Tag: striving for a better environment

Quizzes (20) Questions (74)

Questions Related to striving for a better environment

Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Crop rotation is helpful because

  1. lt provides more nitrates in the soil.

  2. lt provides more sulphates in the soil.

  3. lt provides more potassium in the soil.

  4. lt provides more phosphorus in the soil.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If the same crop is grown year after year, fertility of soil is lost due to utilization of same minerals again and again, thus, disturbing the soil structure, which facilitates soil erosion. Legumes are useful in rotation of crops because of having nodulated roots which harbour nitrogen fixing Rhizobium bacteria and it leaves more nitrates in the soil when the roots are left over in fields and only aerial parts of legume crops are harvested.

Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Which of the following may increase the fertility of soil?

  1. Vermicompost

  2. Manure

  3. Industrial waste

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vermicomposting is a method in which earthworms are used to convert the organic wastes into compost, which is a good fertilizer for plants. It increases the soil fertility. Manure is the organic matter mainly animal feces and straw. It adds nutrients (nitrogen) in the soil, which increases the soil fertility. So, the correct option is D.

Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Soil conservation can be best achieved by having a

  1. Wind screens

  2. Good plant cover

  3. Restricted human activity

  4. Low rainfall
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Anthropogenic soil erosion is caused by removal of plant cover through over grazing, litter collection, tree felling, leaving the soil unprotected during agricultural operations. Anthropogenic factors remove green cover and expose the soil to natural agents of soil erosion i.e., water and wind. When rains fall, most of the top layer of soil is washed away, if the soil is not covered by vegetation. 

Conservation of soil can best be achieved through good green cover over soil.

Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Which of the following can be considered as soil pollutants?

  1. Fertilizers

  2. Pesticides

  3. Weedicides

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Soil pollution is caused by removal or addition of substances which decrease its productivity. It is caused by agrochemicals, industrial wastes, municipal wastes etc. It adversely affects the fertility of the soil. Pesticides, weedicides, and fertilizers are added to soil in agriculture practices to remove unwanted plants and increase the fertility of the soil. These chemicals penetrate into soil and damages the soil.

Thus, the correct answer is option D.

Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Soil salinization is common in semi-arid region because

  1. Soil erosion occurs very frequently

  2. Leaching is not adequate

  3. Dense microbial flora

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Soil salinization is the process of increasing the salt content in the soil. It is common in semi-arid regions because of inadequate leaching which leads to accumulation of salt below the root zone leading to salinization.
So, the correct answer is option B.
Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Which of the following prevents soil erosion?

  1. Allowing herbivorous animals to graze excessively.

  2. Growing plants to form a soil cover.

  3. Increasing fertility of the soil.

  4. Making the land slopy.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When trees are cut on a large scale land becomes barren. This results in the loss of upper soil layer due to heavy wind or flowing water leading to soil erosion. Roots of plants hold the soil particles and prevent their loss. Hence afforestation i.e. growing plants to form a soil cover prevents soil erosion. Thus the correct answer is option B.

Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

In hilly areas, erosion is minimised by

  1. Terracing

  2. Manuring

  3. Ploughing

  4. Mixed cropping
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Terracing is a process of making sloped plane into series of succesively receding flat surfaces or platforms resembling stairs, this is how erosion is minimised.

So, the correct answer is 'Terracing'

Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Which of the following area possess poorest decomposition of dead organic matter:-

  1. Tropical rain forest

  2. Temperature deciduous forest

  3. Tundra

  4. Taiga
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
One reason the rainforest soil is so poor is that a large portion of the supplements is put away in the plants themselves. In any woods, dead natural issue tumbles to the ground, giving profitable supplements to new development. In cooler or drier atmospheres, the supplements develop in the dirt. 
So, the correct option is 'Tropical rain forest'.
Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Soil erosion can be prevented by

  1. Restricted human activity

  2. Good plant cover

  3. Checking movement of animals

  4. Wind screen alone
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Soil erosion is the phenomenon in which the top most layer of soil gets lost, since plants have the capability of holding the soil particles together and prevent them from being eroded away

So, the correct answer is 'Good plant cover'

Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Which of the following reasons contribute to negative soil pollution?

  1. Reduction of soil productivity due to the addition of agrochemicals

  2. Reduction of soil productivity due to soil erosion and overuse

  3. Reduction of soil productivity due to the addition of industrial wastes

  4. Reduction of soil productivity due to faulty sanitation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Soil pollution greatly due to use of  large amount of herbicides, pesticides. There also some more reason of soil pollution like industrial wastes are dumped into fertile soil which get polluted and also not having proper satiation. But soil erosion is not responsible for soil pollution, soil erosion is mainly due to deforestation. So B option is right.