Tag: soil and its conservations

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Questions Related to soil and its conservations

Multiple choice evs - i rules are for everyone soil and its conservations soil pollution-control protecting our environment sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

Which one of the following is not a method of soil conservation?

  1. Mulching

  2. Overgrazing

  3. Strip cropping

  4. Crop rotation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Soil conservation is the process of prevention of soil erosion and to prevent the soil from becoming infertile.  In mulching, a protective layer is placed over the soil such as straw, grasses etc., which helps in retaining soil moisture and also regulates soil temperature. Strip cropping is a process in which field is divided into strips and different crops are grown in alternate strips to preserve soil fertility. Crop rotation means growing of different types of crops on the same field in succession which prevents the depletion of nutrients from the soil. Overgrazing or intense grazing will erode the soil.

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

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 evs - i rules are for everyone soil and its conservations soil pollution-control protecting our environment sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

In hilly areas, erosion is minimized by

  1. Terracing

  2. Manuring

  3. Ploughing

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

Soil erosion is removal of top soil by agency of water (water erosion) and wind (wind erosion). One of the methods for soil conservation against soil erosion is terracing. In terracing, slope is divided into a number of flat fields for slowing down the flow of water. Terracing is very effective in hilly areas for control of soil erosion.

Multiple choice evs - i rules are for everyone soil and its conservations soil pollution-control protecting our environment sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

Soil erosion can be prevented by

  1. Overgrazing

  2. Removal of vegetation

  3. Afforestation

  4. Increasing birds population
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Soil erosion can be prevented by afforestation and reforestation. Reforestation is restoration of forests, which have been destroyed by deforestation, while afforestation is planting of new forests. Plants hold soil with there roots and thus prevent erosion.
So, the correct answer is 'Afforestation'
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 evs - i the environment and us soil and its conservations soil pollution-control protecting our environment

Soil pollution can lead to water pollution

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The contamination of soil with solid waste, acid rain excess of fertilizers, Insecticides, and herbicides is called soil pollution.
  • Soil pollution can lead to water pollution if toxic chemicals leach(drain away from the soil) into groundwater, or if contaminated runoff reaches streams, lakes, or oceans.
  • Hence Soil pollution can lead to water pollution is a true statement.
  • So, the correct answer is 'True'.
Multiple choice evs - i rules are for everyone soil and its conservations soil pollution-control protecting our environment sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

Mulching is helpful in

  1. Increasing soil fertility

  2. Improvement of soil structure

  3. Moisture conservation

  4. Better crops
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mulching refers to the covering of harvested field with plant litter or polythene of low density, in order to decrease run off, prevent the growth of weeds and retention of water. It protects the roots from seasonal variations.During initial stages of growth, mulching helps to maintain a stable temperature for proliferation of seedling.