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Iowa Farmer Invents 'Cluster Cluck 5000' To Bring Livestock Back To Corn Fields

Farmer Zack Smith, who calls himself "The Stock Cropper," pets one of the pigs in his mobile pen.
Amy Mayer
Harvest Public Media
Farmer Zack Smith, who calls himself "The Stock Cropper," pets one of the pigs in his mobile pen.

An Iowa farmer is using YouTube and a new invention to bring back an old-fashioned style of agriculture.

Zack Smith pats the snout of a pig that stretches up to greet him from inside the back pen of a mobile barn. On this field, Smith planted alternating sections of corn and pasture, to test an experiment he calls “stock cropping.” 

“This is our answer for putting diversification and multiple species back on the land,” he says. “And we’re going to have a four-ring circus, was my idea, of animals parading through, grazing and laying their manure down.”

The pen in front of the barn houses the goats and sheep, which chomp through the tall sorghum-Sudan grass. They can shelter under a roof, which is angled to collect rainwater. The pigs also have access to the shelter, but they are separated from the small ruminants by the center of the unit, which offers the animals their supplemental feed and water. 

“We call it the ClusterCluck 5000,” Smith says. He and his business partner, Sheldon Stevermer, who is a farmer and an engineer, designed and built the system. Solar panels, web cameras and autonomous movement are among the technologies they’ve deployed. And there’s more to come. 

“You could have an app on your phone and say ‘move the barn’ and hit the button, and Siri would make the barn move ahead for you,” Smith says. 

Stock cropping is Smith’s attempt to mix some of the best practices of the past, such as raising multiple kinds of livestock on the same land as crops are planted, with modern ideas that will slowly steer agriculture toward a more environmentally sustainable future. 

 Zack Smith follows some of his goats and sheep out of the mobile barn and into the front pen, where the small ruminants will eat down the pasture.
Credit Amy Mayer / Harvest Public Media
Zack Smith follows some of his goats and sheep out of the mobile barn and into the front pen, where the small ruminants will eat down the pasture.

“I’m part of the Big Ag machine,” he says. “It’s like anything. It’s the Titanic. It doesn’t just spin on a dime.”

Smith is a fifth-generation Iowa corn and soybean farmer, who also has seed and chemical input businesses. He says he’s aware of the privilege that lends him, such as the fact that his family owns the ground he’s experimenting on so he has more ability to take risks. But he also sees how much his part of rural north-central Iowa has changed since the 1950s.

“Within one mile of the stock cropper there were 16 farm families that made their full living off the land,” he says. “And there’s one left in 2020.” 

His experiment has three goals: improve soil for better crops, direct-market meat to customers, and revitalize rural communities. His ambition goes far beyond his own operation. He and Stevermer filed patents on their Cluster Cluck technology and hope to eventually make the barns available and affordable for others.

“Some of the funds that we’ve gotten from some of the bail-out money and packages we’ve had have actually applied toward this system,” he says, referring to trade aid from the Market Facilitation Program and farm support through the CARES Act. “Because I figure,if I’m going to get taxpayer dollars, I’m going to put it toward something that could develop something positive for the future for other farmers as well, not just myself.”

To reach farmers and others who might be interested, Smith maintains an active social media presence, including a YouTube channel with videos that chronicle the season. 

Soil and water quality

Ben Hollingshead is an agronomist with Key Cooperative in Kelly, Iowa, and he’s been following Smith’s experiment on Twitter. Hollingshead says the pasture plants will improve the soil, creating a better starting point for the crops planted on that spot the following year.

“The more species, and different types of roots, that you have in that soil makes that soil more resilient, more apt to be able to hold nutrients,” Hollingshead says. The animal manure will contribute nutrients that may be less vulnerable to leaching or running off than chemicals applied during the growing season. 

“The more resilient we continue to make that soil, the less apt you’re going to have that runoff, erosion and those types of loss scenarios,” he says.

And because the pasture sections break up the corn, more of the corn plants are growing on the edge of a section, which can slightly increase yield thanks to better sun exposure. But Hollingshead cautions that this can backfire in a very hot year when those edge rows can end up getting too much heat. Hollingshead says Smith’s ideas are intriguing.

“This is fantastic, I think, from an environmental standpoint, but you’ve got to be able to make a living at what you’re doing,” he says. 

The sheep and goats are the lawn mowers of the stock cropping operation, says farmer Zack Smith.
Credit Amy Mayer / Harvest Public Media
The sheep and goats are the lawn mowers of the stock cropping operation, says farmer Zack Smith.

The current agriculture economy has been struggling, and that makes it very difficult for many farmers to even consider changes, despite growing recognition that longer crop rotations, cover crops or other conservation practices can have long-term benefits for the land and the bottom line. It’s the short-term math that doesn’t always add up.

Local meat

When Smith harvested the corn on this experimental plot, he got a satisfying but not wow-ing yield average of 262 bushels per acre. But because of the way he plans to stack his commodity crop and direct-sales meat enterprises, he finds that figure acceptable, as he discusses in his harvest video. 

“The thing that makes me the happiest in the whole deal is the fact that the corn will be the least-profitable piece in the puzzle,” he says. “The value of what we’re producing with the livestock and walking them off, and selling them directly to consumers, we’re going to be significantly better off than if we just had corn on that field.” 

The meat he’s raising is not destined for a major meatpacker and a grocery store shelf. He plans to appeal directly to discerning consumers’ values by presenting the soil and water quality benefits of his system and, he hopes, a calculation that shows the carbon footprint for a pound of meat is lower in his system than the conventional one. 

“It all hinges on being able to produce grass-fed, pasture-raised meats either for a local or more regional market and getting a premium for that meat,” says Meghan Filbert, livestock program manager at Practical Farmers of Iowa.

“Do the majority of Iowans care enough, do they actually want this?” she asks. “I’m not sure that’s the case.”

Revive rural economies

Smith’s projection is that eventually a farmer could put 30 Cluster Cluck mobile barns on an 80-acre field and in addition to crops raise 200 sheep, 200 goats, 450 pigs and 9000 chickens in a season. That would require dedicated livestock workers and probably a marketing person or team. Creating jobs on a diverse farm operation, Smith says, will help make living in a rural area plausible for families that don’t already own land and don’t see a path toward buying it. 

“I don’t know that we could get back to 16 (families), but man if it was eight instead of one, what a change that could be for rural communities.”

Credit Amy Mayer / Harvest Public Media

Smith says his progressive farming ideas follow from his grandfather, who employed a couple of dozen people to help him farm 1200 acres with horses. His brother contributes to the most modern aspects of the experiment, though, as he’s an aerospace engineer who has experience with artificial intelligence and self-driving equipment. 

“If you can find a way to produce goods, to produce products in a way that has a bit more labor, creates more economic activity in your community, and even just that activity on the farm, I think at the end of the day that is going to be a net plus,” says Johnathan Hladik, of the Center for Rural Affairs in Lyons, Nebraska.

Before farmers can add the number of livestock Smith is talking about, they’re going to need to know there’s a plant that can slaughter the animals and butcher the meat. Most local meat lockers are already at capacity, a fact that came to many people’s attention as coronavirus outbreaks shut down major meatpacking plants throughout the Midwest. Many lockers are now scheduling animals for 2022 because 2021 is already fully booked. 

Building a new plant from scratch could cost $2 million and take two years, Filbert estimates. But Hladik points to a bill before Congress to help spur more investment in new plants and job training as a sign the need is gaining attention among people with the ability to help. 

“We know we’re going to need some workforce, we know there’s demand. And that can be a heck of a good job,” he says. “So a grant training program to help make sure that we can train individuals on what this job is and how to do it correctly can go a really long way in ensuring that this is an enduring business option for that community.”

Follow Amy on Twitter: @AgAmyinAmes

Copyright 2020 Harvest Public Media.

Amy Mayer is a reporter based in Ames. She covers agriculture and is part of the Harvest Public Media collaboration. Amy worked as an independent producer for many years and also previously had stints as weekend news host and reporter at WFCR in Amherst, Massachusetts and as a reporter and host/producer of a weekly call-in health show at KUAC in Fairbanks, Alaska. Amy’s work has earned awards from SPJ, the Alaska Press Club and the Massachusetts/Rhode Island AP. Her stories have aired on NPR news programs such as Morning Edition, All Things Considered and Weekend Edition and on Only A Game, Marketplace and Living on Earth. She produced the 2011 documentary Peace Corps Voices, which aired in over 160 communities across the country and has written for The New York Times, Boston Globe, Real Simple and other print outlets. Amy served on the board of directors of the Association of Independents in Radio from 2008-2015.
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