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Agricultural industry

Organic Grain Farming Strategies Enhance Sustainability

Strategic Insights

— 1 min read

Researchers at the University of Tennessee have investigated the potential of various organic grain farming strategies to promote agricultural sustainability. The study, conducted with financial support from the USDA NIFA Organic Transitions Program, examined the impact of four different organic grain cropping systems on cover crop biomass, grain yield, and weed suppression over a 3-year transition period. The findings suggest that certain systems, such as the sustainable yield system (SYS), can achieve high levels of cover crop biomass and weed suppression without compromising grain yield, indicating a promising approach to reducing tillage intensity in organic grain farming.

Key Takeaways:

  • The study evaluated four organic grain cropping systems: maximum yield system (MYS), sustainable yield system (SYS), ecologically conscious system (ECS), and low input system (LIS).
  • The MYS and SYS treatments achieved the highest cover crop biomass (7-12 Mg ha-1 Year-1) and weed suppression, while LIS had the lowest biomass (0-6 Mg ha-1 Year-1) and highest weed pressure.
  • The fiscally supported treatments (MYS, SYS, and ECS) consistently produced satisfactory yields, with Year 3 averages of 4.66 Mg ha-1 for corn, 2.47 Mg ha-1 for full-season soybean, 4.06 Mg ha-1 for wheat, and 1.5 Mg ha-1 for double-crop soybeans.
  • The agronomic outcomes (biomass and grain yield) of less-tilled SYS and ECS were on par with the most-tilled MYS system.
  • The research highlights the potential for reducing tillage intensity in organic grain farming without compromising agronomic outcomes in the southeastern United States.

Statistics:

  • Cover crop biomass: MYS and SYS achieved 7-12 Mg ha-1 Year-1, while LIS achieved 0-6 Mg ha-1 Year-1.
  • Weed suppression: MYS and SYS achieved high levels of weed suppression, while LIS had the highest weed pressure.
  • Grain yields: Year 3 averages for MYS, SYS, and ECS were 4.66 Mg ha-1 for corn, 2.47 Mg ha-1 for full-season soybean, 4.06 Mg ha-1 for wheat, and 1.5 Mg ha-1 for double-crop soybeans.

Sources:

  • Agronomic Responses of Transitioning Organic Grain Rotations Employing Multi-tactic Tillage and Cover Cropping Strategies. Agronomy Journal, 2025;117(3).
  • USDA NIFA Organic Transitions Program.
  • University of Tennessee, Dept. of Biosystems Engineering and Soil Sciences, Knoxville, TN 37996, United States.

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