Empowering Advisors.
Supporting Farmers.
Protecting Our Future.
The Mid-Atlantic 4R Nutrient Stewardship Association is a nonprofit dedicated to advancing the 4R Principles of nutrient management — the Right Source, at the Right Rate, at the Right Time, and in the Right Place.
Through collaboration, education, and real-world demonstration projects, we help farmers, trusted advisors, and the environmental community bring nutrient stewardship practices to life across the Mid-Atlantic.
Leading the Way in Nutrient Efficiency Across the Mid-Atlantic
Agriculture in our region faces complex challenges: balancing farm productivity with water quality, protecting soil health while staying profitable, and earning community trust. That’s where MA4R comes in.
Through our regional affiliates, we fulfill our mission to:
- Deliver real-world proof through demonstration projects.
- Provide resources and funding opportunities to encourage adoption.
- Collect and share data that shows how farmers benefit — and how the environment does too.
- Educate farmers on the economic and environmental benefits of 4R practices — accelerating progress toward clean water and habitat goals.
- Communicate to non-agricultural audiences by documenting on-farm successes and sharing outcomes that matter to communities across the Mid-Atlantic.
By connecting agriculture with the public, we strengthen trust, demonstrate accountability, and show how nutrient efficiency benefits everyone — from the farm gate to the Chesapeake Bay.
Our Work is Rooted In:
Approachability
Making 4R adoption simple and practical.
Impact
Every program is designed to deliver measurable results.
Service
Supporting advisors and farmers with tools and resources that work in the field.
The People Behind Mid-Atlantic 4R
Jenell McHenry
Executive Director
Jenell leads MA4R with a focus on relationship-building, practical support, and program delivery. She works directly with advisors and farmers to ensure 4R practices are easy to adopt, impactful in the field, and beneficial for both farm operations and the environment
Jenell also serves as a voice for 4R adoption within conservation and agricultural networks, helping strengthen communication and collaboration across the region’s farming community.
Ben Hushon
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Vice Chair
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Lindsay Thompson
Treasurer
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Adam Herges
Secretary
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Kristen Fisher
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Chris Metz
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Eric Rosenbaum
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An Industry-Led Partnership Driving Regional Solutions
As an industry-led partnership for regional-scale program delivery, the Mid-Atlantic 4R Nutrient Stewardship Association serves as the umbrella organization for local 4R efforts in the Mid-Atlantic.
Each of our affiliates is working to promote practical, community-based solutions that:
- Support farmers with real-world strategies for nutrient efficiency.
- Empower trusted advisors to lead the adoption of 4R practices.
- Strengthen environmental outcomes for the Chesapeake Bay and beyond.
Together, these efforts add up to a stronger agricultural system built on progress, innovation, and shared responsibility across the region.
Delaware-Maryland 4R Alliance
Pennsylvania 4R Alliance
The PA 4R’s Mission: Collectively work with farmers to deliver science-based systems that improve crop productivity through increased nutrient use efficiency and reduce losses of nutrients to the environment.
Join the 4R Community
Whether you’re a farmer, trusted advisor, or part of the environmental community, you have a role in this movement. Take the next step and be part of a growing network working toward better yields, cleaner waterways, and stronger communities.