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Organic matter component of soil
researchgate.net
- Soil organic matter (SOM) is the organic matter component of soil, consisting of plant and animal detritus at various stages of decomposition, cells and tissues of soil microbes, and substances that soil microbes synthesize.
en.wikipedia.org/wiki/Soil_organic_matter
Soil organic matter (SOM) is the organic matter component of soil, consisting of plant and animal detritus at various stages of decomposition, cells and tissues of soil microbes, and substances that soil microbes synthesize.
- CO 2, CO 32−, HCO 3−, CH 4, C
- H 2 PO 4−, HPO 42−
- NH 4+, NO 2−, NO 3−, N 2 (gas), N 2 O (gas)
- S, H 2 S, SO 32−, SO 42−, CS 2
Soil organic matter (SOM) can be defined as organic materials found in soil that are, or have been, part of living organisms. It is a continuum of materials at various stages of transformation due to biotic and abiotic processes.
Nov 25, 2021 · Define soil organic matter and list its main components. Evaluate the importance of organic matter on soil physical, chemical and biological properties and processes. Explain the sources and turnover processes of soil organic matter. Discuss the spatial distribution and land management of soil organic matter.
Soil organic matter is the key to building and maintaining healthy soils because it has such great positive influences on essentially all soil properties—aggregation, nutrient availability, soil tilth and water availability, biological diversity and so on— helping to grow healthier plants.
- What is Soil Organic Matter?
- Benefits of Stable Soil Organic Matter
- Physical Benefits
- Chemical Benefits
- Biological Benefits
- Organic Materials
Organic matter is made up of different components that can be grouped into three major types: Plant residues and living microbial biomass. Active soil organic matter also referred to as detritus. Stable soil organic matter, often referred to as humus. The living microbial biomass includes the microorganisms responsible for decomposition (breakdown)...
There are numerous benefits to having a relatively high stable organic matter level in an agricultural soil. These benefits can be grouped into three categories:
Enhances aggregate stability, improving water infiltration and soil aeration, reducing runoff. Improves water holding capacity. Reduces the stickiness of clay soils making them easier to till. Reduces surface crusting, facilitating seedbed preparation.
Increases the soil’s CEC or its ability to hold onto and supply over time essential nutrients such as calcium, magnesium and potassium. Improves the ability of a soil to resist pH change; this is also known as buffering capacity (see Agronomy Fact Sheet #5). Accelerates decomposition of soil minerals over time, making the nutrients in the mineral...
Provides food for the living organisms in the soil. Enhances soil microbial biodiversity and activity which can help in the suppression of diseases and pests. Enhances pore space through the actions of soil microorganisms. This helps to increase infiltration and reduce runoff.
Over time, the application and incorporation of organic materials can result in an increase in stable soil organic matter levels. Sources of organic materials include: Crop residues. Animal manure. Department of Crop and Soil Sciences 1 College of Agriculture and Life Sciences Compost (Figure 1). Cover crops (green manure) Perennial grasses and ...
Soil organic matter means all living, or once-living, materials within, or added to, the soil. This includes roots developing during the growing season, incorporated crop stubble or added manures and slurries.
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publications. Soil Organic Matter Does Matter. (SF1942, Nov. 2019) Publication File: Soil Organic Matter Does Matter. This publication talks about soil organic matter and its classifications and benefits. It also describes how to build organic matter and how it is destroyed. Lead Author: Caley Gasch, Assistant Professor of Soil Health, NDSU.
