Tag: deforestation and conservation

Questions Related to deforestation and conservation

Which of the following are characteristics of weed?

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Little or no recognized value in medicine

  2. Rapid growth

  3. Competitive with crops

  4. All of the above

Show answer
Correct Option: D
Explanation:

Any plant not sown in the field by the farmer and grow where it is not wanted is called a weed. 

Characteristics of weeds are as follows:
((1) The weeds seed germinate early and the seedlings grow faster. They being hardy compete with the crop plants and deprive them of light, moisture, and nutrients. 
(2) They flower earlier, run to seed in profusion and mature ahead of the crop. They are, therefore, difficult to control and it may be even impossible to eradicate some weeds completely. 
(4) They are harmful to crops, cattle, and human beings. 
(5) They can survive even under adverse conditions. 
(6) They are prolific and have a very high reproductive capacity. 
(7) The viability of seeds remains intact, even if they are buried deep in the soil. 
(8) The seeds may have special structures like wings, spines, hooks, sticky hairs, etc. on account of which they can be easily disseminated over long distances. 
(9) Many weeds like doob are vegetatively propagated and spread rapidly all over the field even under adverse conditions.

Therefore, the correct answer is option D.

Weeds compete with crops for

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Soil

  2. Nutrients

  3. Space

  4. Both B and C

Show answer
Correct Option: D
Explanation:

  • A weed can be defined as any plant that requires some form of action to reduce its effect on the economy, the environment, human health, and amenity. 
  • Weeds compete with crops for space, nutrients, water, and light. Smaller, slower-growing seedlings are more susceptible than those that are larger and more vigorous. 

Therefore, the correct answer is option D.

Weeds, insects and diseases can be controlled by _____

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Use of pesticides

  2. Sprayed on crop plants

  3. Herbicides, insecticides and fungicides

  4. All of the above

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Correct Option: D

Weeds can be removed by using

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Pesticides

  2. Weedicides

  3. Antibiotics

  4. Bactericides

Show answer
Correct Option: B
Explanation:

Weeds are the undesirable plants that are not cultivated. They are the plants at the wrong place. They compete with the crop for nutrients and space. Hence, they are harmful to the crop. These weeds can be controlled by using weedicides.

Unwanted plants growing along with crop plants are called as ________.

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Herbs

  2. Weeds

  3. Crops

  4. Grass

Show answer
Correct Option: B
Explanation:

The unwanted plants which grow in field along with the crop plants are termed as weed. They are harmful for the crops as they compete for nutrients with them.

The weeds competes for 

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Food

  2. Water

  3. Sunlight

  4. All of the above

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Correct Option: D

Which of the following is a weed?

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Sunflower

  2. Sugarcane

  3. Rose

  4. Wild grasses

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Correct Option: D

Which of the following is important to prevent the growth of weeds?

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Insecticides

  2. Pesticides

  3. Biofertilizers

  4. Weedicides

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Correct Option: D
Explanation:

Insecticides and pesticides are used to kill the insects and the pest that harm the crops . While biofetilizers are the manure (contains living microorganisms) . On the other hand , weedicides are used to kill the weeds .

So the correct option is 'Weedicides' .

The unwanted plants that grow in a crop field are known as

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Seeds

  2. Weeds

  3. Fruits

  4. Flowers

Show answer
Correct Option: B
Explanation:

The unwanted plants in a crop field are known as weeds. These compete with the crop plants in the field for nutrition, hence hampering their growth. 

So, the correct option is 'Weeds' .

Which of the following is a weed?

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Wheat

  2. Rice

  3. Maize

  4. None of the above

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Correct Option: D