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Sigma KEE - Humus
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Humus
Humus is decaying organic matter found in Soil and derived from dead animal and plant material.
Relationships      
Parents Mixture A Mixture is two or more PureSubstances, combined in varying proportions - each retaining its own specific properties. The components of a Mixture can be separated by physical means, i.e. without the making and breaking of chemical bonds. Examples: Air, table salt thoroughly dissolved in water, milk, wood, and concrete.


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