🌱 Crop Production and Management – MCQs for Class 8 Science

Part 4: Q76 – Q100

Q76. The scientific practice of agriculture is called:

A) Pisciculture
B) Apiculture
C) Sericulture
D) Agronomy

✅ Correct Answer: D) Agronomy

Explanation:

• A) Pisciculture – Fish rearing.
• B) Apiculture – Bee-keeping.
• C) Sericulture – Silk production.
• D) Agronomy – ✔ Science of crop production.

Q77. Which of the following is a Kharif crop?

A) Wheat
B) Gram
C) Rice
D) Mustard

✅ Correct Answer: C) Rice

Explanation:

• A) Wheat – Rabi.
• B) Gram – Rabi.
• C) Rice – ✔ Kharif, grown in monsoon.
• D) Mustard – Rabi.

Q78. The practice of growing different crops alternately in the same field is called:

A) Mixed cropping
B) Monocropping
C) Crop rotation
D) Harvesting

✅ Correct Answer: C) Crop rotation

Explanation:

• A) Mixed cropping – Two crops together.
• B) Monocropping – Same crop repeatedly.
• C) Crop rotation – ✔ Different crops alternately.
• D) Harvesting – Cutting crops.

Q79. The tool used for loosening soil in large fields with tractors is:

A) Hoe
B) Seed drill
C) Cultivator
D) Funnel

✅ Correct Answer: C) Cultivator

Explanation:

• A) Hoe – Manual tool.
• B) Seed drill – Sowing.
• C) Cultivator – ✔ Tractor-based ploughing tool.
• D) Funnel – Traditional sowing tool.

Q80. Which of these is a leguminous crop?

A) Rice
B) Wheat
C) Gram
D) Maize

✅ Correct Answer: C) Gram

Explanation:

• A) Rice – Non-legume.
• B) Wheat – Non-legume.
• C) Gram – ✔ Legume, fixes nitrogen.
• D) Maize – Non-legume.

Q81. Which irrigation system works like artificial rainfall?

A) Drip irrigation
B) Sprinkler system
C) Canal irrigation
D) Traditional pulley system

✅ Correct Answer: B) Sprinkler system

Explanation:

• A) Drip – Drop by drop.
• B) Sprinkler – ✔ Sprays water like rain.
• C) Canal – Water channels.
• D) Pulley – Traditional water lifting.

Q82. What is the main drawback of traditional irrigation methods?

A) Cheap
B) Easy to use
C) Wastage of water
D) Increase soil fertility

✅ Correct Answer: C) Wastage of water

Explanation:

• A) Cheap – True, but not a drawback.
• B) Easy – Advantage.
• C) Wastage of water – ✔ Main drawback.
• D) Increases fertility – Not true.

Q83. Which process is done after harvesting to separate grains from stalks?

A) Sowing
B) Threshing
C) Winnowing
D) Weeding

✅ Correct Answer: B) Threshing

Explanation:

• A) Sowing – Before crop growth.
• B) Threshing – ✔ Done after harvest.
• C) Winnowing – Separates grain from chaff.
• D) Weeding – Removes weeds.

Q84. Which crop requires standing water for its growth?

A) Wheat
B) Paddy
C) Mustard
D) Barley

✅ Correct Answer: B) Paddy

Explanation:

• A) Wheat – Needs less water.
• B) Paddy – ✔ Requires flooded fields.
• C) Mustard – Winter crop, less water.
• D) Barley – Grows in dry areas.

Q85. Which of these is a Rabi crop?

A) Cotton
B) Mustard
C) Rice
D) Maize

✅ Correct Answer: B) Mustard

Explanation:

• A) Cotton – Kharif/cash crop.
• B) Mustard – ✔ Rabi crop.
• C) Rice – Kharif.
• D) Maize – Kharif.

Q86. Why are silos used?

A) To grow crops
B) To store grains
C) To irrigate fields
D) To remove weeds

✅ Correct Answer: B) To store grains

Explanation:

• A) Grow crops – Not correct.
• B) Store grains – ✔ Main purpose.
• C) Irrigate fields – Not related.
• D) Remove weeds – Not related.

Q87. Which nutrient is NOT supplied by fertilizers?

A) Nitrogen
B) Phosphorus
C) Potassium
D) Humus

✅ Correct Answer: D) Humus

Explanation:

• A) Nitrogen – Supplied.
• B) Phosphorus – Supplied.
• C) Potassium – Supplied.
• D) Humus – ✔ Only manure provides humus.

Q88. Which step ensures that seeds grow into healthy plants?

A) Broadcasting
B) Proper seed selection
C) Transplanting
D) Irrigation

✅ Correct Answer: B) Proper seed selection

Explanation:

• A) Broadcasting – Method, not selection.
• B) Proper seed selection – ✔ Healthy seeds → healthy plants.
• C) Transplanting – Later stage.
• D) Irrigation – Supports growth, not selection.

Q89. Which one is a Kharif crop?

A) Wheat
B) Gram
C) Cotton
D) Mustard

✅ Correct Answer: C) Cotton

Explanation:

• A) Wheat – Rabi.
• B) Gram – Rabi.
• C) Cotton – ✔ Kharif/cash crop.
• D) Mustard – Rabi.

Q90. Which step involves cutting matured crops from the field?

A) Irrigation
B) Harvesting
C) Threshing
D) Storage

✅ Correct Answer: B) Harvesting

Explanation:

• A) Irrigation – Water supply.
• B) Harvesting – ✔ Cutting mature crops.
• C) Threshing – Separation step.
• D) Storage – Keeping grains.

Q91. Which storage pest damages stored grains?

A) Houseflies
B) Rats
C) Termites
D) All of these

✅ Correct Answer: D) All of these

Explanation:

• A) Houseflies – Contaminate grains.
• B) Rats – Eat stored grains.
• C) Termites – Damage bags and grains.
• D) All of these – ✔ Correct.

Q92. Which is an example of biofertilizer?

A) Superphosphate
B) Rhizobium
C) Urea
D) Potash

✅ Correct Answer: B) Rhizobium

Explanation:

• A) Superphosphate – Chemical fertilizer.
• B) Rhizobium – ✔ Natural nitrogen-fixer.
• C) Urea – Synthetic fertilizer.
• D) Potash – Chemical fertilizer.

Q93. Which is the final step of crop production?

A) Storage
B) Harvesting
C) Irrigation
D) Manuring

✅ Correct Answer: A) Storage

Explanation:

• A) Storage – ✔ Last step to keep grains safe.
• B) Harvesting – Second last step.
• C) Irrigation – Middle step.
• D) Manuring – Middle step.

Q94. What is the main benefit of using fertilizers?

A) Quick supply of nutrients
B) Adds humus
C) Cheap
D) Improves soil structure

✅ Correct Answer: A) Quick supply of nutrients

Explanation:

• A) Quick supply – ✔ Main advantage.
• B) Humus – Provided by manure, not fertilizers.
• C) Cheap – Fertilizers are costly.
• D) Improves structure – Manure does that.

Q95. Which of the following practices conserves soil fertility?

A) Overuse of fertilizers
B) Crop rotation
C) Monocropping
D) Excess irrigation

✅ Correct Answer: B) Crop rotation

Explanation:

• A) Overuse – Damages soil.
• B) Crop rotation – ✔ Maintains fertility.
• C) Monocropping – Reduces fertility.
• D) Excess irrigation – Causes salinity.

Q96. Which process removes lighter chaff from grains using air?

A) Sieving
B) Winnowing
C) Hand-picking
D) Threshing

✅ Correct Answer: B) Winnowing

Explanation:

• A) Sieving – For size separation.
• B) Winnowing – ✔ Air separates chaff from grains.
• C) Hand-picking – For larger impurities.
• D) Threshing – Grain from stalk.

Q97. Which one is a Rabi crop?

A) Barley
B) Paddy
C) Maize
D) Jowar

✅ Correct Answer: A) Barley

Explanation:

• A) Barley – ✔ Winter crop (Rabi).
• B) Paddy – Kharif.
• C) Maize – Kharif.
• D) Jowar – Kharif.

Q98. The term “weedicides” refers to:

A) Chemicals that kill insects
B) Chemicals that kill weeds
C) Chemicals that kill rats
D) Chemicals that kill fungi

✅ Correct Answer: B) Chemicals that kill weeds

Explanation:

• A) Insect killers – Insecticides.
• B) Weed killers – ✔ Weedicides.
• C) Rat killers – Rodenticides.
• D) Fungus killers – Fungicides.

Q99. Which process helps in making soil porous and aerated?

A) Irrigation
B) Ploughing
C) Harvesting
D) Storage

✅ Correct Answer: B) Ploughing

Explanation:

• A) Irrigation – Provides water.
• B) Ploughing – ✔ Loosens soil, improves aeration.
• C) Harvesting – Cutting crops.
• D) Storage – Keeping grains.

Q100. Which activity is common in both Kharif and Rabi crop cultivation?

A) Harvesting
B) Sowing
C) Preparation of soil
D) All of these

✅ Correct Answer: D) All of these

Explanation:

• A) Harvesting – Done in both.
• B) Sowing – Done in both.
• C) Soil preparation – Done in both.
• D) All of these – ✔ All steps are common.

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