Tag: biology

Questions Related to biology

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

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

  1. Tungrovirus disease

  2. Spotted bole worm and dried disease

  3. Mosaic disease

  4. None of the above

Show answer
Correct Option: A
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'.

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.    

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

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

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

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

  4. (i), (ii), (iv), (vii)

Show answer
Correct Option: A
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.

Growing two or more crops in definite row pattern is called

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

  1. Crop rotation

  2. Inter-cropping

  3. Mixed cropping

  4. Intra-cropping

Show answer
Correct Option: B
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'.

Horti-pastoral farming refers to

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

  1. Growing food and fodder

  2. Growing mixed crops

  3. Growing fodder and rearing cattle

  4. Growing fruit trees and fodder simultaneously

Show answer
Correct Option: D
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.

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

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

  1. Intercropping

  2. Crop rotation

  3. Mixed farming

  4. Mixed cropping

Show answer
Correct Option: A
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.

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

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

  1. Similar

  2. Different

  3. No change

  4. None of these

Show answer
Correct Option: B

Mixed cropping ______

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

  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

Show answer
Correct Option: C

Advantages of inter-cropping

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

  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

Show answer
Correct Option: D

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

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

  1. Crop rotation

  2. Mixed cropping

  3. Terrace farming

  4. All of the above

Show answer
Correct Option: B
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'.

Mixed farming referred only to ________________.

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

  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

Show answer
Correct Option: C
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.