Healthy soil is not just dirt – it’s a living ecosystem.
The Living Network Beneath Your Plants
“Plants cannot thrive in sterile soil. As soil biology pioneer Dr. Elaine Ingham explains, the soil food web is ‘the complex community of bacteria, fungi, protozoa, nematodes, and microarthropods that cycle nutrients, protect plants, and build soil structure’. In other words, beneath every garden is a food web of tiny organisms working together. Plants feed this web with root exudates (sugars and proteins), and the microbes in turn feed the plants by releasing nutrients in usable forms. When this web is active, plants are stronger and less dependent on external inputs.”(for the quote on the soil food web, and which mentions clean air/water/healthy plants.)
How It Works
“Roots of plants exude carbohydrates and organic compounds into the soil. Bacteria and fungi consume these exudates and organic matter, multiplying around the roots. Protozoa and nematodes then graze on those microbes: when they eat bacteria/fungi, they release nitrogen and other nutrients in plant-available forms. Larger organisms like microarthropods and earthworms fragment organic debris, improving soil structure and aeration. As nutrients cycle through these relationships, the soil becomes more fertile and resilient. In this way, living soil feeds the plant, and the plant feeds the soil in return, creating a natural cycle of life.”
Dr. Elaine Ingham and the Soil Food Web
Dr. Elaine R. Ingham is a soil microbiologist whose work has played an important role in bringing Soil Food Web thinking into modern agricultural education. She is one of the authors of the USDA Natural Resources Conservation Service Soil Biology Primer, alongside Andrew R. Moldenke and Clive A. Edwards. The Primer explains how the living component of soil influences nutrient cycling, decomposition, soil structure and plant growth. Ingham was also a co-author of an influential 1985 study examining interactions among bacteria, fungi and nematode grazers. In controlled soil microcosms, plants grown with bacteria plus bacterial-feeding nematodes initially grew faster and absorbed more nitrogen than plants grown with bacteria alone. The researchers linked this response to increased nitrogen mineralisation and the release of ammonium by nematodes.
The broader lesson is not that one organism controls healthy soil. It is that relationships among organisms matter.
A functioning soil ecosystem contains producers, decomposers, grazers and predators interacting with roots, organic matter, air, water and minerals.
Soil Organism And Their Role
Four Principles for Living Soil
Keep Living Roots
Living roots continuously feed the rhizosphere and help maintain biological activity.
Minimise Disturbance
Excessive tillage and physical disturbance can damage soil structure and organism habitat.
Keep the Soil Covered
Plants, residues and mulch protect the soil surface and provide habitat and organic inputs.
Build Diversity
A greater variety of plants and organic inputs supports a more diverse food-web community.
Where Does OHN Fit?
OHN is one botanical input within Korean Natural Farming.
It should not be presented as a replacement for:
• Living roots
• Organic matter
• Soil cover
• Biological diversity
• Sound irrigation
• Balanced soil management
Instead, Seon Bio sees OHN as one part of a wider biology-first routine.
