Tag: biology

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Multiple choice biology sustainable agriculture patterns of cropping rotation of crops cropping patterns common irrigation systems

Which of the following disease in paddy crop is prevented by cultivating black gram or groundnut after paddy? 

  1. Tungrovirus disease

  2. Spotted bole worm and dried disease

  3. Mosaic disease

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A.Tungro virus disease is transmitted by leafhoppers, wherein the most efficient vector is the green leafhopper,

B. Spotted bole worm and dried disease - This causes drying and shedding of terminal shoots before flowering. ... Damage is caused by the larvae of the spotted bollworm, Earias vittella, a common pest.

C.Mosaic viruses are plant viruses that cause the leaves to have a speckled appearance

So, the correct option is 'Tungro virus disease'.
Multiple choice biology sustainable agriculture patterns of cropping rotation of crops cropping patterns common irrigation systems

Which of the following statements is/are correct regarding mixed cropping

(I) There is a definite pattern of sowing seeds.
(ii) It increases biodiversity.
 (iii) It removes some nutrients specifically
 (iv) Outbreaks of pests and diseases can spread very rapidly.
 (v) The crops with different maturation times are grown together. 
 (vi) Same fertilizers and pesticides are used for all crops
 (vii) The risk of total crop failure due to uncertain monsoon is reduced.    

  1. (ii), (v), (vi), (vii)

  2. (i), (ii), (v), (vi)

  3. (iii), (iv), (v), (vi)

  4. (i), (ii), (iv), (vii)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Mixed cropping is also known as polyculture, inter-cropping or co-cultivation.
  • It is a type of agriculture technique in which two or more plants are planted simultaneously in the same field, interlinking the crops so that they grow together.
  • Benefits of mixed cropping are:-
(1) It saves space as crops in the same field might ripen at different seasons.
(2) It provides various environmental benefits.
(3) A balance of input and outgo of soil nutrients.
(4) It helps in the suppression of plant diseases, suppression of weeds and insect pests.
(5) The risk of total crop failure due to uncertain monsoon is reduced.    

The correct answer is OPTION A.

Multiple choice biology sustainable agriculture patterns of cropping rotation of crops cropping patterns common irrigation systems

Growing two or more crops in definite row pattern is called

  1. Crop rotation

  2. Inter-cropping

  3. Mixed cropping

  4. Intra-cropping
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Inter-cropping is growing two or more crops simultaneously on the same field in a definite pattern. A few rows of one crop alternate with a few rows of a second crop. The crops are selected such that their nutrient requirements are different. This ensures maximum utilization of the nutrients supplied, and also prevents pests and diseases from spreading to all the plants belonging to one crop in a field. Thus, both crops give better returns.
So, the correct answer is 'Inter-cropping'.
Multiple choice biology sustainable agriculture patterns of cropping rotation of crops cropping patterns common irrigation systems

Horti-pastoral farming refers to

  1. Growing food and fodder

  2. Growing mixed crops

  3. Growing fodder and rearing cattle

  4. Growing fruit trees and fodder simultaneously
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Growing fodder grass for cattle along with fruit trees or growing fruit trees while rearing cattle is known as horti-pastoral farming. It is adopted as an alternative land use system in North India. Thus, the correct answer is option D.

Multiple choice biology sustainable agriculture patterns of cropping rotation of crops cropping patterns common irrigation systems

Growing two or more crops but in definite row pattern is known as

  1. Intercropping

  2. Crop rotation

  3. Mixed farming

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

A- Inter cropping is farming in which two or more crops are grown together indefinite pattern at same time on same piece of land for greater yield. Inter cropping maintains soil fertility and reduces soil erosion and depletion.

Multiple choice biology sustainable agriculture patterns of cropping rotation of crops cropping patterns common irrigation systems

The crops are selected for inter-cropping and their nutrient requirements are _____

  1. Similar

  2. Different

  3. No change

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

Inter-cropping involves growing two or more crops simultaneously on the same field. To minimize competition for resources like nutrients, crops with different nutrient requirements are selected.

Multiple choice biology sustainable agriculture patterns of cropping rotation of crops cropping patterns common irrigation systems

Mixed cropping ______

  1. Reduces risk

  2. Gives some insurance against failure of one of the crop

  3. Both options a and b are correct

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

Mixed cropping involves growing two or more crops together without a definite row pattern. This practice reduces the risk of total crop failure if one crop fails due to pests or weather, providing a form of insurance.

Multiple choice biology sustainable agriculture patterns of cropping rotation of crops cropping patterns common irrigation systems

Advantages of inter-cropping

  1. It makes better use of natural resources, sunlight, land and water

  2. Soil erosion is effectively arrested

  3. The produce of each crop can be marketed and consumed separately

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

Inter-cropping optimizes the use of natural resources (sunlight, water, land), helps prevent soil erosion by providing better ground cover, and allows for separate harvesting and marketing of the different crops.

Multiple choice biology sustainable agriculture patterns of cropping rotation of crops cropping patterns common irrigation systems

.......... is growing of two or more crops simultaneously on the same piece of land.

  1. Crop rotation

  2. Mixed cropping

  3. Terrace farming

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

Mixed cropping is a system of planting two crops at a time on the same land. It is also known as polyculture i.e two types of crops are sown and irrigated at a time. The benefits of mixed cropping are that the plant will get nutrients from the soils.

So, the correct option is ' Mixed cropping'.

Multiple choice biology sustainable agriculture patterns of cropping rotation of crops cropping patterns common irrigation systems

Mixed farming referred only to ________________.

  1. Growing of crop together by mixing the seeds

  2. Growing of cash crops and food grains together

  3. Crop production combined with dairy farming at farm

  4. Growing of fruits and vegetable mixed
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Explanation: Mixed farming is an agrarian system that mixes arable farming with the raising of livestock at the same time. When on a farm along-with crop production, some other agriculture based practice like poultry, dairy farming or bee keeping etc. is adopted, then this system of farming is known as mixed farming.