Tag: striving for a better environment

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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

Which of the following is an agrostologic method of soil conservation?

  1. Dry farming

  2. Mulching

  3. Basin listing

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

Agrostologic method of soil conservation means in which grasses are grown to check the soil erosion. In dry farming, crop production, animal husbandry and grazing fields are used to prevent soil erosion. It is carried out in low and moderate rainfall areas. 

Mulching is effective against wind and water erosion. In this maize stalks, cotton stalks are used as mulch which is upto 2-3 inches thick. 
In basin listing, small basins are constructed along contours to retain water. 
In terracing, a channel is constructed along the slope to divert the run off water. 
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

Pyrolysis means

  1. Burning in absence of carbon dioxide

  2. Burning in absence of oxygen

  3. Burning in absence of carbon monoxide

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

Pyrolysis is a thermochemical decomposition of organic material at high temperatures in the absence of oxygen. It involves the change of chemical composition as well as physical state. It is an irreversible process. The process is used heavily in the chemical industry to produce charcoal, activated carbon, to convert biomass into biochar, to turn waste into safely disposable substances.

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

Terracing helps in soil conservation in

  1. Plains

  2. Deserts

  3. Hilly areas

  4. Wet areas
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • In agriculture, a terrace is a piece of sloped plane that has been cut into a series of successively receding flat surfaces or platforms, which resemble steps, for the purposes of more effective farming. This type of landscaping is therefore called terracing.
  • Terracing reduces both the amount and velocity of water moving across the soil surface in hilly areas, which greatly reduces soil erosion.
  • Hence Terracing helps in soil conservation in hilly areas.
  • So, the correct answer is 'Hilly areas'.
Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

For better survival of human population, which is the most important step?

  1. Afforestation

  2. Reduction in population density

  3. Conservation of wild life including tribals

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

Afforestation refers to the conversion of wasteland into a woodland or forest. It is essentially the transformation of land which has not been forested for a period of more than 40 year to woodland through seeding and planting. Afforestation is the best technique used to minimize the greenhouse effect. Planting of trees in semi-arid areas attracts rainfall. This way, agricultural practices such as irrigation are carried out efficiently. In addition, afforestation acts as a catchment for water and soil conservation. With an increase in demand for forest and timber products, afforestation is very valuable due to the explosion of livestock and human population. Disadvantages of high human population density are global warming, pollution, rapid use of natural resources, more exploitation of other living forms and non living systems like rivers, faster destruction of natural systems, deforestation, habitat destruction, pollution, extinctions etc. Hence population density should be reduced. 

Therefore, 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

Select the wrong statement from the following.

  1. Forests provide variety of products.

  2. Forests have greater plant diversity.

  3. Forests do not conserve soil.

  4. Forests conserve water.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Forests are an important natural resource. They provide a variety of products, are a center of biodiversity, conserve water and soil. Forests are very important for maintenance of water cycle and ecological balance. Forests provide habitat to a large variety of organisms and tribal humans are directly dependent on forests for food and habitat.

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

Which is not a method of soil conservation?

  1. Strip cropping

  2. Overgrazing

  3. Crop rotation

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

Soil conservation is a technique aimed at preserving the soil. There are various methods for soil conservation such as afforestation, manuring and crop rotation, step farming, windbreaks, strip cropping, mulching. Strip cropping is the method of farming in which the field is partitioned into long, narrow strips which are alternated in a crop rotation system. Crop rotation is the method of farming in which different types of crops are grown in the same area in different seasons. Mulching is the process of applying a layer of material on the soil in order to conserve soil moisture, improve fertility.

Thus, the correct answer is 'Overgrazing.'

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

The importance of soil for plant growth is

  1. Soil provides water

  2. Soil provides nutrients

  3. Soil provides support

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

The importance of soil for plant growth is
1. Anchoring the plant.
2. Source of water and minerals.
3. Availability of oxygen for respiration of root cells.
4. Symbiotic association with microbes.

Therefore, 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

Read the given statements and select the correct option.


Statement 1: Open landfilling refers to the throwing waste on an uncovered area, which is periodically burnt or compressed.
Statement 2: In sanitary landfilling, the waste is compacted and covered by layer of dirt.

  1. Both statements 1 and 2 are correct.

  2. Statement 1 is correct but statement 2 is incorrect.

  3. Statement 1 is incorrect but statement 2 is correct.

  4. Both statements 1 and 2 are incorrect.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Open dumping or open landfilling is throwing of waste on uncovered low lying area. The waste is piled as high as the equipment can easily do. The waste is periodically burnt or compressed at intervals to reduce its bulk. In sanitary dumping or sanitary landfilling the waste is pulverised, compacted and covered over by a layer of dirt.

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

An agrostologic method of soil conservation is

  1. Terracing

  2. Mulching

  3. Basin listing

  4. Dry Farming
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Soil conservation is the protection of soil from erosion and other types of deterioration, so as to maintain soil fertility and productivity.
  • Dryland Farming is the cultivation of crops without irrigation in regions of limited moisture, typically less than 20 inches (50 centimeters) of precipitation annually. It helps in soil conservation.
  • Hence an agrostologic method of soil conservation is Dry Farming.
  • So, the correct answer is 'Dairy farming'.