The Complete History of Sod Harvesting Equipment

Brouwer Kesmac 4000-24R automatic sod harvester. Photo courtesy of Brouwer Kesmac.

From Hand Tools to $600,000 Machines

If you've ever watched a pallet of sod get loaded onto a truck in under a minute, you're looking at the end result of roughly 80 years of stubborn, practical innovation by a handful of farmers who got tired of breaking their backs. The story of sod harvesting equipment is one of the least-documented industrial histories in American agriculture — and it's fascinating, because almost every major leap happened because a sod grower got fed up with the labor problem and decided to build something in his own shop.

This is the full story, from hand-cut turf to six-figure automated harvesters that stack pallets without a human touching a blade — and where the industry is heading next, which turns out to be a place that looks a lot more like a sci-fi movie than a sod farm. It's a natural companion to our complete history of sod harvesting in America — that piece covered the industry; this one covers the machines that made it possible.

The Hand-Tool Era: Before 1948

Before mechanical equipment existed, sod harvesting was brutal manual labor. Workers used flat-edged hand spades and long sod knives to slice turf into strips, then rolled or folded the strips by hand and stacked them directly onto wagons. A single worker might harvest a few hundred square feet in a day if conditions were good. A crew of six could supply a modest landscape project, but that was the ceiling.

This is why early-20th-century sod was almost exclusively used for high-budget applications — cemeteries, golf courses, estate lawns, and public parks. Residential sod simply wasn't economical at the labor rates required to produce it.

One of the earliest commercial sod operations in America was started in 1932 by a man named Ben Warren in Palos Heights, Illinois, a Chicago suburb. Warren's Turf grew Kentucky Bluegrass — the grass that would become the foundation of the American commercial sod industry — and grew into one of the foundational companies of the modern sod business. The farm would eventually relocate to Anderson, Indiana in 1960 and continue operating under various ownerships for nearly a century, all while witnessing and adopting every major equipment innovation described in this article. A longtime Warren's employee once summarized the company's equipment history in a single sentence: "I've moved from a Ryan hand sod cutter to the Brouwer, and now to the Trebro AutoStack." That's the whole story of commercial sod harvesting in one sentence.

The Ryan Sod Cutter: The First Real Machine (1948)

The first meaningful piece of sod harvesting equipment came out of a partnership between a Minnesota landscaper named Art Ryan and a machine shop called K&N. In 1948, they produced the Ryan Sod Buster — a walk-behind gasoline-powered machine that cut turf into strips roughly 12 inches wide and 3 feet long.

The Sod Buster didn't stack or roll anything. It just cut. Workers still had to follow behind, fold or roll the strips, and hand-stack them on pallets or trucks. But it eliminated the cutting step, which was the most physically demanding part of the job, and it set the standard for the next 25 years.

The machine went through several revisions and was eventually renamed the Ryan Sod Cutter. Remarkably, you can still buy a new walk-behind sod cutter today, though they're used almost exclusively by landscapers clearing old lawns rather than by commercial sod farms.

The Industry Organizes: ASPA Is Founded (1967)

By the 1960s, the American sod industry had grown large enough that farmers needed a way to talk to each other. In 1967, a group of 40 Midwest sod farmers met and formed the American Sod Producers Association (ASPA). It was the first trade organization dedicated specifically to commercial sod production. ASPA would eventually rename itself Turfgrass Producers International (TPI) in 1994 to reflect its growing global membership, and today TPI represents sod farmers, equipment manufacturers, seed suppliers, and researchers from around the world.

The timing is significant: ASPA was founded five years before Brouwer built his first harvester. The industry had already reached critical mass under hand-and-walk-behind-cutter labor. The explosion was about to come.

Gerry Brouwer Changes Everything (1966–1974)

The real revolution started in Keswick, Ontario, on a sod farm owned by a Dutch-Canadian farmer named Gerry Brouwer. Brouwer had been in the sod business since 1959, and like every other grower of his era, he was sick of the labor problem. Finding reliable workers to stack sod in the sun all day was nearly impossible.

In the mid-1960s, Brouwer sketched out an idea for a tractor-mounted harvester that could cut sod, move it onto a conveyor, roll it, and stack the rolls on a pallet — all in a single pass. He worked with a friend who owned a welding shop and built a prototype.

Here's where the story takes a turn that most people don't know. Brouwer's second prototype caught the attention of the Ryan Company — the same folks selling the walk-behind sod cutter — and he signed a royalty agreement with them in the late 1960s. But Ryan's engineers ignored Brouwer's recommended changes, the machine didn't work well in the field, and in August of 1971, Ryan handed the patent rights back to Brouwer.

By November of that year — three months later — Brouwer had built a new working prototype. In 1972, the first Brouwer Sod Harvester was built in his farm shop. In 1974, he opened a factory in Keswick, and the rest of the industry was never the same.

The first complete Brouwer harvester sold for $9,600. One machine replaced six to eight manual workers. In some larger operations, a single harvester replaced as many as 25 people. By 1985, Brouwer's company had captured roughly 95 percent of the worldwide market for mechanical sod harvesters.

The Global Expansion: Israel, Russia, and Beyond

Brouwer didn't just sell equipment — he helped establish the sod industry in countries that had never farmed turf before. He helped set up the first sod farm on an Israeli kibbutz, because where there's sod, there's a market for harvesters.

In 1998, he got a call from the office of Russia's agriculture minister. The Kremlin wanted sod, and they wanted it now. Brouwer flew to Moscow as a consultant, helped locate suitable land, and advised on production methods. Eight or nine new Russian sod farms were eventually established, and Moscow's boulevards — which had been weeds and mud around the Kremlin — got their first real grass. Every one of those farms needed Brouwer equipment.

This is why the Brouwer name is on harvesters in more than 30 countries today.

The Tvetene Brothers and the Trebro Revolution (1999–2000)

While Brouwer was dominating the harvester market from Canada, a competing revolution was quietly being engineered in Billings, Montana.

Ted Tvetene had started growing sod in Minnesota in the 1960s and moved his operation to Montana in 1968. His three sons — Mike, Gregg, and Don — grew up stacking sod by hand on the family farm. That experience shaped everything that came next. As Ted later put it, "The boys had to stack sod, so they were highly motivated to invent a machine."

In the 1980s, facing the same labor shortage that had driven Brouwer, the three brothers started designing an automatic stacking harvester. Mike handled the electronics. Gregg worked on the hydraulics. Don did the welding and fabrication. They spent 13 years in development and another two years before production began. The technical challenge was enormous — mobile electronic systems in the 1980s weren't sophisticated enough to handle automated stacking, so Mike had to design a custom control system from scratch.

They formed Trebro Manufacturing in 1999. In 2000, they introduced the AutoStack — the first fully automatic stacking turf harvester in the world. One operator could do the work that previously required three conventional harvesters and a full crew of manual stackers.

The AutoStack was an immediate international success. Trebro opened a UK office in 2003, and by the mid-2010s had sold more than 750 automated harvesters across 22 countries. Today a new Trebro harvester sells for between $400,000 and $600,000 depending on specifications.

The Patent Wars: Trebro v. FireFly (2012–2014)

The sod harvester market is so small — essentially Trebro, Brouwer Kesmac, and a handful of smaller players — that intellectual property became a serious business issue in the 2010s.

In 2012, Trebro was issued a patent on a method and apparatus for harvesting and picking up sod, invented by Gerry Brouwer himself and licensed to Trebro. When a Utah company called FireFly Equipment released a harvester called the ProSlab 150, Trebro sued, arguing that FireFly was infringing on patented technology.

The case went up to the Federal Circuit Court of Appeals in 2014. In testimony, Trebro's president revealed just how small this market really is: Trebro was selling about eight sod harvesters a year at roughly $210,000 each, and losing even one sale meant a $50,000 hit to gross profit. The entire competitive market for automated harvesters in North America consisted of Trebro, FireFly, and Brouwer's company.

The case established a critical precedent in the industry and cemented the importance of patent protection in a business where a single innovation — like a vertically-moving horizontal conveyor — can be worth tens of millions of dollars over a patent's lifetime.

Big Rolls, Slabs, and Why the Harvester Depends on Your Grass

Here's a nuance most homeowners never think about: the machine that harvests your sod depends on what kind of grass you're buying.

Cool-season grasses — Kentucky Bluegrass, Tall Fescue, Perennial Ryegrass — are typically harvested in two formats: small rolls (roughly 2 feet wide by 5 feet long, 10 square feet each) for residential delivery, and big rolls (commonly 4 feet wide by 250 feet long — about 1,000 square feet per roll) for sports fields, golf courses, parks, and large commercial installations. The fibrous, interlocking root system of cool-season turf — especially bluegrass, which spreads by rhizomes — knits tightly enough to hold together when it's rolled up like a giant carpet. You can lay a 4'x250' roll down a football sideline in minutes.

Warm-season grasses — Bermuda, Zoysia, St. Augustine, Centipede — are harvested as slabs, not rolls. The root structure is different: warm-season grasses spread primarily through stolons (above-ground runners) and shorter, woodier root systems that don't form the same dense, flexible mat as cool-season turf. Roll up a piece of Zoysia or Bermuda and it'll crack, fall apart, or lose too much soil to survive transplant. So warm-season sod is cut as rigid slabs — typically 16 inches by 24 inches in a residential configuration, stacked flat on pallets — and installed like tiles rather than unrolled like carpet.

This split runs all the way through the equipment world. The major harvester manufacturers actually build two entirely different product lines:

• Slab harvesters for warm-season farms — the Brouwer Kesmac 6000-TS Automatic Slab Sod Harvester, the Trebro TSS (Trebro Slab Stacker), and the Firefly ProSlab 150 and 160. These machines cut, lift, and stack rigid rectangular slabs without rolling them.
• Roll harvesters for cool-season farms — the Brouwer Kesmac 4000 Automatic Roll Sod Harvester and Robomax JD, the Trebro AutoStack and AutoStack II, and the Firefly R300 Mini Roll. These machines cut, roll, and stack rolls on pallets.
• Big roll harvesters — a specialized subset almost exclusively used for cool-season turf destined for sports fields and golf courses. Brouwer invented the first patented automatic big roll system, now used under license by Bucyrus. The Brouwer Rollmax 2400 is one of the most widely used big-roll machines in the world. A single 4'x250' roll can re-sod an entire football sideline in one pass, which is why stadium grounds crews rely on them for mid-season field repairs and — as we'll see next — Super Bowl-week installations.

So a sod farm growing Bermuda in Georgia is running completely different equipment than a sod farm growing Kentucky Bluegrass in Connecticut — even though both farms might buy from the same two manufacturers. It's a good example of how one industry quietly forked into two engineering traditions based on something as simple as the way grass roots grow.

The Super Bowl: The Most Watched Sod Installation on Earth

Nothing illustrates the modern sod equipment industry better than what happens in the weeks before a Super Bowl.

The tradition of replacing the Super Bowl field with custom-grown sod started after Super Bowl XXVII in January 1993, played at the Rose Bowl in Pasadena. That month, Pasadena got roughly 16 inches of rain — nearly four times its January average — and even with tarps, large sections of the Rose Bowl field had to be patched before kickoff. That game, best remembered for Leon Lett's fumble at the goal line, is also remembered in sod circles as the one that made the NFL say "never again." Ever since, the league has replaced the natural grass in every Super Bowl stadium with custom-grown sod prepared specifically for the game.

Most of those fields have been supplied by a single California company, West Coast Turf, which has produced more than a dozen Super Bowl fields over the last 30-plus years. They typically grow the grass on plastic — yes, literal plastic sheeting — which forces the roots to mat sideways instead of going deep, producing a dense, carpet-like root structure tough enough to survive halftime stages that weigh 6,000 to 10,000 pounds and require 500 people to roll on and off the field.

When it's time to install, the sod is cut into massive big rolls — typically 40 to 50 feet long, 3.5 to 4 feet wide, each roll weighing between 2,000 and 2,500 pounds. A single Super Bowl field takes roughly 500 of these rolls, hauled on 20 to 24 flatbed trucks. The grounds crew then installs the entire 80,000-square-foot field in two to three days using specialized equipment like the SIDEKICK sod installer — a machine invented by Green Source that won the Sports Turf Managers Association's Innovative Award in 2013, used to compress and lock big rolls together without the operator ever touching the turf.

For decades, the godfather of Super Bowl fields was literally called "The Sodfather" — George Toma, who worked on the first 57 Super Bowls as either head groundskeeper or field consultant, retiring at age 95 after Super Bowl LVII. Toma didn't run harvesters, but every harvester innovation in this article eventually passed through a field he touched.

Two NFL stadiums — State Farm Stadium in Glendale, Arizona, and Allegiant Stadium in Las Vegas — take this logic one step further: their entire playing surfaces sit on 40-inch-deep trays that roll in and out of the stadium on railroad-style tracks, so the grass can grow outside in real sunlight and rain and then be wheeled inside for game day. At State Farm, the tray is 234 feet wide and 403 feet long, rolling on 546 steel wheels across 13 tracks and traveling 740 feet in or out of the stadium. It's the largest moving machine in American sports — and it exists solely because people wanted to keep playing football on real grass.

The Automation Era: Robots, AI, and the Self-Driving Sod Farm

Here's where the story gets wild.

Modern sod harvesters like the Trebro AutoStack 3 and the Brouwer Kesmac 4000-R aren't just mechanical — they're rolling computers. The AutoStack 3 uses ultrasonic sensors mounted on its steering arms to follow the harvest line with quarter-inch accuracy, which is more precise than most human drivers on their best day. The operator isn't really steering anymore; they're supervising. Harvesting, rolling, stacking, and palletizing all happen automatically while the machine drives itself down the row. One person now does the work that 25 people used to do, and they're doing it from an air-conditioned cab while the machine basically runs itself.

That's today. The future is weirder.

Across agriculture as a whole, the autonomous revolution is already here. John Deere's autonomous 8R and 9RX tractors are commercially available right now — you can buy one, point it at a field, and walk away. They plow, plant, and haul with no one in the cab, navigating with LiDAR, high-resolution cameras, and RTK-GPS that locks them to centimeter-level accuracy. A 10,000-acre farm in Illinois saw a 15% productivity jump after switching to autonomous tractors. No coffee breaks. No bad moods. No calling in sick on harvest day.

Then there are the retrofit companies. Bluewhite Robotics converts conventional tractors into autonomous ones using a kit that installs in under a day — cameras, LiDAR, GPS, and an AI control module bolted onto equipment the farmer already owns. Their systems are already running on more than 60,000 hectares of orchards in the U.S. and Israel. Fraunhofer IOSB in Germany has demonstrated a retrofit kit that lets a farmer pilot a tractor from over 200 kilometers away, which sounds like a stunt until you realize that's basically how commercial drone pilots already work.

And it's not just tractors. Carbon Robotics builds a machine called the LaserWeeder that uses AI-powered computer vision to identify weeds in real time and zap them with lasers — no herbicides, no hand-weeding, no tilling. It's rolling across fields right now, shooting weeds with lasers, and it's not a prototype. It's a product you can buy. There are AI-powered strawberry harvesters, robotic kiwifruit pickers, autonomous soil-sampling robots, and drone swarms that spray fertilizer with pinpoint accuracy.

The global market for AI in agriculture was worth $2.4 billion in 2025 and is projected to hit $10.2 billion by 2032. Demand for agricultural robots has more than doubled between 2020 and 2025, and it's accelerating.

So what does all this mean for sod?

Sod farming is actually one of the better candidates for full autonomy. Unlike fruit picking — which is a nightmare for robots because fruit is delicate, irregularly shaped, and hides under leaves — sod harvesting happens on flat, uniform fields where the crop grows in perfectly predictable rows. The harvester already drives itself. The cutting, rolling, and stacking are already automated. The last human touch points — starting and stopping the machine, steering around obstacles, loading pallets onto trucks — are exactly the kinds of tasks that LiDAR, computer vision, and AI path-planning have already solved in other industries.

It's not hard to picture what a sod farm looks like in 10 years: a fleet of fully autonomous harvesters running from dawn to dusk, communicating with each other to avoid collisions, stopping on their own when they detect a field anomaly, and calling a human only when something genuinely unusual happens. The pallets get loaded by autonomous forklifts. The trucks that haul the sod to customers are driven by the same kind of self-driving systems already being tested on highways. The only humans on the farm are the ones doing the work machines still can't do — making decisions about what to plant where, negotiating with customers, and occasionally walking out into the field to check on the grass.

The irony is that the sod industry has been quietly doing this for 50 years. Gerry Brouwer automated sod cutting in 1972. The Tvetene brothers automated sod stacking in 2000. The next person to put their name in this history book will be the one who automates the driver.

Today's Market: Kesmac, Trebro, and the Consolidation

The Brouwer company became Brouwer Kesmac in the 2000s after a merger with Kesmac, another turf equipment manufacturer. The combined company now offers 19 different products, from the Robomax JD and 4000-R automatic roll harvesters to the 6000-TS automatic slabber, and operates out of more than 100,000 square feet of manufacturing space in Georgina, Ontario.

On the Trebro side, the Tvetene brothers recently sold Trebro to Craftco Manufacturing Solutions, a Sheridan, Wyoming fabrication company that had been Trebro's primary sub-contractor for years. It was a natural fit — Craftco had already been building many of Trebro's components.

The broader market for harvester blades, netting, pallets, and replacement parts is served by a handful of specialized distributors like GM Turf Equipment and R&R, which keep older machines running on farms across North America.

Why This History Matters

Harvesting that once required a full crew working sunup to sundown — cutting, folding, and stacking by hand — can now be done by a single operator in the cab of a machine, producing a fresh pallet every couple of minutes. That's the reason residential sod became affordable in the first place.

Without Gerry Brouwer's prototype harvester in 1971 and the Tvetene brothers' AutoStack in 2000, sod would still be a luxury product reserved for estates and golf courses. But equipment is only half the story. The grasses themselves were the product of a separate, equally important revolution happening in university breeding programs throughout the 20th century — a story we've told in detail in our complete history of turfgrass breeding. Scientists at Rutgers, Penn State, and other land-grant universities spent decades developing the cultivars that could handle commercial harvesting, survive transplant, and thrive in home lawns — grasses that were ready for mass-market use long before the equipment caught up. It took Art Ryan, Ben Warren, Gerry Brouwer, and the Tvetene brothers to close that gap on the machinery side and turn sod from a luxury into an everyday landscaping product.

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The next chapter is already being written in John Deere's autonomous 8R, Bluewhite's retrofit kits, and Carbon Robotics' laser weeders. The sod farm of 2035 will probably run itself — no drivers, no stackers, no operators — and somebody reading this article today is probably the one who's going to build it. For the broader story of how the American sod industry itself came to be — from the "Nebraska marble" of the Great Plains to the post-WWII Levittown lawn boom to today's multi-billion-dollar industry — see our complete history of sod harvesting in America . Every pallet of sod that lands on a driveway today traces back to the same handful of people who decided the old way wasn't good enough. The next chapter is being written by people who feel exactly the same way about the way we do it now.