Final answer:
The different types of soil salinity are primary salinity, secondary salinity, and tertiary salinity. Primary salinity occurs naturally in soils, secondary salinity is caused by human activities such as irrigation, and tertiary salinity happens in areas with naturally occurring high salinity in groundwater.
Step-by-step explanation:
The different types of soil salinity are primary salinity, secondary salinity, and tertiary salinity.
- Primary salinity: This type of salinity occurs naturally in soils where there is a high concentration of salts in the parent material that the soil is derived from.
- Secondary salinity: This type of salinity is caused by human activities such as irrigation. Over time, the salts in the water used for irrigation build up in the soil, leading to elevated salinity levels.
- Tertiary salinity: This type of salinity occurs in areas where there is naturally occurring high salinity in the groundwater. When the groundwater is extracted for irrigation, the salt concentration increases in the soil.