Biological Properties
Microorganisms
Microorganisms are very small forms of life that can sometimes live as single cells, although many also form colonies of cells. A microscope is usually needed to see individual cells of these organisms.
Macro Fauna
While the most well‐known nematodes are pests occupying and feeding on plant roots (such as the lesion nematode and the soybean cyst nematode), in fact most nematodes are beneficial organisms. Nematodes are extremely important because they consume a diverse array of food sources, which places them at multiple trophic levels in the soil food web.
Particulate Organic Matter
Particulate organic matter (POM) fraction referred to in this document comprises all soil organic matter (SOM) particles less than 2 mm and greater than 0.053 mm in size (Cambardella and Elliot, 1992). POM is biologically and chemically active and is part of the labile (easily decomposable) pool of soil organic matter (SOM).
Total Organic Carbon
Total organic carbon (TOC) is the carbon (C) stored in soil organic matter (SOM). Organic carbon (OC) enters the soil through the decomposition of plant and animal residues, root exudates, living and dead microorganisms, and soil biota.
Soil Enzymes
Soil enzymes increase the reaction rate at which plant residues decompose and release plant available nutrients. The substance acted upon by a soil enzyme is called the substrate.
Soil Respiration
Carbon dioxide (CO2) release from the soil surface is referred to as soil respiration. This CO2 results from several sources, including aerobic microbial decomposition of soil organic matter (SOM) to obtain energy for their growth and functioning (microbial respiration), plant root and faunal respiration, and eventually from the dissolution of carbonates in soil solution.
Soil Health Conference Registration Open!
The 2025 Soil Health Conference will be held Jan. 15-16 at the Ramkota Hotel and Event Center in Watertown, a spacious venue which will allow for a full day and a half of speaker sessions, awards, producer panels, and time to engage with sponsors. This event will feature many speakers including Keith Berns, Nebraska no-till farmer, ag educator, and co-owner of Green Cover Seed; Paul Jasa, noted Extension egineer at University of Nebraska-Lincoln; Dr. Jon Lundgren, Ecdysis Foundation executive director and CEO of Blue Dasher Farm; and Joe Breker, an award-winning North Dakota producer who has been using regenerative agriculture practices for over 40 years!
News & Events
New website helps consumers connect with local producers
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Regenerative ag: Making room for the next generation
By Stan Wise South Dakota Soil Health Coalition There are many reasons for producers and landowners to adopt regenerative land management practices, but few are as important as the prospect of bringing a new generation into a farming or ranching operation. When Barry...
Regenerative ag pioneer to present workshop in Fort Pierre
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