America’s Fertility Problem Is Bigger Than Fertilizer

Commentary

Cornell University recently released a study with a startling conclusion: The United States already produces enough recoverable nutrients from human waste, animal manure, and food waste streams to theoretically replace all synthetic nitrogen fertilizer currently used in American agriculture.

The researchers found that existing waste streams could supply roughly 102 percent of the nitrogen needs of U.S. farmland if those nutrients were properly captured, processed, and redistributed. Their conclusion was not that America lacks fertility, but that America lacks the infrastructure and coordination to move that fertility where it is needed.

In other words, the problem is not resource scarcity. The problem is logistics.

What struck me most about the study was not simply the amount of waste being discarded, but the assumptions underneath the conversation itself. The study asks whether we can convert enough waste into fertilizer to continue feeding our current agricultural system.

But regenerative agriculture asks a deeper question.

What if the issue is not whether we have enough fertilizer, but whether we have enough functioning biology to unlock the fertility that already exists?

It never occurred to me that there “wasn’t enough nitrogen” available naturally. Many regenerative soil scientists and agronomists argue that most soils already contain enormous reservoirs of nutrients. The issue is not necessarily absence. The issue is availability.

Conventional agriculture often approaches fertility like a chemistry equation. The soil is tested for available nitrogen, phosphorus, and potassium. If those numbers are low, inputs are added. Biological farming systems increasingly see fertility as a living ecosystem process rather than a simple chemical inventory.

Healthy soils are not just dirt holding nutrients. They are living communities of bacteria, fungi, protozoa, worms, insects, roots, and organic matter participating in a constant cycle of exchange. Nitrogen exists in organic matter, crop residues, manure, microbes, and even the atmosphere itself. Phosphorus often already exists in the soil but is chemically bound in forms that plants cannot access. Biology unlocks it.

Mycorrhizal fungi extend the root systems of plants. Nitrogen-fixing bacteria pull nitrogen from the air. Microbes solubilize phosphorus. Grazing animals cycle nutrients through manure and urine. Cover crops protect and feed microbial life while pumping carbon into the soil.

The more I learn about regenerative systems, the more I wonder if the real tragedy is not nutrient scarcity, but broken nutrient cycling.

Synthetic nitrogen is often unstable. It is applied in highly soluble forms that can volatilize into the atmosphere, leach into waterways, and disrupt microbial relationships underground. Many regenerative farmers observe that dependence on synthetic fertilizer weakens the natural cycling systems that healthy soil depends on.

Regenerative agriculture aims to build stable fertility year after year.

Instead of pouring fertility into the soil, the goal becomes to grow fertility within the soil through organic matter, living roots, cover crops, livestock integration, reduced tillage, fungal recovery, and microbial health.

I believe part of the logistical nightmare Cornell identified comes from how separated our food system has become. We now have regions that are almost entirely devoted to grain production and others that are heavily concentrated in protein production. Fruits and vegetables are often grown somewhere else entirely. Fertility must then be shipped long distances because the natural cycle has been geographically broken apart.

Mixed farms historically solved much of this naturally.

When livestock and crops exist together, manure becomes fertilizer close to where fertility is needed. Crop residues feed animals. Animals feed soil biology. Soil biology feeds crops. The fertility loop tightens.

“On farm fertility” is a phrase often used in regenerative agriculture circles, but what could be more abundant than fertility generated directly from your own ecosystem? A well of fertility that comes from your livestock, your cover crops, your microbial life, and eventually from a soil system that continuously regenerates itself through healthy biological cycling.

But there is another concern that almost never gets discussed honestly in these conversations.

We already know pharmaceuticals are making their way through municipal water systems. Studies have shown traces of antidepressants, hormones, antibiotics, birth control compounds, and other medications persisting through wastewater treatment systems and entering waterways. If we dramatically scale the use of human waste streams in agriculture, we also have to ask what else may be entering the soil alongside the nutrients.

The same concern exists within organic agriculture itself.

While organic agriculture is often far better than conventional systems, there is a contradiction within the standards that deserves more attention. Organic farming does not require that the manure used as fertilizer come from organic operations. Much of the manure spread on organic fields originates from large-scale confinement systems where antibiotics, pharmaceuticals, pesticides, herbicides, and other chemical inputs are commonly used upstream in the system.

In other words, the fertility source itself is often not truly clean.

I experienced this contradiction personally in California. I lost the organic certification on my laying hens because we used free leftover straw from a pumpkin patch to bed the nesting boxes. Yet manure from highly industrialized confinement operations can legally be spread on certified organic farmland.

A chicken cannot lay eggs on non-organic straw, but the fertility of the field can come from systems saturated with pharmaceuticals and chemical inputs.

That contradiction says a lot about how disconnected our regulatory systems have become from biological reality.

When we discuss replacing synthetic fertilizers with recycled waste streams, we also need to ask what exactly we are recycling. Nutrients do not move alone. Modern waste streams can carry residues from the systems that produced them.

The more we look into the logistical challenges of transporting massive quantities of waste around the country, the more obvious it becomes that diversified regional farming systems may ultimately be the healthiest path forward.

Operations where crops and livestock coexist naturally cycle fertility close to where it is needed. Manure stays on the farm. Nutrients remain in the local ecosystem. Water cycles improve. Animals participate in the biological function of the land itself. Dependency on distant inputs declines.

The farther fertility has to travel, the greater the opportunities for contamination, inefficiency, waste, and ecological disconnection.

Cornell’s study proves there is enough waste to replace synthetic fertilizer. But perhaps regenerative agriculture points toward a bigger insight. Maybe the future is not simply replacing one fertilizer source with another. Maybe the future is rebuilding farms and landscapes where fertility becomes increasingly self-renewing, biologically stable, locally generated, and deeply connected to the land producing the food.

Nature rarely creates waste. It creates cycles.

The real question may not be whether America has enough fertilizer.

The real question may be whether we are willing to rebuild the biological systems that make fertility abundant in the first place.

Views expressed in this article are the opinions of the author and do not necessarily reflect the views of The Epoch Times.