There are many effective ways for improving salt-affected land, such as water leaching,
chemical remediation
and phytoremediation. The remediation of salt-affected soil using chemical agents, including gypsum (CaSO4. 2H2O), calcite (CaCO3), calcium chloride (CaCl2.
How do you remediating the effects of soil salinization?
Soil salinity can be reversed, but it takes time and is expensive. Solutions include
improving the efficiency of irrigation channels, capturing and treating salty drainage water, setting up desalting plants
, and increasing the amount of water that gets into aquifers. Mulches to save water can also be applied to crops.
How do you remove salinity from soil?
River water or groundwater used in irrigation contains salts, which remain behind in the soil after the water has evaporated. The primary method of controlling soil salinity is to permit 10-20%
of the irrigation water to leach the soil
, that will be drained and discharged through an appropriate drainage system.
- Optimize irrigation (reduce salty water usage, implement drip irrigation, use desalinated, recycled, rain-harvested water, and don’t overirrigate).
- Add organic matter and manure to keep moisture and reduce irrigation.
What is the process of salinization?
Salinization is the
process by which water-soluble salts accumulate in the soil
. Salinization is a resource concern because excess salts hinder the growth of crops by limiting their ability to take up water. Salinization may occur naturally or because of conditions resulting from management practices.
Is soil salinity good or bad?
Although increasing soil solution salinity has a
positive effect
on soil aggregation and stabilization, at high levels salinity can have negative and potentially lethal effects on plants. As a result, salinity cannot be increased to maintain soil structure without considering potential impacts on plant health.
What do you know about soil erosion?
In this process,
the soil particles are loosened or washed away in the valleys, oceans, rivers, streams or far away lands
. This has been worsening due to human activities such as agriculture and deforestation. Soil erosion is a continuous process that occurs either slowly or at an alarming rate.
What are the causes and effects of salinity?
Salinity affects
production in crops, pastures and trees by interfering with nitrogen uptake
, reducing growth and stopping plant reproduction. Some ions (particularly chloride) are toxic to plants and as the concentration of these ions increases, the plant is poisoned and dies.
What problems does salinity cause?
Salinity affects: farms – salinity can
decrease plant growth and water quality
resulting in lower crop yields and degraded stock water supplies. Excess salt affects overall soil health, reducing productivity. It kills plants, leaving bare soil that is prone to erosion.
How do you stop salinity?
- avoiding over-irrigation by monitoring soil moisture to work out water requirements.
- good crop selection such as using deep-rooted plants to maximise water extraction.
- minimising fallow periods using crop rotations and break crops.
- avoiding deep ripping and overtillage to minimise infiltration of water.
What is soil salinity and what causes it?
Soil salinity is the salt content in the soil; the process of increasing the salt content is known as salinization. … 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 and road salt.
How is high salinity in water treated?
As the researchers explain in their study, there are two main ways to desalinate salt water. One way is to
remove pure water molecules from the salt water
, as done in distillation and reverse osmosis, particularly for water with a high salt concentration.
Why has salinity increased?
Evaporation of ocean water and formation of sea ice
both increase the salinity of the ocean. However these “salinity raising” factors are continually counterbalanced by processes that decrease salinity such as the continuous input of fresh water from rivers, precipitation of rain and snow, and melting of ice.
Does salt make land infertile?
Large quantities of the salts dissolved in the water, such as sodium and chloride, are diffused into the soil and remain there after the water has evaporated. The
salt stunts the crops and can even make soils infertile in the long run
. … And that is for a reason: “Our crop plants are the result of many years of breeding.
How do humans affect salinity?
Human activities can cause salinization
through the use of salt-rich irrigation water
, which can be exacerbated by overexploitation of coastal groundwater aquifers causing seawater intrusion, or due to other inappropriate irrigation practices, and/or poor drainage conditions.
What are the causes of salinization and alkalinization?
The sources of ions including carbonate and sulfate are
weathering of rock and soil parent material, atmospheric deposition, and groundwater
. Weathering occurs through the action of water and dissolved CO2 on minerals.
