For years, the conventional wisdom has been simple: more grazing means more damage. But new research out of Alpine is turning that idea on its head—and offering a more complicated, and more useful, reality for ranchers across the Trans-Pecos.
Scientists with the Borderlands Research Institute at Sul Ross State University have been studying how grazing actually works on the ground—not in theory, but across thousands of acres of working rangeland at the Dixon Water Foundation’s Mimms Unit near Marfa. What they’re finding is less about right versus wrong, and more about timing, soil, and something no rancher can control: rain.
The land doesn’t respond the same everywhere
One of the most striking takeaways from the research is how differently the land behaves depending on what’s under your boots.
On deeper, moisture-holding Marfa clay soils, it didn’t matter much whether cattle were rotated or grazed continuously—grass production stayed largely the same. The land, with its ability to hold water, buffered the impact.
But on shallower Musquiz soils, the story changed. Continuous grazing didn’t degrade the land as expected. In some cases, it actually increased vegetation cover and improved soil moisture—challenging one of the most common assumptions in range management.
Drought is still in charge
If there’s a villain in this story, it isn’t cattle. It’s drought.
When rainfall dropped from about 10 inches in 2023 to roughly 3 inches in 2024, forage production was cut in half. Across all grazing systems—rotational, continuous, or no grazing at all—the same reality set in: without water, nothing grows.
In those conditions, the differences between grazing strategies begin to fade. Plants aren’t struggling because of cows. They’re struggling because they don’t have the moisture to come back.
Grazing isn’t just tolerated—it can help
The research also delivers a finding that may surprise critics of grazing: land that was completely rested from livestock for more than a decade often had lower plant diversity than land that was grazed.
Moderate grazing, when managed well, appears to stimulate regrowth, prevent any single species from taking over, and create a more varied, resilient landscape. In some cases, it even helped retain soil moisture by reducing plant density and limiting water loss.
In other words, grazing isn’t just something the land can survive—it can be part of what keeps it healthy.
No silver bullet for ranchers
For ranchers in the Trans-Pecos, the takeaway isn’t a new rule—it’s the absence of one.
There is no perfect grazing system.
Rotational grazing works well in some conditions. Continuous grazing works in others. And in dry years, neither can overcome the limits of a sky that won’t deliver rain.
What matters most is flexibility: adjusting stocking rates, watching the land closely, and understanding how soil and moisture interact on a given piece of ground.
Research rooted in real ranchland
That’s what makes this work out of Alpine matter. The Borderlands Research Institute isn’t studying grazing in a lab—it’s studying it where it actually happens, on working ranches in the Chihuahuan Desert.
By pairing real-world conditions with long-term data, researchers are helping answer a question that doesn’t have a simple answer: how do you make a living off the land without wearing it out?
The answer, it turns out, isn’t about removing cattle. It’s about understanding the land well enough to work with it.
And in West Texas, that starts with knowing that sometimes, the biggest factor isn’t what’s grazing—it’s whether it rains at all.
