1st March 2019, 1:33 AM
Quote:Learning about salinization is important because it damages approximately one-tenth of the world’s irrigated land and reduces irrigated land areas by 1-2% each year. Salinization occurs where arid or semi-arid soil is present. In areas that experience an ample amount of rainfall, the development of saline soil is hindered due to leaching, which is the downward movement of salts.
Salinization may be caused by either natural processes or because of human practices. The presence of soluble salts (such as sulfates of sodium, calcium, and magnesium), a high water table, a high rate of evaporation, and low annual rainfall are conditions that are necessary for the formation of salinization. Some natural landscape features allow dissolved salts to accumulate in water. Once this water evaporates, the salt concentration consequently increases. Thus, salinization can occur this way as well.
Other natural sources of salts in soil include the decomposition of rocks and minerals to do my chemistry homework through chemical weathering. Nearly all types of water (with the exception of natural rainfall) contain dissolved salts. Once plants use the water, they leave the salt content behind, allowing it to accumulate in the soil. The restriction of adequate water drainage within the soil can also contribute to salinization. This is because the water will eventually evaporate, leaving the salts behind to accumulate. Areas with irrigation are also vulnerable to salinization, for a higher water table carries salts to the surface because of high evaporation demand.
Although potentially destructive, there are several ways to prevent and correct salinization. Provided that there is sufficient natural drainage, it might help to use a bit more water than plants actually need. This would reduce the salt concentration by leaching salts past the root zone and into the aquifers, which would then wash away the unwanted salinity.
What is the source of the information? I've been searching for the Chemistry research (chemical weathering) related materials and found this topic and your reply.
