Organic Material Organic Material Studying Pedons Organic material accumulates in wet places where it is deposited more rapidly than it decomposes. These deposits are called peat. This peat in turn may become parent material for soils. Many deposits of organic material are mixtures of peat. Some organic soils formed in alternating layers of different kinds of peat.
Some organic soils contain layers that are largely or entirely mineral material.
Descriptions of organic material should include the origin and the botanical composition of the material to the extent that these can be reasonably inferred.