By Jamie Martin
Solar grazing is gaining attention as farmers and renewable energy developers look for efficient ways to manage vegetation while creating new agricultural opportunities.
Two recent Cornell University studies highlight how sheep grazing at solar installations can benefit both the environment and farm businesses.
One study examined the impact of different grazing levels on insect populations at a solar farm in New York. Researchers monitored grazing systems for three years and compared them with traditional mowing practices.
The research found that areas grazed by two sheep per hectare supported 38% more beneficial insects than mowed plots. Populations of wild bees, honey bees, and lady beetles all increased under low-density grazing conditions.
Honey bees showed the greatest response, increasing by 83% compared to areas managed through mowing. These insects are essential for pollination and ecosystem health, making their presence valuable for surrounding agricultural landscapes.
“Sheep grazing and beneficial insect habitat are two prominent conversation topics around solar development right now,” said Leana Zoller, the paper’s first author and a postdoctoral associate in natural resources in the Cornell CALS Ashley School of Global Development and the Environment.
She added, “But what’s been missing is research that treats them as parts of the same system. When we talk about sustainable solar development, integrating these discussions into a single framework is really helpful to farmers and community decision makers.”
Scientists also studied higher grazing densities. Medium stocking rates improved vegetation control while maintaining insect populations like those found in mowed areas. The highest grazing rates delivered the strongest vegetation management benefits but reduced honey bee numbers.
Researchers say the results demonstrate that management decisions can influence both environmental and operational outcomes. Selecting an appropriate stocking rate can help balance vegetation control with biodiversity goals.
Solar grazing is an important part of agrivoltaics, a system that combines agricultural production with solar energy generation. By integrating livestock into solar operations, landowners can make productive use of land while reducing maintenance costs.
A second study explored how farmers can better manage sheep flocks used in solar grazing operations. Researchers developed a decision-support model to assist producers with business planning and operational decisions.
The tool helps farmers evaluate flock size, expenses, expected revenues, pasture availability, and vegetation conditions at solar sites. It provides support for purchasing, marketing, and management decisions that affect overall profitability.
Researchers also believe the tool can improve collaboration between solar companies and livestock producers by helping both sides understand operational requirements and long-term goals.
The studies arrive as interest in solar grazing continues to grow across North America. Many sheep producers view solar sites as an attractive option because they offer access to grazing areas and create an additional revenue stream.
Industry leaders note that solar contracts often provide more stable income than traditional grazing arrangements. This added financial security can support investments in barns, fencing, livestock, labor, and farm equipment.
“We zeroed in on stocking rates because that’s a concrete number that sheep farmers understand and work with every day, and we want this research to be useful,” said Steve Grodsky, paper senior author and assistant professor of natural resources in the Ashley School.
He added, “With solar grazing, people, energy, agricultural animals, plants and insects are all part of this ecosystem. We’re trying to understand the connections between those pieces so that when solar developers, municipalities looking at solar development, or farmers are faced with a decision, they can have scientific information about potential trade-offs and synergies.”
The sheep industry may also benefit from increased production. Domestic demand for lamb and wool remains strong, and additional grazing opportunities could encourage more producers to expand their flocks.
Researchers believe solar grazing represents a practical example of how agriculture and renewable energy can work together. The practice helps manage vegetation around solar panels while supporting agricultural activity on the same land.
As solar development continues to expand, these findings provide valuable information for farmers, landowners, and developers seeking productive and sustainable land-use solutions.
The research suggests that well-managed solar grazing can support beneficial insects, strengthen farm economics, and contribute to the long-term growth of rural communities.
Photo Credit: istock-simplycreativephotography
Categories: National