Tag: improved methods of agriculture

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

Xanthium, Parthenium, Cyperus rotundus are the examples of 

  1. Diseases

  2. Pesticides

  3. Weeds

  4. Pathogens
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Weeds are unwanted plants which grow along with the crop plants in the cultivated field. Some common weeds in India are Amaranthus (Chaulai), Parthenium (Gajar ghas), Cyperus rotundus (Motha), Chenopodium (Bathua), Xanthium (Gokhroo). Weeds compete with the crop plants for nutrients, space, light and water. This results in lowering the food grain quality and reduction in crop yield. Weeds may produce toxic substances which may interfere with crop growth. During harvesting, weeds get mixed up with crops to lower down its quality.

So, the correct answer is 'Weeds'.

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

The growth of weeds can be controlled by

  1. Manual removal

  2. Irrigation

  3. Herbicides

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

The growth of weeds can be controlled by the following methods:

(1) Coverings: In domestic gardens, methods of weed control include covering an area of ground with a material that creates a hostile environment for weed growth, known as a weed mat. Several layers of wet newspaper prevent light from reaching plants beneath, which kills them.
(2) Manual removal: Many gardeners still remove weeds by manually pulling them out of the ground, making sure to include the roots that would otherwise allow them to resprout.
(3) Irrigation: Drip irrigation involves bringing water directly to the roots of the desired plants, thereby limits weed's access to water.
(4) Biological pesticide: Vinegar kills the visible part of the weed. They will wrinkle and die the next day, although the root will still be in place to continue growing. 


Therefore, the correct answer is option D.

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

Weeding is necessary because_______________

  1. They affect growth of the plant

  2. They affect the nutrients supplied to the soil

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Weeding is necessary since weeds compete with the crop plants for water, nutrients, space and light. Thus, they affect the growth of the crop. Some weeds interfere even in harvesting and may be poisonous for animals and human beings. 

Therefore, the correct answer is the option C.

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

Which of the following are characteristics of weed?

  1. Little or no recognized value in medicine

  2. Rapid growth

  3. Competitive with crops

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

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

Weeds compete with crops for

  1. Soil

  2. Nutrients

  3. Space

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

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

Weeds, insects and diseases can be controlled by _____

  1. Use of pesticides

  2. Sprayed on crop plants

  3. Herbicides, insecticides and fungicides

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

Integrated pest management involves using various methods, including chemical agents like herbicides, insecticides, and fungicides, to control weeds, insects, and diseases.

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

Weeds can be removed by using

  1. Pesticides

  2. Weedicides

  3. Antibiotics

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

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

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

  1. Herbs

  2. Weeds

  3. Crops

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

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

Identify the advantage of proper storage.

  1. The quality of food is ensured for a longer time.

  2. The variety of food may be available in far places.

  3. The food poisoning is prevented.

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Proper storage of food helps in maintaining food quality by retaining flavor, colour, texture and nutrients, while reducing the chance of contracting a food-borne illness. It has various advantages as the quality of food remain intact therefore it can be used for longer time, it can be made available at far places where such food is not harvested and since it remains unaffected by microbes, food poisoning can be prevented.
So, the correct answer is option D.
Multiple choice evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

The weeds competes for 

  1. Food

  2. Water

  3. Sunlight

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

Weeds compete with crops for all essential growth resources: nutrients (food), water, and sunlight. This triple competition makes weeds so harmful to agricultural productivity. All options A, B, and C are correct.