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Justin Straker, in Developments in Soil Science, 2019. Soil organic matter. Soil organic matter (SOM) provides a renewable reservoir of nutrients required by plants and soil organisms and an energy source for many soil organisms, thus providing the foundation of the soil food web. It also retains water and aids in development of soil aggregates ...
- Soil Quality
Intensive tillage destroys soil aggregates, redistributes...
- Microbial Biomass
Being one of the most labile pools of soil organic matter,...
- Soil Structure
The interaction of organic matter and mineral components of...
- Soil Quality
Soil organic matter (SOM) is the organic matter component of soil, consisting of plant and animal detritus at various stages of ... – in soil science, ...
- 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
Nov 25, 2021 · The chemical structure of soil organic matter has been under debate for many decades and it was previously believed that the non-living component of soil organic matter was made of recognizable plant- or animal-derived biomolecules and humic substances, large by-products that resulted from both biological and chemical decay of organic inputs to soil (Schmidt et al., 2011; Lehmann and Kleber ...
Soil organic matter transformations are a key part of plant nutrition and the ability to achieve good crop yields. Soil organic matter is also an integral part of local and global cycles of carbon, nitrogen and water, impacting many aspects that define the sustainability and future survival of life on earth. Chapter 2 Sources. Allison, F.E. 1973.
The decomposing, or active, fraction consists mainly of recent additions of crop residues and organic manures and has a large impact on biological properties, nutrient cycling, and soil structure. Stable organic matter changes the colour of soil and adds significantly to the active surface area, thereby changing the physical and chemical ...
However, it is important to know that although the soil might appear to have a high organic matter content, this is not completely true. Of more importance is the active soil organic matter, which has already been decomposed to some degree and actively contributes to the soil properties, such as in CEC and physical aggregation.
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Soil organic matter is plant, animal, and microbial residues in various states of decomposition; it is a critical ingredient — in fact the percentage of soil organic matter in a soil is among ...
