Tag: cropping patterns

Questions Related to cropping patterns

Removal of weeds from cultivated fields during the early stages _____

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

  1. Crop growth is essential for a good harvest.

  2. Just for spending time

  3. For new crop

  4. None of these

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Correct Option: A

Weeds take up nutrients and ______ the growth of the crop

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

  1. Reduce

  2. Increase

  3. No change occur

  4. None of these

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Correct Option: A

Good crop management involves _______ before distribution

biology improvement in food resources improved methods of agriculture cropping patterns food for all

  1. Storage of grains

  2. Production of grains

  3. Applying coat layer

  4. None of these

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Correct Option: A

If weeds and pests are not controlled at the appropriate time then ____

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

  1. They can damage the crops so much that most of the crop is lost

  2. They can increase the crops so much that most of the crop is lost

  3. They can damage the crops so much that most of the crop is gain

  4. None of these

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Correct Option: A

Which of the following groups include only weeds?

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

  1. Parthenium, Xanthium and Cyperinus

  2. Xanthium, Parthenium and Maize

  3. Convolvulus, Balsam and Paddy

  4. Amaranthus, Convolvulus and Chenopodium

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Correct Option: A
Explanation:

Weeds can be defined as the unwanted plants that grow in the field and harm the desired crops. Parthenium is the flowering plant which can cause an allergy is the most important weed of corn and wheat field. Xanthium is the ruderal weed of maize. Cyperinus is the most invasive weed found throughout the world. It is the weed of rice field. 

Which of the following is also called unwanted plants?

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

  1. Weeds

  2. Shrubs

  3. Grasses

  4. Feeds

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Correct Option: A
Explanation:

Weeds are the unwanted or undesirable plants as they compete with desirable crops in the field for nutrients, sunlight and interfere with the growth of crops.

So, the correct answer is option A.

Herbicides are chemicals which control

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

  1. Insects

  2. Fungi

  3. Weeds

  4. Nematodes

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Correct Option: C
Explanation:

Herbicides are chemical which control weeds. These are also called as weedicides. Glufosinate ammonium is a broad spectrum herbicides. A 2,4-D (2,4-Dichlorophenoxyacetic acid) is a plant hormone that acts as herbicide. It kills the broadleaf weeds that harm the plants by causing uncontrolled growth in them.

Thus, the correct answer is option C.

Which of the following chemical/s cannot be used as a weedicide?

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

  1. Dalapon

  2. Metachlor

  3. 2-4- Dichlorophenoxy-acetic acid.

  4. Colchicine

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Correct Option: D
Explanation:
A.Dalapon - used as a weedicide
B.Metachlor - used as a weedicide
C.2-4-Dichlorophenoxy acetic acid - used as a weedicide and hormone.
D.Colchicine  - used as a mutagen . It is a mitotic poison, it inhibits spindle formation that results in polyploidy of a cell. This can be detrimental for the major crop. So it isn't used as a weedicide.
So, the correct option is 'Colchicine'.

The best time for removal of weeds is before they produce flowers and seeds.

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

  1. True

  2. False

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Correct Option: A
Explanation:

Removal of weed (or weeding) is done before weeds flower because if they flower they will also produce seeds and finally result in the dispersal of the seeds which makes it difficult to control the weeds because each seed will produce a new weed plant.

So the correct option is ' True ' .

Which of the following statement can be related to weed?

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

  1.  A weed is a plant considered desirable in a particular situation

  2.  A weed is a plant considered undesirable in a particular situation

  3.  A weed is a plant considered undesirable in  all situations.

  4.  A weed is a plant considered desirable in a all situations.

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Correct Option: B
Explanation:

A weed is a wild plant that grows in an unwanted region and is a competition to cultivated plants. They are also known as invasive plants. Weeds typically produce a large number of seeds and propagate enormously. They are highly competitive, persistent, pernicious and may interfere negatively with human activities. It may have good properties also. But the undesirable properties outweigh the desirable properties at a given place. 

So the correct option is 'A weed is a plant considered undesirable in a particular situation'.