Tag: soil and its conservations

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

Aeration of soil can be increased by

  1. Earthworm

  2. Domestic waste

  3. Industrial waste

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Earthworms increase the soil porosity by improving the soil aggregation and by creating permanent burrows. By increasing the porosity, they help in the exchange of gases with the atmosphere. They also increase the water holding capacity of soil, moisture content, soil texture and degrade pesticide residues. They decompose the organic matter and add humus to the soil. So, the correct option is A.
Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

How can recycling materials help in reducing soil pollution?

  1. It decreases the volume of refuse

  2. It increases the volume of refuse

  3. It decreases reuse

  4. It reduces natural conservation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Recycling reduces the amount of waste that ends up in landfills or as litter, thereby decreasing the volume of refuse that could potentially contaminate the soil.

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

Soil pollution can be controlled by

  1. Planting trees on barren slopes

  2. Proper dumping of unwanted materials

  3. Production of natural fertilizers

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

Soil pollution can be controlled by several factors. It includes the limited use of fertilizers and pesticides. The biological control method must be known and implemented. The grazing must be controlled and forest management should be done properly. The afforestation and reforestation must be done. In areas of wind erosion wind breaks and shields must be used. The soil binding grass must be planted and the large trees must be placed along the banks. The industrial wastes must be dumped in the low lying areas. There is a definite technique of cropping which does not allow the weeds to settle on the fields.
So, the correct answer is 'All of the above'.

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

Which of the following is helpful in controlling soil pollution?

  1. Use of pesticides should be minimised

  2. Cropping techniques should be improved to prevent growth of weeds

  3. Use of fertilisers should be judicious

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

The harmful change in the colour, texture, and quality of soil due to addition and removal of any material is called soil pollution. Soil pollution reduces the productivity of the soil. There are several pollutants that cause soil pollution. For example, agricultural wastes, radioactive wastes and discarded materials of hospitals etc. Weeds are the unwanted crops that compete with the main crop. Weedicides are the chemicals used to kill the weeds so that plants can grow properly. Cropping techniques should be improved to prevent the growth of weeds to minimise soil pollution. Other chemicals like pesticides, insecticides, fertilizers etc. are also used to promote the growth of crops. These are the chemicals that get consumed with the food by the living beings and are also involved in changing the pH of the soil. These are harmful to living beings and the ecosystem. For example, repeated use of fertilizers makes the soil acidic which in turn decreases the productivity of the soil. So, use of pesticide and fertilizers should be minimised, fertilizers should be replaced by manures and composts. Therefore, the correct option is D.

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

Which of the following helps in the formation of compost?

  1. Earthworm

  2. Flatworm

  3. Leech

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Earthworms are traditionally called as friends of farmers because they increase aeration and make available nitrogen and potassium to plants in easily usable form. The dead and decaying materials contain certain complex molecules which are churned and broken down into simpler one and forms compost. The process is known as vermicomposting.

Thus, the correct answer is option A.

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

Choose the correct statement.
a)Trash which breaks down into the soil is the major cause of pollution.
b) Biodegradable waste is the main cause of soil pollution.
c) Soil contamination is a part of land degradation.

  1. Only A

  2. Both A and B

  3. Only C

  4. A, B and C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The trash is mainly composed of the papers and the cardboard. These components contain the cellulose and can be degraded by the activity of the microorganisms. These products do not cause soil pollution. 

Biodegradable is the waste which can be degraded by the activity of microbes. They are converted into elements which get mixed with the soil. These sources are not the cause of soil pollution. 
When there is a change in the soil fertility and the composition of the soil contains toxic and harmful compounds, the soil is said to be contaminated. The contaminated soil reduces the fertility and productivity of the soil. The land gets degraded and cannot be used for production purposes. 
Thus, the correct answer is option C. 

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

The name of Smt.Thimmakka is associated with the

  1. Planting and conservation of avenue trees

  2. Agitations against hydroelectric project

  3. 'Appiko' movement

  4. Conservation of fauna and flora of the western ghats
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Saalumarada Thimmakka is an Indian environmentalist from the state of Karnataka, noted for her work in planting and tending to 384 banyan trees along a four-kilometre stretch of highway. Her work has been honoured with the National Citizen's Award of India.

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

Which of the following may cause the disturbance in soil profile?

  1. Industrial effluents

  2. Domestic waste

  3. Biodegradable waste

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The industrial wastes include the chemicals which act as pollutants. These pollutants reduce the fertility of the soil and the soil becomes less productive. This disturbs the soil profile and nutrient content of the soil. The number of beneficial microbes in the soil gets reduced. The domestic and biodegradable wastes can be degraded by the microbial activity and converted to nutrient forms. So, there is no effect of these wastes in the contamination of the soil.

Thus, the correct answer is option A. 

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

Afforestation should be with

  1. Exotic species

  2. Indigenous species

  3. Bamboos

  4. Eucalyptus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Afforestation is the process of planting trees, or sowing seeds, in a barren land devoid of any trees to create a forest. The term should not be confused with reforestation, which is the process of specifically planting native trees into a forest that has decreasing numbers of trees.
  • Indigenous species refers to species originating or occurring naturally in a particular place(native).
  • Hence Afforestation should be with Indigenous species because they are easily available and have a high growth rate.
  • So, the correct answer is  'Indigenous species'.