Tag: improvement in food resources

Quizzes (20) Questions (132)

Questions Related to improvement in food resources

Multiple choice evs improvement in food resources crop yield improvement food supply crop improvement methods and organisations

Which of the following methods of cultivation will result in the loss of soil fertility?
I.Crop rotation
II. Shifting cultivation
III. Excessive use of chemical fertilizers

  1. I and II only

  2. III only

  3. I and III only

  4. I, II and Ill
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When there is excessive use of chemical fertilizers and pesticides, the chemical salts accumulate in the soil and affect the quality and fertility of the soil. 

Thus, the correct answer is option B. 

Multiple choice biology improvement in food resources crop yield improvement food supply crop improvement methods and organisations

Which of the following statements is not true?

  1. The rotation of crops improves the fertility of soil.

  2. The rotation of crops saves a lot of nitrogenous fertilisers.

  3. The rotation of crops helps in weed and pest control.

  4. The rotation of crops helps in the maintenance of nutrients in the soil.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Crop rotation is a pattern of growing different types of crops in the same area. This method helps in the replenishment of nutrients by the regular succession of crops over the same field and enhances the health of crops. It minimizes the use of nitrogenous fertilizers. The nutrient quality of the soil can be maintained. There is no effect on the weeds and pests. 

Thus, the correct answer is option C. 

Multiple choice biology improvement in food resources crop yield improvement food supply crop improvement methods and organisations

Rotation of crops is essential for

  1. Increasing the quantity of proteins

  2. Increasing the quantity of minerals

  3. Increasing fertility of the soil

  4. Getting different kinds of crops
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

(c) If the same crop is grown year after year, fertility of soil is lost due to utilization of same minerals again and again. Soil fertility is usually maintained in the field by rotation of crops i.e., a crop is alternated by a leguminous crop.


Multiple choice evs improvement in food resources crop yield improvement food supply crop improvement methods and organisations

Crop rotation is used by farmers to increase

  1. Nitrogenous content of soil

  2. Organic content of soil

  3. Community area

  4. Soil fertility.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Crop rotation is the practice of growing of different crops in succession on a piece of land to avoid depletion of  a particular type of nutrient from the soil and to control the weeds , pests  & diseases . Other main reason of crop rotation is to give the soil the time to regain it's fertility 

So, the correct answer is 'Soil fertility'

Multiple choice evs improvement in food resources crop yield improvement food supply crop improvement methods and organisations

Genetically improved crop varieties can be developed by

  1. Somatic hybridisation

  2. Transgenic technology

  3. Somaclonal variations

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

Genetically improved crops are developed through various biotechnological methods. Both somatic hybridization (fusing somatic cells) and transgenic technology (inserting foreign DNA) are established techniques for crop improvement.

Multiple choice evs improvement in food resources crop yield improvement food supply crop improvement methods and organisations

Crop rotation helps in

  1. Increase in soil fertility

  2. Decrease in soil erosion

  3. Decreased water loss

  4. Decrease in soil fertility
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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. It also helps in reducing soil erosion and increasing in crop yield.

Thus, the correct answer is 'Increase in soil fertility.'

Multiple choice evs improvement in food resources crop yield improvement food supply crop improvement methods and organisations

Crop rotation is employed for

  1. Increasing nitrogen content of soil

  2. Checking soil erosion

  3. Community development

  4. Enhancing soil fertility
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Crop rotation is the practice of growing a series of dissimilar or different types of crops in the same area in during different seasons. It is done so that the soil is not depleted of a particular type of  nutrients. It helps in reducing soil erosion and increases soil fertility and crop yield. 

So, the correct answer is 'Enhancing soil fertility'

Multiple choice evs improvement in food resources crop yield improvement food supply crop improvement methods and organisations

Which one of the following is an important sugar yielding crop that can be profitable cultivated in soils having a high amount of sodium?

  1. Sugar-beet

  2. Palymyra palm

  3. Sugarcane

  4. Sweet potato
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sugar-beet is known for its high salt tolerance and ability to grow in saline or sodic soils. Sugarcane, by contrast, is generally sensitive to high salinity.