Tag: waste and its management
Questions Related to waste and its management
The ............ in microbial flora in the soil is an indicator of soil pollution.
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Decrease
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Increase
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Gradual increase and decrease
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None of the above
When the soil is polluted, there is a decrease in the quality and fertility of the soil. The nutrients which were present in the soil has been lost. This results in a reduction in the number of microbes which were inhabited in the soil. So, when there is a decrease in the level of the microbial flora of the soil, it indicates that the soil has been polluted.
Reduction in soil productivity due to undesirable substances is a type of
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Negative soil pollution
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Positive soil pollution
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Neutral pollution
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None of the above
The removal or addition of substances and factors which decrease its productivity, quality of plants and ground water is called as soil pollution, reduction in soil productivity due to the addition of undesirable substances is a positive soil pollution and negative soil pollution is the reduction in soil productivity due to erosion and overuse. The neutral pollution mainly caused due to change in the pH of the soil. Thus, the correct answer is option B.
Soil contamination is a part of
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Soil erosion
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Land degradation
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Deforestation
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None of the above
Soil pollution is caused by the addition of substances and factors which decrease its productivity. When the chemicals from the wastes are released into the soil, there is contamination of the soil. This results in degradation of the soil because there is a loss of fertility of the soil and the nutrient value is reduced.
Materials of biological origin which are commonly used to maintain and improve soil fertility are
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Green manure
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Biofertilizers
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Bioinsecticides
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Both (a) and (b)
Most soils are naturally fertile but to maintain the fertile nature, fertilizers are needed. Green manure and biofertilizers contains range of nutrients in different proportions which are essential for plants.
Match the sets.
Column I | Column II | ||
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I | Artemisia tridentata | A | Saline soils |
II | Capparis spinosa | B | Dominate in areas destructed by fires |
III | Pteris aquilina | C | Indicates intense soil erosion |
IV | Amaranthus and chenopodium | D | Grow better in over grazed area |
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I- D, II- B, III- C, IV- A
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I- B, II- C, III- D, IV- A
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I- C, II- A, III- B, IV- D
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I- D, II- C, III- B, IV- A
Artemisia tridentata is an aromatic shrub. It is commonly called as sagebrush. It belongs to the family Asteraceae which grows in arid and semi-arid conditions, throughout a range of cold desert, steppe and mountain habitats in the intermountain West of North America.
Soil pollutants affecting food chains and food webs by killing microorganisms are?
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Chemical fertilizers
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Agriculture wastes
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Pesticides
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Pathogens
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$NO _2$
What is the main reason why the soil becomes contaminated?
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Organic methods of farming
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Agriculture farming
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The presence of man made waste
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Afforestation
Which of the following causes soil pollution?
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Oil spill
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Fertilizers
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Acid rain
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All of the above
Acid rain cause soil pollution by
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Changing the chemical nature of soil
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Altering the fertility of soil
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Increasing the mineral content of the soil
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Both A and B
What is the effect of soil pollution on growth of plants?
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The ecological balance gets affected due to the widespread contamination of the soil.
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Growth of plants increases
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Growth of plants is retarted
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None of the above