Unclassified
Humus
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Unclassified
Humus
Organic matter in soils resulting from decay of plant and animal materials
epic · Q172645
Related cards · organic matter
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Food
Honey
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Unclassified
Bitumen
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Meta topics
Bakelite
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Unclassified
Guano
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Unclassified
Human feces
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Unclassified
Liquefied natural gas
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