At McGill University’s Emile A. Lods Agronomy Research Farm in Ste-Anne-de-Bellevue, rows of Kernza sway beside alternating strips of wheat and red clover—quiet experiments in resilience that could reshape how we grow food in a climate-stressed world. A new study led by Deniz Dutton, now a rising voice in sustainable agriculture, reveals that two simple shifts—growing multiple crops together and replacing annual wheat with perennial Kernza—can significantly strengthen soil health even under simulated drought conditions. As climate change brings more erratic rainfall, the findings offer tangible hope: farming systems can adapt, and even regenerate, under pressure.
Soil is not just dirt—it’s a living web of microbes that support plant growth, store carbon, and buffer against extreme weather. Yet industrial agriculture, with its reliance on monocultures and heavy inputs, has degraded these vital communities. Dutton’s research, published in Applied Soil Ecology, tested whether ecological alternatives could reverse this trend. At the heart of the experiment were two interventions: intercropping annual wheat with red clover in alternating rows, and replacing wheat entirely with Kernza, a deep-rooted perennial grain gaining attention for its environmental benefits.
The results were striking. Both approaches boosted the presence of arbuscular mycorrhizal fungi—beneficial symbionts that help plants absorb nutrients and water. These fungi increased by measurable levels in both the intercropped and perennial systems, and the overall structure of microbial communities became more complex and resilient. Perhaps most importantly, greater crop diversity led to greater variability in microbial function across space—a trait the researchers believe could help soils adapt to unpredictable climate shifts. "We found that both intercropping and replacing the annual wheat with the perennial grain ... increased the abundance of a beneficial fungal symbiont," Dutton said, underscoring the biological foundation of soil resilience.
To simulate climate stress, the team used rain shelters to reduce precipitation by 30% in some plots while redirecting that water to others, creating a controlled precipitation gradient. Despite these challenges, the diversified systems maintained stronger microbial activity. DNA analysis confirmed that microbial communities in perennial and intercropped plots were not only more robust but also more spatially variable—meaning they could potentially respond more flexibly to future environmental changes.
This work taps into a broader shift in agriculture—one that looks not to technology alone, but to ecological wisdom long practiced before the rise of industrial farming. Dutton points out that diversified and perennial systems were once common, used to prevent crop failure and restore soil fertility. Now, they’re being reexamined as tools for climate adaptation. While Kernza remains a niche crop, with a distinct, nutty flavor used in specialty breads and craft beer, its potential extends far beyond the bakery. As weather extremes intensify, the quiet hum of microbial life beneath these experimental plots may hold the key to a more resilient food future.