Advancing 4R Nutrient Stewardship Across Delaware & Maryland
A Collaborative Approach to Farming & Conservation in Delaware and Maryland
Founded in 2015 by The Nature Conservancy and the Delaware-Maryland Agribusiness Association, the Delaware-Maryland 4R Alliance (formerly the Chesapeake 4R Alliance) works to increase the adoption of nutrient stewardship practices across Delaware and Maryland farms.
Our Mission:
Help farmers apply nutrients efficiently and responsibly while supporting long-term farm productivity and water quality in the Chesapeake Bay region.
Recognizing the People Who Make DEMD4R Work
Practical Solutions for Delaware & Maryland Farmers
The Alliance focuses on:
- Increasing productivity and profitability for Delaware and Maryland farms.
- Hosting 4R workshops and field days to connect farmers and advisors.
- Supporting on-farm demonstrations for variable-rate nitrogen management and nutrient modeling.
- Building partnerships through conservation programs like RCPP, CSP, EQIP, and WRE.
Turning 4R Principles Into Regional Results
Since 2015, the Delaware-Maryland 4R Alliance has:
- Helped farmers manage thousands of acres with conservation practices.
- Launched on-farm demos showing the benefits of precision nutrient management.
- Connected agribusinesses, conservation partners, and farmers through hands-on training events.
Every acre managed with the 4Rs benefits farmers, waterways, and the entire Chesapeake Bay region.
Join the 4R Movement in Delaware & Maryland
Download our handouts on 4R Practices
Learn more about the benefits of membership
Press and News
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 retailers and...
Getting to Know Your Soil
Article Written By: Todd Hunsicker, Growmark FS Following harvest one of the first steps to preparing for the next growing season is soil testing. Without knowing what nutrients are currently in the soil, applications of plant food may be a poor investment for growers...
Advanced Nutrient Management Vouchers Available
"Are you ready to take your farm to the next level for yield and efficiency?" For the upcoming small grains growing season, farmers and trusted advisors in the Chesapeake Bay Watershed have the opportunity to work together and plan advanced nutrient management...
4Rs of Dairy Manure
Successful and informative webinar by Mid-Atlantic 4R Chester, Maryland - June 17, 2025 - The Mid-Atlantic 4R Nutrient Stewardship Association held an hour-long webinar covering the 4Rs - Right Source, Right Rate, Right Time, and Right Place - of dairy manure. Robb...
4Rs and Fertility
Wednesday, March 5, 2025 (Chester, Maryland) - Over 130 attendees across the region joined the Mid-Atlantic 4R Nutrient Stewardship Association’s “Testing Efficiency February Webinar” on Monday the 24th. Key takeaways from the audience included: global use of...
Contact Info
📞 Lindsay Thompson | 443-262-8491
📧 lindsay.mdag@gmail.com
📱 Facebook: @DEMD4RAlliance