Why do some croplands suffer from excessive soil salinity?

Answers

Answer 1
The excessive use of water for irrigation in dry climates, with heavy soils, causes salt accumulation because they are not washed out by rainfall. The practice of waterlogging without adequate drainage has also become a serious cause of soil salinization .
Answer 2
Factors such as sea level rise, drought, usage of poor quality groundwater for irrigation and improper usage of fertilizers and pesticide has led to the soil become salt-affected. Salinization of farmland and limited fresh water access is threatening global food security and the livelihood of many farmers.
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 and road salt. 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. Salinity becomes a problem when enough salts accumulate in the root zone to negatively affect plant growth. Excess salts in the root zone hinder plant roots from withdrawing water from surrounding soil. This lowers the amount of water available to the plant, regardless of the amount of water actually in the root zone. If the level of salts in the soil water is too high, water may flow from the plant roots back into the soil. This results in dehydration of the plant, causing yield decline or even death of the plant. Crop yield losses may occur even though the effects of salinity may not be obvious. The excessive use of water for irrigation in dry climates, with heavy soils, causes salt accumulation because they are not washed out by rainfall. ... The practice of waterlogging without adequate drainage has also become a serious cause of soil salinization.

Related Questions

The enzyme maltase will break down the sugar maltose into which of the following components?

Answers

Answer:

Hsksjks

Explanation:

Jsksjsossjs

What are organism that break down dead organism called

Answers

Answer:

Decomposers

Explanation:

Answer:

Decomposers

Explanation:

they get energy by eating them

A celestial body orbits the Sun. It consists of rock and ice. As it passes close to the Sun, the body forms a long tail of dust. Which body best matches this description?
A.
asteroid
B.
comet
C.
dwarf planet
D.
planet

Answers

the answer should be B. comet
B . Comet is the correct answer

Which part of cell division is different in plant and animal cells?
cytokinesis
anaphase
mitosis
eukaryotic

Answers

Cytokinesis is the process in which the cytoplasm of a single eukaryotic cell is divided to form two daughter cells. It begins during anaphase and is completed at the end of telophase. Animal cells divide by a cleavage furrow. Plant cells divide by a cell plate that eventually becomes the cell wall.

Answer:

A (cytokinesis)

Explanation:

EDGE 2020

ZoneZ_Faze XBL on YT

Describe the resulting cells of meiosis

Answers

Answer:

Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. The process results in four daughter cells that are haploid, which means they contain half the number of chromosomes of the diploid parent cell.

Explanation:

Hope ths helps u

Crown me as brainliest:).

EASY HELP ME Which of the following would be true of a Charophycean type plan
a. They had seeds.
b. They lived in water.
c. They were mosses
d. They were vascular

Answers

Answer:

C

Explanation:

They in fact were mosses and mosses by definition dont have seeds or vascular and Charophycean type plants dont live in water

the answer to this question is C

If a person did not eat for several days, which sequence of events would occur? Glycogen stores would be depleted first, then structural proteins, and then stored lipids. Lipid stores would be depleted first, then stored glycogen, and then structural proteins. Proteins stores would be depleted first, then stored lipids, and then stored glycogen. Glycogen stores would be depleted first, then stored lipids, and then structural proteins.

Answers

Answer:

The correct answer is "Glycogen stores would be depleted first, then stored lipids, and then structural proteins."

Explanation:

When an individual starts starving, the glycogen store is depleted first because that is the storage form of glucose. After depletion of the glycogen, the body then burns fat reserves in the body which are also good sources of calories. After prolonged period of starvation, the body then converts structural proteins (usually in the form of glucogenic amino acids) into fuels for energy.

It should be noted that NOT all the glycogen are used up immediately because the brain cells and the red blood cells prefer energy from glucose and hence the body reserves some glycogen strictly for them.

Answer:

its d on edge2021

Explanation:

Carla makes a small cardboard boat and floats it in a tub of water. When she adds a drop of dish soap behind the boat, the boat moves forward.

Which statement best explains what happened?
A.) The soap increased the viscosity of the water behind the boat, allowing the water in front of the boat to flow more easily.
B.) The soap reduced the surface tension behind the boat, causing both water molecules and the boat to be pulled forward.
C.) The soap increased the kinetic energy of the water molecules behind the boat, causing both the molecules and the boat to move forward.
D.) The soap formed an immiscible layer on the water, causing the soap to spread out and push the boat forward.

Answers

Answer:

B

Explanation:

Knowing what you know about how a substance travels in diffusion, in
order for oxygen to leave the alveoli and enter the blood, there would be
concentration of oxygen in the alveoli compared to the
blood. *
A.higher
B.Lower

Answers

Answer:

the oxygen should be concentrated in the alveoli

Explanation:

Diffusion: The movement of molecules from a region og higher concentration to a region of lower concentration.

So when the Oxygen is concentrated in the alveoli only then it can move towards the blood

Diffusion is a passive transport system which means it doesnt need energy in the form of atp molecules

if the molecules move from a region of lower concentration to a region of higher concentration it needs atp molecules which is energy and is called active transport system

The answer should be "HIGHER."            

Viral DNA that is integrated into a bacterial chromosome is a

Answers

Answer:

Hidden virus.

Explanation:

It will sit in the cell's DNA for a while and then attack.

There is a relationship between the number of prey organisms and the number of predator organisms in an ecosystem. Identify this relationship and explain how it occurs.

Answers

Answer:

the number of prey organisms and predator organisms is almost the same.

Explanation:

this is because when the number of prey is bigger than the number of predator then there will no balance in the ecosystem

five waste product of plants​

Answers

Answer:

Oxygen, Carbon dioxide, glucose, leaves and bark.

:)

Can cells survive without support of other cells?

Answers

Answer: There are literally countless single celled life forms all over the planet and every creature living is the descendant of single celled organisms. So the answer to your question as written is no, a cell can survive perfectly fine on its own, without the support of other cells, so long as its in a favorable environment.

Explanation:

Answer: No

Cells in bodies of living organisms are designed to help one another, so cells can not live/survive without support of other cells. They work in unity to help our body.

Hope this helps!

I really need help quickly!! will mark brainliest if it's correct. I appreciate it :)

What is a source of stem cells that has the characteristics of self-renewal and limited differentiation?
Embryonic cell
Somatic cell
Amniotic fluid
Heart muscle

Answers

Answer:

In the explanation. :)

Explanation:

It's embryonic cells. Embryonic stem cells (ESCs) are stem cells derived from the undifferentiated inner mass cells of a human embryo. Embryonic stem cells are pluripotent, meaning they are able to grow (i.e. differentiate) into all derivatives of the three primary germ layers: ectoderm, endoderm and mesoderm.

Hope this helps. Have a great day!

Answer:

a

Explanation:

What would the density be of an object that has a mass of 50 g (grams) and a
volume of 10 ml (milliliters)?

Answers

Answer:

5

Explanation:

D=m/v

D=50/10

D=5

The density of an object that has a mass of 50 g and a volume of 10 ml would be:

Density = Mass / Volume

= 50 g / 10 ml

= 5 g/ml

What is density?

Density is a measure of the mass of an object per unit of volume. It is a characteristic property of a substance and is often used to identify and classify materials. The density of an object can be affected by a variety of factors, including its composition, temperature, and pressure.

In general, denser materials tend to be heavier and more compact, while less dense materials tend to be lighter and less compact. For example, a substance with a high density, such as gold, will be much heavier than a substance with a low density, such as air.

Overall, the density of an object can be useful for understanding its physical properties and how it will behave in different situations.

Learn more about density, here:

https://brainly.com/question/29775886

#SPJ2

idk the answer bruh help

Answers

Answer:

The solar System is too big to do a scale model of.

Explanation:

It would be rediculous to even try to sell or make a scale model of the solar system, and so the reason store bought solar systems are smaller is because they have to be.

Answer:______________________________________________________________________________\\Sever Lag!\\___________________________________________

Explanation:_____________________________________________________________________________________________________________________________

when describing a community a bioligist would identify every

Answers

Answer: population that lives together In an area

Explanation: took test

How do you think that Karl von
Frisch gathered information
about the honey bee's
behaviour?​

Answers

Answer:

Karl von Frisch is best known for two major discoveries about honey bees. First, he demonstrated that honey bees have color vision, and published these findings in 191*. Second, in 193* he showed that honey bees use a dance language to communicate food locations to other bees.

Explanation:

Figure 1. Grids for the color vision test. The training color, marked with T, is blue in both cases; all other squares are shades of gray. The left box shows how the grid appears to an animal with color vision. The right box shows how the same grid may appear to an animal without color vision. The training square appears to be the same shade of gray as other squares in the grid. If the test animal cannot see in color, it will confuse the training square with other squares matching its shade of gray.

This clever test for color vision can be applied to any animal which can learn to recognize a feeding station using visual patterns.

The dance language

von Frisch observed that once one honey bee finds a feeding station, many other soon appear at the same station. This suggests that the first bee recruits other bees to the food. How might honey bees recruit help in collecting food? von Frisch¹s discovery of the dance language of the honey bee required careful determination of the correlations between movements of bees inside the hive and the locations of feeding stations. He found two types of dance. The round dance (Figure 2A) causes bees to look for food a short distance (up to about 50 meters) from the hive. The waggle dance (Figure 2B) tells bees the direction and distance to fly to find more distant food sources. Scout bees use these dances to recruit assistance in collecting food resources.

How many layers does earths atmosphere have

Answers

Answer:

7

Explanation:

The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth's surface is called the exosphere.

What do water molecules do when water is a solid?

-They grow bigger and stick together.
-They lose a hydrogen atom.
-They line up and hardly move.
-They join with air molecules.

Answers

Answer: they grow bigger and stick together

Explanation:

which statement about force is incorrect?
a. force causes changes in the motion and energy or matter.
b. some forces cause objects around us to move.
c. force is the ability to change motion and transfer matter.
d. some forces keep objects around us from moving​

Answers

Answer:

c.) force is the ability to change motion and transfer matter

Explanation: just took the quiz so this answer is reliable!

in what part of a chloroplast does glucose production occur

Answers

Answer:

the answer is stroma

Explanation:

39
5 points
9. A family is looking to see how much of their electricity bill is coming from their clothes washer and drier. The washer uses 1500 watts and the clothes drier uses
2000 watts and the family pays $.10 per kilowatt-hour. The appliances runs approximately 30 minutes each day(total together). How much does the family spend
per week to run both these appliances? Show set up with units

Answers

Answer:

Per week expenses = $73.5

Explanation:

Given:

Washer uses = 1500 watts

Drier uses  = 2000 watts

Kilowatt-hour = $0.10

Find:

Per week expenses

Computation:

Total uses = 1500 + 2000

Total uses = 3500

Week uses = 3500(30)(7)

Week uses = 735000

Per week expenses = (735000)(0.10)/(1000)

Per week expenses = $73.5

Although Arroyo does not mention the term "watershed," it was discussed in the unit as being closely related to and impacted by drought and floods. Please discuss how the watershed relates to drought and heat. How might Arroyo have integrated the term watershed into her talk?

Answers

Answer:

Arroyo integrated the term “watershed“ by saying that Oxfam and Swiss Re with the Rockefeller foundation are helping farmers building hillside terraces to conserve water and they are also providing for insurance when the droughts do come.Water shed relates to drought and heat because it will suffer and there would be less water to fill surface water resources and less water to make its way through the earth and into groundwater reservoirs.

Which of the following causes most of the human injuries during a major earthquake?


A. car accidents caused by the ground shaking

B. falling into large cracks that form in the ground

C. violent winds caused by the rapid movement of the ground

D. collapsing buildings and other structures caused by the ground shaking

Answers

Answer:

D. collapsing buildings and other structures caused by the ground shaking

Explanation:

The answer is D I got it right on my test

What tools/techniques do scientists use to collect the data that is used to predict a hurricane's path?

Answers

Answer:

Satellites, reconnaissance aircraft, Ships, buoys, radar, and other land-based platforms are important tools used in hurricane tracking and prediction. While a tropical cyclone is over the open ocean, remote measurements of the storm's intensity and track are made primarily via satellites.

An honest mistake ___.
A. Occurs when laws are deliberately broken.
B. Happens on accident.
C. Happens on purpose.
D. Is against the law.

Answers

B. happens on accident

Answer:

B. happens on accident

Explanation:

it is not A. because "deliberately" means that the intention of the action(s)  was to break the law not just make a mistake.

It is not C. because its the exact opposite of a mistake.

It is not D. because you typically don't break the law with an honest mistake, maybe if you didn't see the speed sign so you go over the limit or something but those occasions are far and in between.

May I have a brainliest?

The weather conditions at a given place over a long period of time is known as __________.

Answers

Answer:

Climate

Explanation:

Weather is like day to day, but climate is the average weather.

For example, the Climate in South Texas is hot, humid in the summer.

Did this help!?!

Answer:

Climate

Explanation:

5.the largest classification which all organisms have in common is......
6.what is the name of that group?

Answers

I think the answer is organisms

ccording to cell theory, viruses are considered nonliving because they

Answers

Answer:

Reproduce in the host body

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