current market conditions and prepare for the upcoming harvest season.
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Carvel Open House & Crop Tours
August 6th, 2026
The University of Delaware’s Carvel Research and Education Center in Georgetown opens its fields to the agriculture community on Thursday, August 6. This year’s expanded event adds six crop-specific mini tours, main-tent speaker presentations, expanded poultry education, and a general farm research overview tour.
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Penn State Ag Progress Days
August 11th - 13th, 2026
Penn State Ag Progress Days is Pennsylvania’s largest outdoor agricultural exposition, bringing together farmers, researchers, agribusinesses, educators, and industry professionals for three days of innovation, education, and networking.
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Recent News
2025 Summer Voucher Findings
July 29, 2026
One way, MA4R has been moving the needle, is through the use of 4R Vouchers. These vouchers are good for $1,000 worth of nutrient data management or advanced nutrient management planning. Funds go directly to a trusted advisor to assist a farmer for free or at a reduced cost. The purpose of the voucher allows any farm, no matter the size or level of 4R implementation, to organize their data or plan out how to utilize an advanced nutrient management practice for their business and showcase how the practice would benefit their farming operation.
Mid-Atlantic 4R’s Launches a New Website
July 24, 2026
Mid-Atlantic 4R Nutrient Stewardship Association is very excited to share, they have recently completed a new updated website! Check out 4rmidatlantic.com to see our updated website, learn about current funding opportunities, and meet all those who work together to make for a successful program.
4Rs Collaborate with Hoover Manure Expo
July 10, 2026
Join Mid-Atlantic 4R Nutrient Stewardship Association and Pennsylvania 4R Alliance at Hoover’s Manure Expo set on July 27, 2026.
Join Our Growing Network of Farmers & Advisors
Don’t miss program announcements, funding opportunities, and practical resources for nutrient stewardship in the Mid-Atlantic. Our email list keeps you connected: simple, direct, and always relevant.
What Our Partners Are Saying
Real results, real people. Hear from farmers and advisors who have seen
firsthand how simple steps with the 4Rs can make a big difference:
Variable rate technology has helped us utilize the same amount of fertilizer and seed and realize higher yields.
Just throwing money at a problem never fixes the problem, and that's probably my biggest beef with everything that involves the [Chesapeake] Bay. […] But if we come to [farmers] with solutions like [the Mid-Atlantic voucher program], you know that fix the [environmental] problem, but still make [farmers] more money, I mean, it’s a game changer.
Even when we voluntarily compiled nutrient management plans, we found we didn’t need all the nutrients we were applying. We’ve gotten better since.
Better balancing of dairy manure has enabled use across more acres in accordance with balanced crop needs and has significantly reduced nutrient imports to the farm.
[Precision management] stuff doesn't really interest Dad because he never did it […] I've been kind of throwing it around, and then [my advisor] mentioned the [voucher] program. I was like, "Well, hey, here's a good time to see once what we think of it!
This voucher, if it's an initiative to get something set up, get a good program going, we're going to be saving fertilizer, seed. It all should be making our acres more profitable, so for an initiative to get things going, I think it's a great program.
Bring 4R Stewardship Home to Your Farm
The 4Rs are more than principles — they’re a proven pathway to higher efficiency, healthier land, and stronger communities.
Whether you’re a farmer, advisor, or part of the environmental community, you can take the next step today.