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Soil salinity. Soil salinity is the salt content in the soil; the process of increasing the salt content is known as salinization. Salts occur naturally within soils and water. Salination can be caused by natural processes such as mineral weathering or by the gradual withdrawal of an ocean. It can also come about through artificial processes such as irrigation
Dryland salinity. Causes of dryland salinity. Salinity problems in the soil and surface water bodies occur when more water enters the groundwater system (through a process called recharge) than is discharged from the system. This imbalance causes the water table to rise.ryland salinity is essentially a water balance problem, since it is the movement of water that controls salt transport. Excess recharge into groundwater stores causes water tables to rise, carrying dissolved salts to the surface. Salinity management, therefore, focuses on reducing groundwater recharge.