Tag: protecting our environment

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Questions Related to protecting our environment

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 regions, erosion can be minimised by 

  1. Terracing

  2. Ploughing effectively

  3. Manuring

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

Terracing is the practice of creating nearly level areas in a hillside area. The terraces form a series of steps, each at a higher level than the previous. Terraces are protected from erosion of soil. 

Strip cropping or strip farming is defined as alternating crop rows between heavy-rooted plants and loosely-rooted plants to minimize erosion. An example of strip cropping is planting a field with strips of soybean and alfalfa.

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 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 fertility can be increased with out addition of fertilisers by 

  1. Strip cropping

  2. Crop rotation

  3. Terracing

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

Crop rotation is the practice of growing a series of different types of crops in the same area in sequential seasons. Crop rotation gives various nutrients to the soil. Growing the same crop in the same place for many years in a row disproportionately depletes the soil of certain nutrients. With rotation, a crop that leaches the soil of one kind of nutrient is followed during the next growing season by a dissimilar crop that returns, that nutrient to the soil or draws a different ratio of nutrients: for example, rice followed by cotton. 

Strip cropping or strip farming is defined as alternating crop rows between heavy-rooted plants and loosely-rooted plants to minimize erosion. Terracing is the practice of creating nearly level areas in a hillside area. The terraces form a series of steps, each at a higher level than the previous.

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

The pH of water sample collected from a river was found to be acidic in the range of 3.5 to 4.5, on the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely cause for lowering the pH of river water?

  1. Soap and detergent factory

  2. Lead battery manufacturing factory

  3. Plastic cup manufacturing factory

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

Lead battery manufacturing factory have acid electrolyte, so it will cause for lowering tin pH of river water.

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

In this soil conservation method, several grasses are left out in soil after the crop is harvested

  1. Tillage

  2. Crop rotation

  3. Terrace farming

  4. Contour farming
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tillage is the method of mechanical agitation of various types like as digging, stirring, and overturning to improve the crop yield. Crop rotation helps in increase in soil fertility. It is the process of growing a series of different crops in the same area in sequenced seasons. Terrace farming is a type of farming that consists of various steps or terraces. In contour farming, several grasses are left out in soil after the crop is harvested. In contour farming, crops are placed perpendicular to slopes to follow the contours of a slope of a field. This helps in breaking down the flow of water and prevent soil erosion.

Thus, the correct answer is 'Contour farming.'