organic matter
Let an agent explain organic matter and its forms, relay its roles in soil, water and carbon cycling from scientific sources, describe measurement, and distinguish organic matter from organic chemistry and organic farming senses.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain organic matter and its forms, relay its roles in soil, water and carbon cycling from scientific sources, describe measurement, and distinguish organic matter from organic chemistry and organic farming senses.
Matter composed of organic compounds derived from living organisms, including living biomass, dead plant and animal residues, humic substances in soils and waters, sediments and fossil organic matter, and natural resins such as copal and kauri gum, as well as organic pigments in the broad sense; organic matter is central to soil fertility, carbon cycling, water quality and the formation of coal and petroleum.
What it is for: Not applicable; a class of material.
It can be explain forms and composition; relay roles in soil and water; relay measurement; distinguish from other senses.
Distinguishing features
Biological origin
Carbon and nutrient store
Decomposition dynamics
Diverse forms
What it looks like
Dark humus in soil, plant litter, resins, dissolved colour in water.
Physical character
soil organic matter carbon content: about 58 percent - conventional factor
typical topsoil organic matter: about 1-6 percent - by mass
How it is recognised
Carbon-based matter from living organisms
Biomass, residues, humic substances, sediment organic matter, copal and kauri gum, organic pigments
Organic chemistry studies carbon compounds broadly; organic farming is a production system
Related models
is a kind of - in registry terms
is a kind of - in registry terms
forms - in soils
drives - as a reservoir
In practice
Families and kinds
living biomass
plant and animal residues and litter
soil organic matter and humic substances
dissolved and particulate organic matter in water
sediment and fossil organic matter such as kerogen
natural resins such as copal and kauri gum
organic pigments including black and brown pigments
Standards and regulation
Soil testing standards such as loss on ignition and Walkley-Black
Water quality standards for dissolved organic carbon
Soil health policies and carbon accounting
Failure modes and hazards
Confusing senses of organic
Contested models of humic substances, with positions attributed
Measurement method differences
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What organic matter is.
Science.
Definition
Definition and forms.
Definition
Definition.
- What is organic matter, and what forms does it take in soils, waters and sediments? definition
- Is the question about organic matter, organic chemistry or organic farming? boundary
Composition
Composition.
Composition
Composition.
- What is organic matter made of, and how do humic substances form and decompose, with models attributed? provenance
- Which entry fits humic substance? action
Roles Roles.
Science.
Soil
Soil fertility.
Soil
Soil.
- How does organic matter support soil structure, fertility and water holding? provenance
- Which references are standard? provenance
Carbon
Carbon cycle.
Carbon
Carbon.
- How does organic matter store and release carbon, and why does it matter for climate? provenance
- Which entry fits soil carbon? action
Measure Measurement and management.
Practice.
Measurement
Measurement.
Measurement
Measurement.
- How is organic matter measured in soil and water? measurement
- Which sources are cited? provenance
Management
Management.
Management
Management.
- How do farmers and land managers build soil organic matter? action
- Which entry fits soil health? action
Context Resins, pigments and fossils.
Context.
Resins
Resins and pigments.
Resins
Resins.
- What are copal, kauri gum and organic pigments, and how are they used? provenance
- Which entry fits the specific material? action
Fossil
Fossil organic matter.
Fossil
Fossil.
- How does organic matter become kerogen, coal and petroleum? provenance
- Which entry fits kerogen? action
What the second pass must settle
- Should soil organic matter and humic substance be separate primary entries?
- How should measurement standards be linked?
- The registry entry has merged aliases naming resins and pigments; should they be split off?