is dirt prokaryotic or eukaryotic

I'm not a science guy by training, but I've pieced this together from a lot of reading and it's worth laying out clearly.

Every living thing you can see with your naked eye is eukaryotic. Plants, animals, insects, fungi, you, eukaryotic. Eukaryotic cells have a membrane with a nucleus inside, and that nucleus contains DNA organized into chromosomes. That DNA is fixed, it defines what the cell does, what protein it makes, what function it serves. It's a closed, organized package of genetic information.

Prokaryotic organisms, bacteria and archaea, are fundamentally different. They're smaller. They have no nucleus. Their DNA floats free in the cell, a single loop of genetic material. And here's the thing that makes them extraordinary: prokaryotes share DNA laterally, across different organisms. A bacterium can take up genetic material from its environment and incorporate it. Horizontal gene transfer. It's how bacteria evolve in hours rather than generations. Research has confirmed that HGT occurs even under typical soil moisture conditions, with bacteria acquiring new genetic material within 24 hours of inoculation (Steele et al., bioRxiv, 2021).

This means prokaryotes are adaptive in a way that nothing eukaryotic is. They can respond to changes in their environment, soil chemistry, pH, available nutrients, at a speed that no plant, animal, or fungus can match.

Soil contains both types. Bacteria and archaea are the prokaryotes, numbering in the billions per teaspoon of healthy soil. Fungi, protozoa, nematodes, and everything larger are eukaryotes. And the relationship between these two domains of life is what makes the soil food web work.

Bacteria are the first processors. They break down fresh organic matter, fix atmospheric nitrogen, release phosphorus from mineral forms, and produce the sticky polysaccharides that bind soil particles into aggregates. They're fast. They multiply quickly. They're flexible because of that horizontal gene transfer, constantly adapting to whatever organic material arrives in the soil.

Fungi are the engineers. They grow slow, building networks of hyphae that thread through soil for feet or even miles. Their networks connect plant roots to mineral reserves far beyond what roots can reach on their own. In exchange for plant-exuded carbon sugars, fungi deliver minerals and nutrients directly to root cells. This mycorrhizal trade is at least 450 million years old, many plants literally can't grow properly without it.

Protozoa and nematodes eat bacteria and release the nutrients locked inside them in forms plants can directly absorb. Earthworms consume organic matter and microbial biomass at scale, passing it through their digestive systems and producing casts that are among the most plant-available nutrient sources in nature.

Everything connects. The prokaryotes break things down. The eukaryotes process and distribute. The plants feed on what the whole system produces. This is the decay cycle in action, the biological machinery that Albert Howard identified and documented, that Gabe Brown has spent his career honoring on his North Dakota farm.

Our food systems have been systematically disrupting prokaryote populations, the bacteria, through synthetic nitrogen fertilizers, pesticides, tillage, and other practices.

When you add soluble synthetic nitrogen to soil, you eliminate the reason for bacteria to work to unlock nitrogen from organic matter. The evolutionary pressure that drives prokaryotic adaptation toward nitrogen cycling gets reduced. Over time, the bacterial community shifts, species that thrive under high-nitrogen conditions dominate, and the diverse community that supports the full range of soil functions gets impoverished. Twelve years of chemical nitrogen fertilizer application was found to significantly decrease bacterial diversity through soil acidification (Zhu et al., Frontiers in Microbiology, 2022).

Pesticides, including herbicides and fungicides, directly kill soil organisms, sometimes by design and sometimes as collateral damage. Tillage physically destroys fungal networks and exposes billions of bacteria to oxygen and UV conditions they can't survive.

What's happened as a result is that we've basically taken the prokaryotic engine partly out of the agricultural equation. And the DNA that was being constantly refreshed and adapted through horizontal gene transfer to fit our environment is no longer doing that work. Our food system has become biologically impoverished in ways we're only beginning to measure.

When you pick up a handful of living soil and compare it to dead dirt, the difference you're seeing is largely a difference in prokaryote populations.

Living soil has active, diverse bacterial communities. You can sometimes smell them, that earthy smell of healthy soil is largely due to a compound called geosmin produced by actinomycetes, a type of soil bacteria. The presence of aggregates, those loose, crumbly clumps, is the physical evidence of bacterial activity. Aggregates form because bacteria produce extracellular polymeric substances that bind soil particles together.

Dead dirt has fewer bacteria, less diversity, less activity. It's tighter, denser, grayer. Water doesn't penetrate it well because the pore structure that bacterial activity creates isn't there. It smells like nothing much, or like the chemistry that's been applied to it.

The good news is that prokaryotes are extraordinarily resilient. When you stop suppressing them and start feeding them, with compost, with organic matter, with cover crops, they come back fast. They multiply fast. They adapt fast. That's the advantage of being prokaryotic. Given half a chance, the biology rebuilds.

You don't need a microbiology degree to use this knowledge. The practical implication is simple: treat your soil like the living biological system it is, with billions of prokaryotic organisms that need organic carbon as their food source.

Add compost. Finished compost is essentially a living inoculant, teeming with both prokaryotic and eukaryotic organisms ready to colonize your soil. When you top-dress your beds with compost, you're seeding a new generation of bacteria and fungi and everything that feeds on them.

Minimize tillage. Every time you deeply till soil, you're disrupting the prokaryotic community, physically breaking up bacterial colonies, exposing them to hostile surface conditions, destroying the fungal networks they work alongside.

Stop using synthetic fertilizers. Not because they're evil, but because they undercut the reason for bacteria to do their work. Let the prokaryotes run the nitrogen cycle the way they've been doing it for three billion years.

Your garden is full of prokaryotic bacteria doing work that no synthetic product can replicate. That changes how you approach the whole thing.