Cattle Eat Grass, Grass Feeds Fires, and That Makes Grazing a Wildfire Policy

A cow is a mobile, self-propelled, solar-powered fuel-reduction machine that runs on grass, requires no federal grant, and leaves fertilizer behind. If a government agency invented her, there would be a ribbon cutting, a press release and a program with an acronym. Because she is a cow, and because her owner wears a hat, she is somehow treated as a threat to the range.

I am being playful, but the claim underneath is serious, and it is checkable: where fire runs on grass, the amount of grass matters. Remove fine fuel in the right places at the right times, and fires burn cooler, slower and smaller. That is the case for treating livestock grazing as a tool of wildfire policy, and against pushing ranchers off public land in the name of the environment. Let me build it step by step, and then state where the argument ends.

The Terms: Fine Fuels, Fuel Breaks and Targeted Grazing

Fine fuels are the light, quick-drying vegetation that ignites easily and carries fire across the ground: grasses, forbs and small shrubs. They are the matches of a range fire. Heavy fuels, such as large logs, burn slowly and matter in forests. On rangelands, the fine fuels set the pace.

A fuel break is a strip of land where the vegetation has been reduced or modified so that a fire loses intensity or stops, and so that firefighters have a place to make a stand.

Targeted grazing is livestock grazing applied deliberately, with a plan, at a chosen time and intensity, to achieve a vegetation goal such as reducing fine fuels. It differs from ordinary season-long grazing because the purpose, the timing and the location are set to serve fire management.

Premise One: Fire on the Range Runs on Grass

Start with the physics. A fire needs fuel, heat and oxygen. On a rangeland, the continuous cover of dry grass is the fuel that lets a spark become a front moving at the speed of the wind. A pasture with tall, cured grass will carry a fire for miles. A pasture grazed short will not. The principle is the same one a homeowner follows when he mows the grass around the house.

This is not a fringe idea. Land managers have used intensive early-spring sheep grazing to reduce fuels near Carson City, Nevada, and range scientists study how grazing changes fire behavior. I want to be careful about the claim: the effect depends on conditions, and I will return to the limits. But the basic mechanism, less fuel means less fire, is as old as farming.

Premise Two: Cheatgrass Changed the Rules in the Great Basin

Here is where the argument gets sharp. In the Great Basin, the vast interior of Nevada, Utah, Idaho, Oregon and surrounding country, a grass called cheatgrass (Bromus tectorum) has transformed the landscape. It is an annual grass native to Europe and Asia, first recorded in the United States in the nineteenth century and spread in part as a contaminant in hay, grain and straw. It thrives on disturbed ground.

Cheatgrass matters for fire because of its life cycle. It is an annual that ripens and dries out by early summer, leaving fine fuel across the ground as the fire season begins.

Many ecologists describe a feedback they call a grass-fire cycle, in which cheatgrass makes fire more likely and fire favors cheatgrass, though the research on how strongly fire alone promotes it is mixed. The sagebrush steppe is habitat for the greater sage-grouse and many other species. When the Fish and Wildlife Service decided in 2015 that the greater sage-grouse did not warrant listing under the Endangered Species Act, wildfire and invasive grasses were among the threats it discussed. Range fire is a conservation problem, not only an economic one.

So the question is practical: what do you do about a landscape carpeted in dry cheatgrass? You can burn it, spray it, reseed it, or you can graze it. Targeted grazing, timed to remove the grass while it is green and palatable in spring, can reduce the fuel load before the season, and cattle are well suited to the job.

Premise Three: The Bureau of Land Management Manages the Range for Use

This is not only a ranchers' wish. The Bureau of Land Management, the federal agency that manages roughly a quarter of a billion acres, much of it Western rangeland, recognizes grazing as a land use on that rangeland, and a fuel break is a place where keeping fine fuels down by grazing can do real work.

The agency's management framework recognizes grazing as a land use alongside others. The Taylor Grazing Act of 1934, sponsored by Representative Edward Taylor of Colorado, established the system of grazing districts and permits on the public rangeland that remained in federal hands. It was a conservation law, passed to end a free-for-all. Before 1934, the open range was a commons that anyone could use, and the predictable result was overgrazing. The act put the range under management: permits, districts, fees, a limit on numbers. The grazing bureau created under the act, later called the Grazing Service, was merged in 1946 with the General Land Office to form the Bureau of Land Management, and the Federal Land Policy and Management Act of 1976 later set out the bureau's multiple-use mandate.

Ecology has a famous name for the problem the Taylor Grazing Act answered. In 1968 the biologist Garrett Hardin wrote an essay in Science called "The Tragedy of the Commons," about herdsmen sharing an open pasture, each gaining by adding one more animal and all losing when the pasture fails. Permits tied to a ranch and a limit on numbers were an early, practical answer to that tragedy. It worked by giving the user a stake: a permit to protect, a range to maintain and a reason to care about its condition.

Premise Four: The Rancher Is a Partner in Fire Prevention

Consider who is on the land. Ranchers with grazing permits work the allotments every year. They know the terrain, the water, the roads and the weather. They are often the first to see a fire start, and they frequently help fight it with their own equipment, water trucks and local knowledge. Rural fire districts are built on that kind of neighbor-to-neighbor cooperation.

A government that sees the permittee as a partner can use that knowledge. A government that sees him as a trespasser throws it away. If the agencies cut permitted use in the name of the environment, or buy out permits and retire allotments, the cattle go and the grass stays. Absent the grazing, the fine fuel accumulates and the next dry summer supplies the spark. Retire the permit, and you may have retired a fuel-reduction crew.

The Critics' Case, Stated Fairly

The opposing case has real force, and an honest argument has to meet it. Here it is at its strongest.

1. Overgrazing damages the land. Too many animals, kept too long on the same ground, strip the vegetation, compact the soil and favor weeds over native plants. The history of the open range proves it. A policy that promotes grazing could repeat the mistake.
2. Cattle damage streams and riparian areas. Animals gather at water. Trampled banks, muddy water and the loss of streamside vegetation harm fish and the wildlife that depend on healthy riparian zones. In arid country, those green corridors are the most valuable habitat there is.
3. Grazing can spread cheatgrass. Heavy grazing in the wrong season can weaken the native perennial grasses that compete with cheatgrass, and livestock can carry seeds. The same cow that eats the fuel can help spread the weed.
4. Grazing does not stop big fires. In extreme conditions, with high wind, heat and drought, a fire can burn through grazed ground. Anyone who claims cattle prevent catastrophic wildfires is overselling.
5. Public land is held for all Americans. Ranchers who graze it pay fees that critics say are below what private grazing costs, and the public may reasonably ask for the land to serve other goals.

The Answer, Point by Point

I accept the premises of several of these and answer the conclusions.

On overgrazing. The danger is real, and it is why the argument is for well-managed, targeted grazing and not for unlimited grazing. Management, not abolition, is the answer. The Taylor Grazing Act exists because the alternative, no management, produced overgrazing. Modern practice uses rotation, rest periods, stocking rates matched to forage, and monitoring. A permit that is enforced and an allotment that is monitored protect the land better than a ranch sold to a developer or an abandoned allotment left to cheatgrass.

On streams. The answer is fencing, off-stream water, rotation and riparian pastures: the standard tools of range management. Keeping cattle out of the creek is a solved problem, and a rancher with a stake in the permit has every reason to follow it, because a violation can cost him the allotment.

On cheatgrass spread. Timing and intensity matter, which is exactly why this is a managed tool. Grazing a stand in spring, when cheatgrass is green and the cattle will eat it, is different from heavy grazing in the fall that stresses native grasses. The evidence supports the proposition that the right grazing helps and the wrong grazing hurts. That is a reason to do it carefully, not to ban it.

On extreme fires. Agreed. No one should claim that cattle stop a wind-driven firestorm. The claim is narrower and still valuable: grazing reduces fire starts' ability to spread under ordinary conditions, helps build fuel breaks that give firefighters a place to hold the line, and keeps the small fires small, which is most of the game. A fire that is caught at fifty acres never becomes a headline at fifty thousand.

On public land. Public lands belong to everyone, and grazing is one of the uses Congress authorized when it established the system. The Property Clause of Article IV, Section 3 gives Congress the power to make "all needful Rules and Regulations respecting the Territory or other Property belonging to the United States," and Congress used it to allow grazing under permit. If the public wants different priorities, the remedy is to change the law through Congress, not to starve permittees out through administrative attrition. The reasoning behind federal land ownership in the West is traced in Why Washington Owns Most of Nevada and What the Property Clause Allows.

The Point About Policy and the Press

Notice how the story is usually told. When a fire burns across a Western range, the coverage tends to focus on the weather and the climate. Those matter. What goes unmentioned is the fuel: the grass that has been allowed to build up for years because the agencies cut the grazing, the thinning, the burning or the mowing that would have reduced it. Fire policy is a decision about fuel, and fuel is a management decision. The coverage that omits this is telling half the story, and the half it omits is the half a policymaker can actually change. Weather we cannot change. Fuel we can.

The same logic runs through the larger fire debate. A century of putting out every fire as fast as possible, a policy that grew out of the early twentieth-century federal forestry and the Smokey Bear campaign of the 1940s, left the woods with too much fuel. It is why conservatives, and a growing number of scientists, argue for active management: thinning, prescribed fire, grazing and the cooperation of the people who live nearby. Nature is not a museum. It is a working system, and the people who work it are the best partners we have. That is the spirit of Theodore Roosevelt Made Conservation a Conservative Cause, and It Still Is, where wise use was the point, and of Farmers Saved the Soil After the Dust Bowl, Long Before Earth Day Existed, where farmers fixed a disaster at the local level.

What a Sensible Policy Looks Like

State it as a checklist.

• Keep the permits and manage them. Use rotation, rest, monitoring and the enforcement of stocking rates.
• Authorize targeted grazing as a fuel-reduction tool, with clear plans, so that ranchers can be paid or credited for work that benefits the public.
• Build and maintain fuel breaks, with grazing as one of the maintenance tools.
• Streamline the paperwork. Environmental reviews that take years for a routine grazing decision leave the fuel in place while the paper moves. The scale of such review is part of the broader pattern in We Raised the Empire State Building in About a Year, So Why Not a Power Line.
• Partner with the people on the land. Ranchers, rural fire districts and local governments should be at the table, not on the other side of a lawsuit.
• Judge by results. Measure fuel loads, fire sizes and range condition, and adjust.

None of this requires believing that cattle solve everything. It requires believing that a fire policy ought to use every tool that works, and that a rancher on the land is an asset to the public, not an obstacle.

The case in brief

1. Range fires run on fine fuels, and cheatgrass in the Great Basin creates a continuous, early-drying fuel that feeds a grass-fire cycle.
2. Well-managed, targeted grazing reduces fine fuels and helps maintain fuel breaks, and the Bureau of Land Management manages the rangeland under the framework that began with the Taylor Grazing Act of 1934.
3. The critics are right that overgrazing, trampled streams and badly timed grazing do harm, and the answer is careful management, not abolishing the practice.
4. Cattle do not stop wind-driven firestorms, but they help keep small fires small, and retiring permits can leave more fuel on the ground.
5. Public land policy belongs to Congress under the Property Clause, and ranchers should be treated as partners in fire prevention.

What you can do: look up the Bureau of Land Management field office that manages the public land nearest you, read its fuels or grazing plan, and send a public comment or attend its next open meeting.