Aquaculture Engineering (2+1)

Soil and its properties - Unified soil classification

Unit 3- Soil and its properties

Soil and its properties
Classification of Soil - Unified soil classification and IS classification system
According to this classification soil may be classified into three groups.

a) Coarse grained soils
In these soils more than half of the total material by mass is larger than 75 micron I.S. sieve size.

b) Fine grained soils
In these soils more than half of the material by mass is smaller than 75 micron I.S. sieve size.

c) Highly organic and other miscellaneous soil material
These soils contain large percentage of fibrous organic matter such as peat and particles of decomposed vegetation. In addition certain soils containing shells, concretions, cinders and other non soil materials in sufficient quantities are also grouped in this system (Division) Coarse grained soils are sub-divided into two sub groups.