Tallgrass Prairie Center


Luze Farm Case Study

Click here for a pdf version of the Luze case study.

Luze prairie strips


Randy Luze and his daughter Mollie Aronowitz share a goal: Seeing the use of reliable, cost-effective conservation practices scaled up across Iowa’s agricultural landscape. Both are certified land managers with the People’s Company,
and in that role have seen farmland management values evolve. Owners of Iowa farmland - especially absentee owners - are increasingly interested in sustainable agriculture, and this provides Randy and Mollie opportunities to talk
about farming practices that improve water quality, soil health, and climate resilience.

Randy and Mollie’s work helping clients assess sustainability options is enhanced by their own practical experience farming 1700 acres near Dysart. About 80% of their fifthgeneration farm – located on some of the best soil in the state – is in seed corn and seed bean production; the remainder is conventional corn and beans. Four hundred of the acres farmed by the Luzes are owned by the Purdy family, absentee landowners whose neighboring farm is managed by Hertz. Like the Luze family, the Purdys have owned their land for generations and are committed to soil health.


Erosion reduction and management of nutrients frame the Luze’s farmland stewardship decisions. Randy has experimented with a variety of tillage and cover crop practices, and paid close attention to how each impacts farm efficiencies and economics. He’s also carefully considered management challenges. “All conservation practices have challenges,” Randy and Mollie point out, and that’s especially true when trying to implement something like cover crops across 1,700 acres. “You can have fantastic success with cover crops,” Mollie says, “Especially after you’ve done them for multiple years and built up the soil structure.” But the struggle is being able to consistently do the practice over hundreds of acres in the few days Mother Nature provides the right field conditions. As an alternative, Randy considered installing contour terraces (and tile inlets) for erosion and nutrient reduction. But around the same time, he learned about Iowa State’s prairie strips research. The prairie strips’ success at reducing nutrient loss in crop fields impressed Randy. So did the fact that the strips were easier and less expensive than terraces.


Partnering with UNI’s Tallgrass Prairie Center (TPC), Randy installed 10 acres of prairie strips in 2015. Together, they planted seven prairie strips in an 80-acre, conventional corn/bean field on the Luze farm. They also installed three strips through a 40-acre seed corn/bean field on the Purdy’s ground. The TPC seeded the strips as a research and demonstratioan project using three mixes: economy, diversity and pollinator – each with an increasing forb:grass ratio (1:3, 1:1, 3:1, respectively). Enrolled in continuous-CRP CP-15A (grass contour strips) which allows seed-mix flexibility, the prairie strips were laid out on the contour. (Across the Luze’s long slopes, that means some of the strips are nearly straight.) To place strips on the Purdy farm, Randy took the idea to their farm manager, Lewain Beirmann. Beirmann describes the Purdys – who live in various places around the country – as “big-picture thinkers.” “They ask a lot of questions … and want verification that a practice will make sense on their land.” After doing research, the Purdys agreed to place the strips on a slope with existing terraces. Runoff had been overtopping the terraces during big storms, so the strips were placed in line with and over the structures, to stabilize them and extend slope protection in both directions. The Purdy strips, like the Luze strips, are also enrolled in a 10-year, CP-15A contract. The per-acre payment for both farms is over $300, a return that makes it easier to idle acres – especially through seed corn.

Luze prairie strips


In 2021, Randy and Mollie continue to monitor the mature prairie strips, assessing outcomes not only for their own operation, but so they can knowledgeably answer their clients’ questions. “There’s a lot of talk about prairie strips,” Mollie says. “Trying it out on our own farmland has given us an opportunity to see if it’s doable.”

Randy thinks the strips have helped to reduce erosion and nutrient loss, and is confident soil structure is improving under the strips. He’s considered moving them at the end of his CRP contract to expand the soil health benefits in his field. Across the road on the Purdy farm, the strips have stopped storm water from running over the terraces.

Randy notes his Pioneer contacts have been supportive of the strips through the seed production field. “They recognize these fields are more intensively tilled, so they want good erosion-control measures in place.”

Purdy family members have been pleased to see monarchs and other pollinators in the strips, and appreciate the “return of some diversity” to the farm. Pheasants have made a comeback too, a benefit to neighboring hunters.

Because the initial strips layout was designed with Luze equipment in mind, farming around the strips has proven largely trouble-free. Randy notes a couple spraying considerations: Overspray is more likely to occur where the contours curve, because of the way the sprayer swings around. On occasion Randy purposefully sprays the edge of the straighter strips. “We’ve got things spaced for our equipment, so when we see the strips creeping into the field, we just spray them back.”

While the bulk of prairie strips management happens during the first couple years, Randy notes that weed and tree control is an ongoing effort. “You’ll have trees,” he states, and recommends a skid loader attachment to pull the seedlings.

Weeds, Randy says, will also be an issue. Because his strips were seeded with three different mixes, he’s had the opportunity to observe differences in weed pressure. “It’s highest on the pollinator mixes,” probably because they lack the dense, vegetative cover provided by grasses. He notes other possible drawbacks to less grass: reduced erosion control on slopes and spottier mid-contract burns.

While the diversity and economy mixes have both worked well for the Luzes, Randy sees potential for a grass-only option, depending on owner/operator goals. The native grass mix would allow chemical broadleaf control during stand establishment, one of several ideas Randy and Mollie have considered when thinking of ways to scale up prairie strips acres. Simplifying the process, they feel, is key.

That includes seeding. Its likely more acres would be planted if operators could seed their own strips, the Luzes think. But conventional grain drills don’t work with prairie seed, nor do most other types of typical farm equipment. Could existing equipment be modified? Are better seed carriers available? Is there a more efficient way to deliver large quantities of seed to the farm? These are all areas of critical need for adding strips acres, Randy says.

Mid-contract burns are another consideration. Burn contractors can be hard to find and tenants may be reluctant to make the effort.

“We need to help absentee owners get involved,” Molliesays. “They need to be able to tell their renter ‘I’m taking the acres out of production, so it’s not yours to worry about anymore.”

A final consideration: NRCS cooperation. Randy praises the Benton County NRCS staff for laying out his strips to maximize equipment efficiency and for ensuring they qualified for CRP payments. Not all offices may be as knowledgeable and accommodating, a barrier Randy hopes will recede as more strips are planted and their benefits become more widely known.

“The whole key to farming in Iowa is to be able to consistently do the same practice over 2,000 acres in the couple of days mother nature gives you the field conditions you need . . . Managing that risk is huge and prairie strips is something one could control. You do it, it’s there, and you don’t have that ongoing seasonal risk as you do with cover crops.” -Mollie Aronowitz

Luze timeline