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The Devil’s in the Details

Regenerative Ag Can Help Bring Our Dysfunctional Relationship with Phosphorus Back into Balance

By Brian DeVore
February 26, 2025

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In the early 2000s, I wrote a series of Land Stewardship Letter articles about a generic environmental impact statement study that was done on Minnesota’s livestock industry. The final report had an interesting finding related to phosphorus, a key source of crop fertility: small livestock farms had a medium phosphorus shortage of 17 pounds per acre, while the largest feedlots had a phosphorus surplus of 38 pounds.

It turned out the larger operations tended to have less land per animal available to spread the manure; it’s not economically viable to transport liquid manure more than a few miles from its source. Smaller and medium-sized farms were more likely to have a variety of crops, along with pasture grasses, growing nearby, thus providing land for manure application. In such a closed-loop system, an element like phosphorus gets taken up by the plants that, in turn, serve as a feed source for the animals. For CAFOs, phosphorus and other byproducts of livestock production morph from sources of fertility to waste products to be disposed of.

As journalist Dan Egan writes in the book, The Devil’s Element: Phosphorus and a World out of Balance, such situations have created what he calls the “phosphorus paradox—at the same time as we are drawing down our increasingly precious caches of mineable phosphorus rock we are overdosing our waters with it.”

Phosphorus is part of a mighty trifecta that makes modern agriculture possible. Levels of nitrogen, phosphorus, potassium — N-P-K — are monitored obsessively by farmers and agronomists. As Egan reports, it turns out phosphorus has never been easy to come by — the bones left on European battlefields were once “harvested” for their phosphorus content. The rock deposits we rely on today for phosphorus do not regenerate on a human timescale. Predictions about when we will run out of this element worldwide range from a few decades to 400 years from now.

But as Egan argues, paying attention to worldwide stocks may be moot — it’s the regional exhaustion that may cause the most upheaval in our food supply. Three-quarters of the rock phosphorus consumed in the U.S. is dug up in Florida, and those mines are on pace to be exhausted in as little as 30 years. Between 70% and 80% of the world’s phosphorus is located in Morocco and a Western Sahara territory it controls.

“For one country, essentially one guy — the king of Morocco — to control so much of something every plant so desperately needs is a recipe for global instability, or worse,” writes Egan.

Meanwhile, the reliance of row crops like corn have on phosphorus fertilizer, coupled with the growth of massive CAFOs and their production of phosphorus-laced liquid manure, have made this element a major environmental threat. Algae blooms fueled by phosphorus runoff are destroying water quality across the U.S. In one troubling incident, in August 2014 a plume of toxin produced by phosphorus-fueled cyanobacteria made its way into the Lake Erie water intake for Toledo, Ohio. Overnight, some 400,000 people couldn’t drink the water from their taps. By mid-summer, much of Minnesota’s surface waters will be green with phosphorus-fueled algae, spawning fish kills and making swimming a health risk.

 In his reporting for the Milwaukee Journal Sentinel, as well as in his 2017 book, The Death and Life of the Great Lakes, Egan proved adept at relaying “good news-bad news.” The Devil’s Element is no exception. The good news is that in the past we were able to get a handle on the phosphorus problem when states began imposing restrictions on how much of the element could be used in laundry detergents. As a result, lakes and rivers that had been inundated by algae recovered. The bad news is industrial agriculture has brought those algae blooms back with a vengeance.

The Wisconsin-based Egan describes the situation in that state’s Brown County, on the southern end of Green Bay. It’s home to numerous dairy CAFOs, and their manure is making its way into the water, which at times becomes so oxygen-starved that fish escape by flopping onto land. Residents have turned to using leaf blowers to push asphyxiating fish back into the water.

Egan would like to see heavier restrictions on how large farming operations utilize fertilizer and produce manure waste. There’s no doubt that at least the threat of a stick can have positive impacts. Shortly after Toledo’s algae bloom debacle, I was on a Land Stewardship Letter reporting trip in neighboring Indiana trying to figure out why that state was such a leader in cover-cropping. Farmers there repeatedly brought up the Toledo situation, and felt that building soil health was one way to avoid the regulations that could be prompted by such disasters.

So how do we work our way out of the “phosphorus paradox”? Frankly, the ”solutions” part of the otherwise excellent Devil’s Element was the least satisfying. The author describes some exciting ways to stop wasting so much of the element from the time it’s mined to when it’s applied as fertilizer — it turns out people are quite innovative when a scarcity approach is taken to a resource. But he touches all too briefly on efforts to support soil health practices that aren’t as reliant on phosphorus in the first place, and, when it’s applied, create the kind of environment that makes efficient use of the element.

Egan describes one “solution” the owners of dairy CAFOS like to tout: using anaerobic digesters to process manure into fuel. But such technology creates a situation where milk is a byproduct of manure production. In other words, CAFOs will have an incentive to grow even larger, and thus produce even more manure — and phosphorus.

The phosphorus cycle, much like the nitrogen cycle in places like southeastern Minnesota, is broken. We need policies, science, and markets that promote a regenerative farming system that closes the nutrient loop. It would be great to see a journalist like Egan spend time with some of the farmers who are part of the Land Stewardship Project’s Soil Builders’ Network — they are proving a broken system can be repaired. Such connections might not be a big stretch for the writer — at one point he describes a “sustainable dairy farming” system in which a cow grazes on well maintained pastureland, spreading its manure in an even pattern that results in more forage being grown, which in turn is then consumed by the cow.

“And on and on it goes — a virtuous cycle,” writes Egan.

Exactly.

Brian DeVore is the editor of the Land Stewardship Letter, producer of LSP’s Ear to the Ground podcast, and the author of Wildly Successful Farming: Sustainability and the New Agricultural Land Ethic.

Category: Blog
Tags: CAFO • cover cropping • Dan Egan • Devil's Element • fertilizer • manure • methane digesters • Phosphorus • regenerative farming • water quality

Upcoming Events

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October 2025

Wednesday October 29

4:00 pm – 6:00 pm
Book Event: We Can Do Better: Collected Writings on Land, Conservation, and Public Policy
Wednesday October 29
4:00 pm – 6:00 pm
Book Event: We Can Do Better: Collected Writings on Land, Conservation, and Public Policy
The Harkin Institute for Public Policy & Citizen Engagement, 2800 University Ave, Des Moines, IA 50311, USA

The Johnson Center for Land Stewardship Policy is excited to share that one of our its primary pillars of work — a published collection of Paul Johnson’s writings —  is set for release on Oct. 2.  The book features a brief biography and a discussion of Paul’s ideas within the historical and future contexts of private lands conservation. 

For details on We Can Do Better: Collected Writings on Land, Conservation, and Public Policy click here.

Thursday October 30

5:00 pm – 6:00 pm
Book Event: We Can Do Better: Collected Writings on Land, Conservation, and Public Policy
Thursday October 30
5:00 pm – 6:00 pm
Book Event: We Can Do Better: Collected Writings on Land, Conservation, and Public Policy
Ames Public Library, 515 Douglas Ave, Ames, IA 50010, USA

The Johnson Center for Land Stewardship Policy is excited to share that one of our its primary pillars of work — a published collection of Paul Johnson’s writings —  is set for release on Oct. 2.  The book features a brief biography and a discussion of Paul’s ideas within the historical and future contexts of private lands conservation. 

For details on We Can Do Better: Collected Writings on Land, Conservation, and Public Policy click here.

November 2025

Saturday November 1

6:15 pm – 9:15 pm
Community Potluck & Folk Dance in Bay City, Wis.
Saturday November 1
6:15 pm – 9:15 pm
Community Potluck & Folk Dance in Bay City, Wis.
W6275 Main St, Bay City, WI 54723, USA

Calling all folk dance lovers! The Land Stewardship Project is co-sponsoring a potluck and folk dance at the Town Hall in Bay City, Wis., on Saturday, Nov. 1. Can you attend or volunteer? LSP is looking for one or two more people to help represent our people-powered organization by tabling at this event. To volunteer, reply directly to this e-mail and let me know you’re available. 
 
For details, check out this flier. 

The potluck and dance are co-hosted by LSP members from Oxheart Farm and the Oak Center General Store. No RSVP required; please direct questions to Emmet at oxheartfarm@gmail.com.
 

Folk Dance Flyer 2025.jpg

Tuesday November 4

11:00 am – 12:00 pm
Birds in the Balance: Pest Control Services Across Crop Types
Tuesday November 4
11:00 am – 12:00 pm
Birds in the Balance: Pest Control Services Across Crop Types
Online

This 10-lesson Wild Farm Alliance virtual course teaches agricultural professionals and farmers how to support beneficial birds and manage pest birds on farms. By learning how to assess the farm’s avian needs and opportunities, farms can be designed to provide for a diversity of beneficial birds. 

If pest birds are a problem, they can be discouraged with specific practices during the shorter periods when they cause damage. The sessions cover the latest research, tools and resources, and are given by experts in avian pest control, entomology, ornithology and conservation. While many topics and species are specific to the Midwest, most of the principles discussed are applicable across regions. 

Continuing Education Credits have been requested and are expected to be approved from American Society of Agronomy.

For details and to register, click here. 

The Course Schedule:

LESSON 1

Why Birds Belong on the Farm: Biodiversity, Pest Control & A Thriving Landscape

Tuesday, September 23, 2 p.m. CT


LESSON 2

Birds as Pest Control Allies on the Farm

Tuesday, October 14, 11 a.m. CT


LESSON 3

Birds in the Balance: Pest Control Services Across Crop Types

Tuesday, November 4, 11 a.m. CT


LESSON 4

Integrating Habitat into Croplands: Prairie Strips and Bird Conservation

Tuesday, December 2, 11 a.m. CT


LESSON 5

Birds on the Farm: Balancing Biodiversity and Food Safety

Tuesday, January 13, 11 a.m. CT


LESSON 6

Beyond the Crop: Birds, Biodiversity, and the Power of Edge Habitat

Tuesday, February 3, 11 a.m. CT


LESSON 7

Bridging Forestry, Farming, and Habitat

Tuesday, February 24, 11 a.m. CT


LESSON 8

Perennial Pathways: Agroforestry for Birds and Biodiversity on Farms

Tuesday, March 17, 11 a.m. CT


LESSON 9

Birds on the Range: How Grazing Practices Shape Habitat for Grassland Species

Tuesday, April 7, 11 a.m. CT


LESSON 10

Birds at Risk: How Pesticides Shape Safety on Agricultural Lands

Tuesday, April 28, 11 a.m. CT

7:00 pm – 9:30 pm
Big Ag, Big Problems: LSP Panel on Rural Consolidation
Tuesday November 4
7:00 pm – 9:30 pm
Big Ag, Big Problems: LSP Panel on Rural Consolidation
Lanesboro Community Center, 202 Parkway Ave S, Lanesboro, MN 55949, USA

 
The concentration of money and power in our food and farming system is a threat to our rural way of life, the land, and Main Street economies. According to research compiled by Farm Action, agricultural industries ranging from poultry processing to seed distribution are now dominated by four or fewer corporations, creating a system that for all intents and purposes no longer represents an open market situation. This makes it next to impossible for small and mid-sized farms to compete economically.  

Those of us who grew up in the rural Midwest have seen these effects firsthand. As once vibrant agricultural economies diminish, so too do community resources: hospitals, public schools, religious institutions, grocery stores, and more. Young people who see little opportunity in their hometowns move to cities and suburbs to start their careers and families. 
 
A consolidated, corporate-controlled agricultural system is also wreaking havoc on our natural environment. Runoff from large-scale factory farms and row cropping operations threatens our drinking water and spoils natural landscapes that people from all walks of life cherish. Without intervention, it won’t be long before all of us — urban or rural, farmers and non-farmers, rich or poor, young or old — will be impacted by the devastation of Big Ag. 

Join the Land Stewardship Project on Tuesday, Nov. 4, to hear from two people who think a lot about the power of Big Ag and its negative impacts — Austin Frerick and Sonja Trom Eayrs. They will lead a discussion about the forces threatening our rural communities and how we build the people power to take them on. 

This is an opportunity to take the first steps toward developing the kind of positive future for our communities that builds homegrown wealth, treats people fairly, and is resilient in the long term. If you love something and someone, you fight for it. Come fight with us! 
 
Austin Frerick Biography: Austin Frerick is an expert on agricultural and antitrust policy. In 2024, he published his debut book, Barons: Money, Power, and the Corruption of America’s Food Industry.
 
Sonja Trom Eayrs Biography: Sonja Trom Eayrs, author of Dodge County, Incorporated: Big Ag and the Undoing of Rural America, is a farmer’s daughter, rural advocate, and attorney.

To register for this event, click here.

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