Inorganic amendments

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1. Soil additives such as sand or calcined clay that are not carbon-based, used to improve physical and chemical properties of soil including drainage and retention of water and nutrients. See also organic amendments.

sand2-b.jpg

This is an example of an inorganic amendment. It is sand.
Source: http://generalhorticulture.tamu.edu/h202/labs/lab7/inorganic.html

calcinedclay-b.jpg

This is another example and it is calcined clay.
Source: http://generalhorticulture.tamu.edu/h202/labs/lab7/inorganic.html