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Scope of Soil Science




Soil Science has six well defined and developed disciplines. Scope of soil Science is reflected through these disciplines.

Soil Science : The science dealing with soil as a natural resource on the surface of the earth, including Pedology (soil genesis, classification and mapping) and the physical, chemical and biological and fertility properties of soil and these properties in relation to their management for crop production.

  1. Soil fertility: Nutrient supplying properties of soil

  2. Soil chemistry: Chemical constituents, chemical properties and the chemical reactions

  3. Soil physics: Involves the study of physical properties

  4. Soil microbiology: deals with micro organisms, its population, classification, its role in transformations

  5. Soil conservation: Dealing with protection of soil against physical loss by erosion or against chemical deterioration i.e. excessive loss of nutrients either natural or artificial means.

  6. Pedology: Dealing with the genesis, survey and classification

 

Soil can be compared to various systems of human body

Digestive    – matters decomposition 
Respiratory – air circulation & exchange of gases 
Circulatory – water movement with in the soil system 
Excretory   – leaching out of excess salts 
Brain         – soil clay 
Colour       – soil colour 
Height       – soil depth

Components of Soil (Volume basis)

Mineral matter – 45% 
Organic matter – 5% 
Soil water – 25% 
Soil air – 25%

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