Tag: improvement in food resources

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Questions Related to improvement in food resources

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

Growing different crops in different seasons in the same field will deplete the soil of nutrients.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The particular type of plants requires certain set of nutrients. For example, sugarcane requires a large amount of nitrogen. Also, some plants render the soil with some nutrients. For example, leguminous plants make soil nitrogen rich. 
If crop rotation is carried out then the soil will not deplete with certain nutrients. Hence, growing different crops in different seasons in the same field will be beneficial for economy as well as for soil quality too.

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

"Monoculture of commercially viable trees is destroying the unique natural profile of ___________ Thoughtless exploitation of timber, deforesting vast tracts for palm cultivation, destruction of mangroves, illegal logging by tribals and poaching only compound the problem. Fresh water packets are fast drying up due to deforestation and destruction of mangroves." The place referred to in this quotation is

  1. Orissa coast

  2. Kerala coast

  3. Sunderbans

  4. Andaman and Nicobar Islands
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Sundarbans is a mangrove zone in the delta shaped by the juncture of Ganges, In spite of safeguarding duties from the two Governments, the Sunderbans are under danger from both normal and human-made causes.

So, the correct option is 'Sunderbans'.

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

Cereals and legumes are cultivated alternatively in crop rotation process by a farmer. Which of the following are advantages of cultivating cereals and legumes alternatively?

  1. When cereals are cultivated more nutrients are utilized

  2. If legumes are grown in the soil, less nutrients are utilized

  3. Legumes synthesize some nutrients as they have root nodules

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Cultivation of cereals followed legumes in a cultivated soil is called crop rotation. In this, Legumes have bacteria on nodules which are on the roots of the plant. The bacteria on the nodules takes nitrogen from the air and fixes it into the soil, so that other plants that require nitrogen can use it as well.  Farmers use soybeans and other legumes in rotations with grass crops such as corn or wheat. Grass crops are unable to take their own nitrogen from the air so they either need the nitrogen in the soil that the legumes provide for them in a crop rotation or they need a chemical fertilizer containing nitrogen. 
So the correct option is ' All of the above ' .
Multiple choice evs improvement in food resources crop yield improvement food supply crop improvement methods and organisations

Which of the following is not a characteristic of mixed cropping?

  1. Minimize risk of crop failure

  2. Set pattern of rows

  3. Harvesting and threshing crops separately is not possible

  4. Individual marketing and consumption of crop is not possible
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mixed cropping is a type of cultivation in which two types of crops are grown at a time and in the same piece of land. It is a form of polyculture. The characteristic of mixed cropping is balancing the nutrient level on soil, suppression of weed and insect pests, minimize the risk of crop failure etc.

So, the correct option is 'Individual marketing and consumption of crop is not possible'.

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

Gundhi bug is a pest of 

  1. rice

  2. mustard

  3. wheat

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

Gundhi bug is a pest of rice. Its a small insect which attacks the ripening rice grains and make wither away. It sucks the milk from developing grains and stem in early stage of grain formation which causes foul smell in the field.

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

The method of growing different crops alternatively on same piece of land is called _______________.

  1. Mixed cropping

  2. Multiple cropping

  3. Rotation cropping

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

The method of growing different crops alternatively on same piece of land is called rotation cropping. This helps in maintaining or improving the fertility of soil.

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

Improper use of land converts fertile land into unusable land.

  1. True

  2. False

  3. Nither

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

Improper land use through overcultivation, overgrazing, or poor irrigation leads to soil degradation, converting fertile land into unusable barren land. This is a well-established principle in soil science and agricultural management.

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

In breeding a new genetic variety of a crop by hybridisation, superior recombinants are self pollinated for several generations till they reach a state of 

  1. Uniformity

  2. Heterozygosity

  3. Homozygosity

  4. Both (1) and (3)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

After the hybridization of two selected parent plant species, the recombinants with the desired combination of characters are selected. These hybrids are then self-pollinated for several generations so that they reach a state of uniformity or homozygosity so that the desired characters will not segregate in the progeny.

(Uniformity and Homozygosity are synonymous for the state of possessing two similar alleles for the same genes, one acquired from each parent.)
So, the correct answer is 'Uniformity' and 'Homozygosity'.

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

An improved insect resistant variety "Pusa Gaurav" is variety of _________

  1. <p> <font face="Times, serif">Brassica</font></p>

  2. Flat bean

  3. Cow pea

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

Pusa Gaurav is an insect resistant variety of Mustard or Brassica that shows resistant against the aphids.

Hence, the correct answer is 'Brassica'