Conventional wisdom holds that the best solution to dealing with the twin menace of salinity and waterlogging, is to
maintain a net flux of salt away from the rootzone and to control the watertable by means of artificial drainage
.
How can waterlogging and salinity problems be overcome?
Bio-drainage
, in which excess groundwater is removed from the soils by tree plantations by transpiration can be a feasible option. They can prevent the flow of saline drainage water into the river and restore the salinity levels in the river waters to the original natural levels of less than 250 mg/l.
How we can overcome water logging?
Organic matter,
such as leaf mold or manure, added to the soil
will help absorb moisture from your garden. At the same time, it provides valuable, rich nutrients that will keep working for your plants in the off-season. Consider areas that include the use of raised flower beds.
How do you overcome salinity problems?
- Increase drainage for better flushing (to remove salts from the ground surface).
- Plant salt-tolerant crops to manage economic risks and to ensure land cover.
- Remove salt crystals from the surface mechanically.
- Restore the balance via chemical amendments (e.g., gypsum or sulfuric acid).
What is water logging and its effect?
Waterlogging
affects a number of biological and chemical processes in plants and soils that can affect crop growth in the short and long term
. … Waterlogging (flooded/ponded/saturated soils) affects a number of biological and chemical processes in plants and soils that can affect crop growth in the short and long term.
What causes waterlogging?
Waterlogging is caused by a
combination of excess rainfall (for the site)
, poor external drain- age (runoff), poor internal drainage (water movement in the soil profile) and the inability of the soil to store much water.
What problems does salinity cause?
Salinity not only decreases the agricultural production of most crops, but also, effects soil physicochemical properties, and ecological balance of the area. The impacts of salinity include—
low agricultural productivity, low economic returns and soil erosions
, (Hu and Schmidhalter, 2002).
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.
How is high salinity in water treated?
It also requires considerable pretreatment for maintenance and preventing membrane fouling, thereby rendering it unattractive for heavily contaminated produced water brine. Instead,
thermal distillation and vapor compression
are current technology options in high salinity brine treatment.
What is waterlogging short answer?
Waterlogging occurs when
there is too much water in a plant’s root zone
, which decreases the oxygen available to roots. Waterlogging can be a major constraint to plant growth and production and, under certain conditions, will cause plant death.
What is water logging and salinity?
The combined salinity and waterlogging have more harmful effects on
crop growth
and yield than the individual effect. Waterlogging causes plants to become shallow-rooted, which results in salinization as salts move up because of capillary action that eventually makes the land inappropriate for agriculture.
What are the characteristics of waterlogged soil?
A waterlogged soil is
one which is saturated and all the voids (pores) in are filled with water
. A soil is unsaturated when part of it is filled with water and part with air. Water in the soil is also called soil moisture.
How do you fix waterlogged soil?
- Plant Cover Crops. Cover crops are an excellent way to use excess water. …
- Go No-Till. A more long term strategy, going no -till improves soil structure to help with drainage. …
- Add Organic Material. …
- Subsoil. …
- Build Raised Beds. …
- A Note About Sand.
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 does salinity do to water?
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.
What are some examples of salinity?
Salts generally found in saline soils include
NaCl (table salt), CaCl2, gypsum (CaSO4), magnesium sulfate, potassium chloride and sodium sulfate
. The calcium and magnesium salts are at a high enough concentration to offset the negative soil effects of the sodium salts. The pH of saline soils is generally below 8.5.
