8th Class Science Crop Production and Management Question Bank

done Crop Production and Management Total Questions - 20

• question_answer1)
  Consider the following statements and select the option which correctly identifies true (T) and false (F) ones.

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

  (ii) Freshly harvested grains must be dried before sowing.

  (iii) Manures are mineral specific as they provide all the minerals needed by plant.

  (iv) Broadcasting of seeds is done by seed drill.

  A)

  (i)	(ii)	(iii)	(iv)
  T	F	F	F

  done clear
  B)

  (i)	(ii)	(iii)	(iv)
  F	T	F	F

  done clear
  C)

  (i)	(ii)	(iii)	(iv)
  T	T	F	F

  done clear
  D)

  (i)	(ii)	(iii)	(iv)
  F	T	F	T

    done clear
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• question_answer2)
  Match different terms in column I with their related description in column II and select the correct option from the codes given below.

  Column I	Column II
  (a) Weeding	(i) Loosening and turning of soil.
  (b) Threshing	(ii) Removing unwanted plants from a field.
  (c) Tilling	(iii) Cutting and gathering of mature crop
  (d) Harvesting	(iv) Separation of grain from the chaff

  A)
  (a) - (i), (b) - (iii), (c) - (ii), (d) - (iv) done clear
  B)
  (a) - (ii), (b) - (i), (c) - (iv), (d) - (iii) done clear
  C)
  (a) - (ii), (b) - (iv), (c) - (i), (d) - (iii) done clear
  D)
  (a) - (iv), (b) - (iii), (c) - (i), (d) - (ii) done clear
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• question_answer3)
  Select the incorrect match.

  (i)   Kharif crop: Paddy and wheat

  (ii) Rabi crop: Mustard and linseed

  (iii) Storage of grains: Silos and granaries

  (iv) Weeds: Amaranthus and Chenopodium

  A)
  (i) only             done clear
  B)
  (ii) and (iii) only done clear
  C)
  (iii) only                       done clear
  D)
  (iii) and (iv) only done clear
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• question_answer4)
  What does the given figure signify?
  A)
  Life cycle of a plant done clear
  B)
  Jhum cultivation done clear
  C)
  Crop rotation done clear
  D)
  Mixed cropping done clear
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• question_answer5)
  Identify the given agricultural tool.
  A)
  Combine                      done clear
  B)
  Hoe     done clear
  C)
  Cultivator                     done clear
  D)
  Seed drill done clear
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• question_answer6)
  Refer to the given Venn diagram and identify X, Y and Z.
  A)

  X-Combine

  Y-Thresher

  Z-Sickle

  done clear
  B)

  X-Combine

  Y-Sickle

  Z-Thresher

  done clear
  C)

  X-Harvester

  Y-Sickle

  Z-Trowel

  done clear
  D)

  X-Sickle

  Y-Trowel

  Z-Harrow

  done clear
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• question_answer7)
  Which of the following is/are incorrect statements) regarding manure?

  (i)  Manure enhances the water holding capacity of the soil.

  (ii) Manure is nutrient specific i.e. supply a particular desired nutrient.

  (iii) Manure decreases the number of friendly microbes.

  (iv) Manure improves the texture of the soil.

  (v) Manure is prepared by the decomposition of dead plant and animal matter.

  A)
  (i), (iii) and (v) only done clear
  B)
  (v) only done clear
  C)
  (ii), (iii), (iv) and (v) only done clear
  D)
  (ii) and (iii) only done clear
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• question_answer8)
  Read the following statements and select the correct option.

  Statement 1: Pheromones are used as biological method to control pest.

  Statement 2: Pheromones lure adult male insects into special traps and prevent them from breeding.

  A)
  Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done clear
  B)
  Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done clear
  C)
  Statement 1 is true but statement 2 is false. done clear
  D)
  Both statements 1 and 2 are false. done clear
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• question_answer9)
  Following are given the differences between manures and fertilisers. Which of the given differences are incorrect?

  	Manures	Fertilisers
  (i)	They are not soluble in water. So they are not easily absorbed by the roots of the plants.	They are soluble in water and are absorbed by the plants easily.
  (ii)	These are inorganic substances.	These are organic substances.
  (iii)	Excessive use does not harm the soil texture, they provide humus to the soil.	Excessive use can change the chemical composition of the soil and also pollutes water.
  (iv)	They restore the soil texture and help in water retention.	They may damage the soil texture.
  (v)	These are nutrient specific.	These are not nutrient specific.

  A)
  (ii) and (v) only done clear
  B)
  (i), (ii) and (v) only done clear
  C)
  (iii) and (iv) only done clear
  D)
  (i), (iii) and (v) only done clear
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• question_answer10)
  Pick the odd one out from each series given below and select the correct option.

  (i)  Chain pump, Dhekli, Drip system, Pulley system

  (ii) Urea, Oxychloride, Potash, Ammonium sulphate

  (iii) Khurpi, Weedicides, Seed drill, Silos

  (iv) Sowing, Irrigation, Hybridisation, Harvesting

  (v) 2, 4-D, MCPA, Butachlor, BHC

                 
  A)

  (i)	(ii)	(iii)	(iv)	(v)
  Dhekli	Urea	Khurpi	Irrigation	Butachlor

                  done clear
  B)

  (i)	(ii)	(iii)	(iv)	(v)
  Drip system	Oxychloride	Silos	Hybridisation	BHC

                  done clear
  C)

  (i)	(ii)	(iii)	(iv)	(v)
  Chain pump	Potash	Seed drill	Sowing	MCPA

                  done clear
  D)

  (i)	(ii)	(iii)	(iv)	(v)
  Dhekli	Urea	Silos	Harvesting	Butachlor

  done clear
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• question_answer11)
  Which among the following are pesticides?

  (i)  Malathion	(ii) Metolachlor
  (iii) Simazine	(iv) MCPA
  (v) Disulfoton	(vi) Gammexane
  (vii) Butachlor	(viii) 2, 4-D
  (ix) Dalapon	(x) Endrin

  A)
  (i), (v), (vi) and (x) only done clear
  B)
  (i), (ii), (iii), (iv) and (ix) only done clear
  C)
  (iv), (vi), (vii), (viii) and (x) only done clear
  D)
  (i), (iii), (v), (vi) and (x) only done clear
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• question_answer12)
  Take a beaker and fill half of it with water. Put some wheat seeds in it, stir it and wait for some time. Which of the following holds true regarding the observation and inference of this experiment?
  A)
  Healthy seeds being lighter float on the surface of water. done clear
  B)
  Damaged seeds being lighter float on the surface of water. done clear
  C)
  Some healthy seeds and some damaged seeds float on the surface of water. done clear
  D)
  Damaged seeds being heavier settle down at the bottom. done clear
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• question_answer13)
  In which of the following agricultural practices, the nutrient requirements of one crop are fulfilled by the other crop?
  A)
                            done clear
  B)
         done clear
  C)
                           done clear
  D)
  Both (a) and (c) done clear
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• question_answer14)
  The period of crop harvesting is celebrated with great joy and happiness in all parts of India. Special festivals are associated with the harvest season. Which among the following group of festivals is associated with harvest season?
  A)
  Pongal, Holi, Diwali, Nabanna done clear
  B)
  Diwali, Christmas, Eid, Pongal done clear
  C)
  Pongal, Eid, Holi, Nabanna done clear
  D)
  Pongal, Baishakhi, Eid, Nabanna done clear
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• question_answer15)
  Crop plants may be attacked by pests which affect the crop production. Fungi are such type of pests which cause diseases like
  A)
  Smut of wheat done clear
  B)
  Citrus canker done clear
  C)
  Blight of potato done clear
  D)
  Both (a) and (c). done clear
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• question_answer16)
  Which of the following statements are correct?

  (i)  Cochineal insect is used to eliminate Opuntia.

  (ii) Water logging decreases the amount of salts in the soil that increases soil fertility.

  (iii) Fertilisers are not readily soluble in water, so they are absorbed by the plants slowly.

  (iv) Rust of wheat is a fungal disease.

  (v) The practice of growing two or more dissimilar crops in the same field one after the other is called mixed cropping.

  A)
  (i), (ii), (iii) and (v) only done clear
  B)
  (i) and (iv) only done clear
  C)
  (ii) and (iv) only done clear
  D)
  (iii), (iv) and (v) only done clear
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• question_answer17)

  The cutting and gathering of crop after it is matured is called X. After this, grains are separated from the crop by a process called Y. Z is the process of separating the hay and chaff from the grains.

  Which of the following statements is/are correct regarding X, Y and Z?

   
  A)
  Z is done with the help of wind in which grains along with husk is allowed to fall from a height. done clear
  B)
  X is done mechanically by combine and manually by plough and harrow. done clear
  C)
  X is the process known as threshing whereas Y is the process known as winnowing. done clear
  D)
  Both (a) and (b) done clear
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• question_answer18)

  A few healthy gram seeds are placed in each of the three pots X, Y and Z containing same type of soil.

  The soil in pot X is mixed with some green leaves. The soil in pot Y is mixed with old cow dung while soil of pot Z is mixed with urea. Pots are watered regularly and given proper environment for plant-growth. Which of the following will be observed after 10 days?

   
  A)
  Lot of growth in Z with replenishment of all the nutrients. done clear
  B)
  Lot of growth in X without replenishment of any nutrient. done clear
  C)
  Lot of growth in V with replenishment of the nutrients. done clear
  D)
  Both (a) and (c) done clear
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• question_answer19)
  The different steps of agricultural practices are given below randomly.

  (i)   Irrigation	(ii) Ploughing
  (iii) Weeding	(iv) Levelling
  (v) Harvesting	(vi) Fertilisers
  (vii) Sowing	(viii) Crop protection
  (ix) Storing seeds

  Which of the following represents the correct sequence of these practices?
  A)
  (ii) - (iv) - (vii) - (i) - (vi) - (iii) - (viii) - (v) - (ix) done clear
  B)
  (iv) - (ii) - (vii) -(i)-(vi)- (iii) -(viii) - (v) - (ix) done clear
  C)
  (ii) - (vii) - (iv) - (iii) - (i) - (v) - (vi) - (viii) - (ix) done clear
  D)
  (iv) - (vii) - (i) - (ii) - (iii) - (viii) - (ix) - (v) - (vi) done clear
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• question_answer20)

  The semi-arid plains of a particular region show a pattern of alternating yellow and black stripes on the ground. The yellow stripes consist of land covered by ripening wheat. The black stripes are bare soil on which no crop is grown but farmers use herbicides or tillage to remove any weeds that try to grow in that region.

  Why do farmers in this region manage soils in this way?

   
  A)
  Farmers put the half of their land to rest for minimising erosion and soil degradation. done clear
  B)
  Farmers discourage transpiration in the wheat plantation by allowing free evaporation from the soil of the bare stripes. done clear
  C)
  Farmers try to store some part of one year's rainwater in the soil under the bare stripes and use that water to supplement the rain on wheat crop planted the next year. done clear
  D)
  All of these done clear
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