Causes of Soil Salinity
Salt-affected soils are caused by excess accumulation of salts, typically most pronounced at the soil surface. Salts can be transported to the soil surface by capillary transport from a salt laden water table and then accumulate due to evaporation. They can also be concentrated in soils due to human activity, for example the use of potassium as fertilizer, which can form sylvite, a naturally occurring salt. As soil salinity increases, salt effects can result in degradation of soils and vegetation.
Salinization is a process that results from:
- high levels of salt in the water.
- landscape features that allow salts to become mobile(movement of water table).
- climatic trends that favour accumulation.
- human activities such as land clearing, aquaculture activities and the salting of icy roads.
Read more about this topic: Soil Salinity
Famous quotes containing the word soil:
“If the accumulated wealth of the past generations is thus tainted,—no matter how much of it is offered to us,—we must begin to consider if it were not the nobler part to renounce it, and to put ourselves in primary relations with the soil and nature, and abstaining from whatever is dishonest and unclean, to take each of us bravely his part, with his own hands, in the manual labor of the world.”
—Ralph Waldo Emerson (1803–1882)