U.S. Funded Projects
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Keep Fertilizer on the Farm: Using the 4R Framework to Support Sustainable Nutrient Management in the Northern Great Plains
University of Minnesota
Keep Fertilizer on the Farm: Using the 4R Framework to Support Sustainable Nutrient Management in the Northern Great Plains
University of Minnesota
Crops:
Corn for grain, Corn for silage
4R Principle:
Source, Rate, Time, Place
Stacking and Intersecting Nutrient And Irrigation 4Rs
Utah State University
Stacking and Intersecting Nutrient And Irrigation 4Rs
Utah State University
Crops:
Alfalfa, Apples, Barley, Beans (dry), Canola, Hops, Potato, Tart cherry, Winter wheat, Wheat
4R Principle:
Source, Rate, Time, Place
Determine Benefits of 4R Nutrient Management and Conservation Practices On Water Quality and Use Efficiency via the Arkansas Discovery Farm Program: A Collective Learning Experience
University of Arkansas
Determine Benefits of 4R Nutrient Management and Conservation Practices On Water Quality and Use Efficiency via the Arkansas Discovery Farm Program: A Collective Learning Experience
University of Arkansas
Crops:
Cotton, Rice
4R Principle:
Source, Rate, Time, Place
Nitrate-sensitive salinity management: An advanced 4R practice to optimize nutrient and water uptake under microirrigation
University of California-Davis
Nitrate-sensitive salinity management: An advanced 4R practice to optimize nutrient and water uptake under microirrigation
University of California-Davis
Crops:
Almonds
4R Principle:
Time, Place
An Integrated Approach for Nitrogen Management In Upland Cotton Across The U.S. Cotton Belt
Virginia Tech
An Integrated Approach for Nitrogen Management In Upland Cotton Across The U.S. Cotton Belt
Virginia Tech
Crops:
Cotton
4R Principle:
Source, Rate, Time, Place
Spatial and Temporal N Management for Irrigated Vegetable Production Systems
University of Arizona
Spatial and Temporal N Management for Irrigated Vegetable Production Systems
University of Arizona
Crops:
Apples, Broccoli, Cauliflower, Celery, Lettuce
4R Principle:
Rate, Time, Place
Coordinated Site Network for Studying the Impacts of 4R Nutrient Management on Crop Production and Nutrient Loss
Iowa State University
Coordinated Site Network for Studying the Impacts of 4R Nutrient Management on Crop Production and Nutrient Loss
Iowa State University
Crops:
Corn for grain, Corn for silage
4R Principle:
Source, Rate, Time, Place
4R Research Fund Repository
Purdue University
4R Research Fund Repository
Purdue University
Crops:
Alfalfa, Barley, Beans (dry), Canola, Corn for grain, Corn for silage, Cotton, Hay, Hops, Potato, Rice, Rye, Ryegrass, Sorghum, Soybeans, Winter wheat, Wheat
4R Principle:
Metadata Project
Meta-analysis of Phosphorus Fertilizer Placement and Tillage Interaction for Corn and Soybean in the U.S.
Kansas State University
Meta-analysis of Phosphorus Fertilizer Placement and Tillage Interaction for Corn and Soybean in the U.S.
Kansas State University
Crops:
Corn for grain, Corn for silage, Soybeans
4R Principle:
Metadata Project
Minimizing Phosphorus Loss with 4R Nutrient Stewardship and Cover Crops
Kansas State University
Minimizing Phosphorus Loss with 4R Nutrient Stewardship and Cover Crops
Kansas State University
Crops:
Corn for grain, Corn for silage, Soybeans
4R Principle:
Time, Place
Meta-analysis of Enhanced Efficiency Fertilizers in Corn Systems in the Midwest
North Carolina State University
Meta-analysis of Enhanced Efficiency Fertilizers in Corn Systems in the Midwest
North Carolina State University
Crops:
Corn for grain, Corn for silage
4R Principle:
Metadata Project
A “MANAGE”ed Approach to 4R Nutrient Stewardship on Drained Land
University of Illinois
A “MANAGE”ed Approach to 4R Nutrient Stewardship on Drained Land
University of Illinois
Crops:
Canola, Corn for grain, Corn for silage, Cotton, Hay, Potato, Rice, Ryegrass, Sorghum, Soybeans, Sugar beets, Sugarcane, Winter wheat, Wheat
4R Principle:
Metadata Project
Assessing the Effects of Conservation Practices and Fertilizer Application Methods on Nitrogen and Phosphorus Loss from Farm Fields – A Meta-Analysis
University of Toledo
Assessing the Effects of Conservation Practices and Fertilizer Application Methods on Nitrogen and Phosphorus Loss from Farm Fields – A Meta-Analysis
University of Toledo
Crops:
Corn for grain, Corn for silage, Cotton, Hay, Potato, Rice, Rye, Ryegrass, Sorghum, Soybeans, Sugar beets, Sugarcane, Winter wheat, Wheat
4R Principle:
Metadata Project
Relationships of Nitrous Oxide Emissions to Fertilizer Nitrogen Recovery Efficiencies in Rain-fed and Irrigated Corn Production Systems: Data Review
Purdue University
Relationships of Nitrous Oxide Emissions to Fertilizer Nitrogen Recovery Efficiencies in Rain-fed and Irrigated Corn Production Systems: Data Review
Purdue University
Crops:
Corn for grain
4R Principle:
Metadata Project
Relationships of Nitrous Oxide Emissions to Fertilizer Nitrogen Recovery Efficiencies in Rain-fed Corn Systems: Research Foundation Building
Purdue University
Relationships of Nitrous Oxide Emissions to Fertilizer Nitrogen Recovery Efficiencies in Rain-fed Corn Systems: Research Foundation Building
Purdue University
Crops:
Corn for grain
4R Principle:
Rate, Time
Supplemental Late-vegetative N Applications for High-yield Corn: Agronomic, Economic, and Environmental Implications with Modern versus Older Hybrids
Purdue University
Supplemental Late-vegetative N Applications for High-yield Corn: Agronomic, Economic, and Environmental Implications with Modern versus Older Hybrids
Purdue University
Crops:
Corn for grain
4R Principle:
Place
Evaluating the 4R Nutrient Stewardship Concept and Certification Program in the Western Lake Erie Basin
USDA-ARS Soil Drainage Research Unit
Evaluating the 4R Nutrient Stewardship Concept and Certification Program in the Western Lake Erie Basin
USDA-ARS Soil Drainage Research Unit
Crops:
Corn for grain, Corn for silage, Soybeans
4R Principle:
Source, Rate, Time, Place
Nitrogen Losses: Meta-analyses on Fertilizer Management- Results and Recommendations.
Environmental Defense Fund
Nitrogen Losses: Meta-analyses on Fertilizer Management- Results and Recommendations.
Environmental Defense Fund
Crops:
Alfalfa, Almonds, Apples, Barley, Beans (dry), Canola, Citrus, Clover, Corn for grain, Corn for silage, Cotton, Cucumbers, Green beans, Hay, Hazelnuts, Hops, Mustard, Peanuts, Pecans, Potato, Rice, Rye, Ryegrass, Sorghum, Soybeans, Spinach, Strawberries, Sugar beets, Sugarcane, Sweet corn, Tart cherry, Tobacco, Tomato, Winter wheat, Wheat
4R Principle:
Metadata Project
Nitrogen Losses: A Meta‐analysis of 4R Nutrient Management in U.S. Corn‐Based Systems
Environmental Defense Fund
Nitrogen Losses: A Meta‐analysis of 4R Nutrient Management in U.S. Corn‐Based Systems
Environmental Defense Fund
Crops:
Corn for grain
4R Principle:
Metadata Project
Impacts of 4R Nitrogen Management on Crop Production and Nitrate-Nitrogen Loss in Tile Drainage
Iowa State University
Impacts of 4R Nitrogen Management on Crop Production and Nitrate-Nitrogen Loss in Tile Drainage
Iowa State University
Crops:
Corn for grain, Soybeans
4R Principle:
Source, Rate, Time, Place