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Can Farmer-Led Initiatives Reduce Nonpoint Source Pollution?

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  • Hadachek, Jeffrey
  • Karwowski, Nicole
  • Stevens, Andrew

Abstract

Nonpoint source pollution from agriculture is the leading cause of nutrient pollution in the US. This paper addresses whether localized, farmer-led programs can cost-effectively reduce nonpoint source pollution by increasing the adoption of agricultural conservation practices. We study this in the context of an innovative program in Wisconsin that incentivizes farmers to take collective leadership of improving water quality in their local watersheds. Using a shift-share instrumental variables design, we find that a 10 percentage point increase in farmer participation in these programs leads to a 0.03 mg/L reduction (14%) in ambient phosphorus concentrations in local streams and rivers. We also show that this change causes an increase in the adoption of cover crops, conservation tillage, and more diverse crop rotations. Importantly, this localized approach achieves water quality and conservation improvements at a substantially lower cost than existing federal subsidy programs, demonstrating the potential for bottom-up approaches to address nonpoint source pollution in other contexts.

Suggested Citation

  • Hadachek, Jeffrey & Karwowski, Nicole & Stevens, Andrew, 2025. "Can Farmer-Led Initiatives Reduce Nonpoint Source Pollution?," 2025 AAEA & WAEA Joint Annual Meeting, July 27-29, 2025, Denver, CO 360770, Agricultural and Applied Economics Association.
    • Handle: RePEc:ags:aaea25:360770
    DOI: 10.22004/ag.econ.360770
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