Editing Humus (section)

==External links==
{{sister project links |wikt=humus |b=no |q=humus |s=no |commons=no|n=no|v=no |species=no}}
*{{cite web |url=http://karnet.up.wroc.pl/~weber/typy2.htm |first=Jerzy |last=Weber |title=Types of humus in soils |publisher=Agricultural University of Wroclaw, Poland |access-date=8 December 2024 }}
*{{cite web |last1=Wershaw |first1=Robert L. |title=Evaluation of conceptual models of natural organic matter (humus) from a consideration of the chemical and biochemical processes of humification |url=https://pubs.usgs.gov/sir/2004/5121/pdf/sir2004-5121.pdf |work=Pubs.USGU.gov |publisher=[[United States Geological Survey]] |access-date=8 December 2024 }}
*{{cite web |url=https://humic-substances.org/ |title=What are humic substances? |publisher=[[International Humic Substances Society]] |access-date=8 December 2024 }}

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[[Category:Composting]]
[[Category:Soil improvers]]
[[Category:Soil science]]
[[Category:Organic farming]]
[[Category:Types of soil]]