USDA research suggests diverse crop rotations offer stability

The USDA’s Agricultural Research Service (ARS) has released findings that suggest diverse crop rotations can mitigate risks associated with poor growing conditions, offering a potential lifeline for fruit and vegetable growers grappling with climate change.

Though effective, more diverse rotations may take years to show results, which is why long-term agricultural field experiments are a valuable source of evidence. The DRIVES Network (Diverse Rotations Improve Valuable Ecosystem Services) has combined data from 20 long-term experiments to investigate the impacts of crop diversity across multiple regions and production systems, according to a news release.

“Long-term field experiments are national treasures for capturing dynamics in slow-moving variables like soil characteristics, or responses under erratic conditions, like droughts. Both of these variables are critical to understanding how agricultural systems can adapt to climate change,” Ann Bybee-Finley, agroecology professor for North Carolina State University, said in the release.

 

 

Bybee-Finley began the research while completing her post-doctoral studies at ARS. “The DRIVES Network aims to connect data from long-term experiments with crop rotations across North America and make it available to the public,” she said in the release.

The research highlights that while individual crops, like corn or soybeans, often perform better in diverse rotations, the composition of the entire rotation is crucial for overall success. More diverse rotations proved particularly effective under poor growing conditions, underscoring their potential to reduce crop loss risks in an increasingly unpredictable climate.

“This research adds to the growing evidence that could help remove barriers to sustainable farming,” ARS ecologist Katherine Muller said in the release.

Despite the benefits, many farmers hesitate to adopt diverse rotations due to economic uncertainties, lack of incentives, and the complexities of managing new crops. However, the long-term advantages, including reduced need for fertilizers and pesticides, could outweigh these challenges, the USDA press release noted.

The research, highlighted in this month’s One Earth journal, will continue within ARS and with research partners at North Carolina State University, University of California Berkeley, Rice University, The International Maize and Wheat Improvement Center, University of California Davis, Iowa State University, University of Minnesota, The Pennsylvania State University, The Ohio State University, University of Tennessee, University of Wisconsin – Madison, Michigan State University and University of Guelph.

For more information, visit the ARS website.