🌱 Crop Production and Management – MCQs for Class 8 Science

Part 1: Q1 – Q25

Q1. The process of loosening and turning the soil is called:

A) Sowing
B) Irrigation
C) Ploughing
D) Weeding

✅ Correct Answer: C) Ploughing

Explanation:

• A) Sowing – Process of putting seeds in the soil.
• B) Irrigation – Providing water to crops.
• C) Ploughing – ✔ Loosens soil, improves aeration, helps root penetration.
• D) Weeding – Removing unwanted plants, not related to loosening soil.

Q2. The first step before growing a crop is:

A) Irrigation
B) Preparation of soil
C) Adding fertilizers
D) Harvesting

✅ Correct Answer: B) Preparation of soil

Explanation:

• A) Irrigation – Done later.
• B) Preparation of soil – ✔ First step to loosen and nourish soil.
• C) Adding fertilizers – Happens after soil prep.
• D) Harvesting – Last stage of crop production.

Q3. Which tool is used for ploughing traditionally?

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

✅ Correct Answer: C) Plough

Explanation:

• A) Hoe – Used for weeding/loosening soil, not main ploughing.
• B) Seed drill – For sowing seeds.
• C) Plough – ✔ Traditional tool made of wood/iron, drawn by animals.
• D) Cultivator – Modern tool attached to tractors.

Q4. The modern tool used for sowing seeds is:

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

✅ Correct Answer: C) Seed drill

Explanation:

• A) Hoe – For weeds.
• B) Funnel – Traditional sowing tool.
• C) Seed drill – ✔ Ensures uniform sowing, correct depth, spacing.
• D) Plough – Not for sowing.

Q5. Which is NOT a Rabi crop?

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

✅ Correct Answer: D) Paddy

Explanation:

• A) Wheat – Rabi crop (winter).
• B) Mustard – Rabi crop.
• C) Gram – Rabi crop.
• D) Paddy – ✔ Kharif crop (monsoon).

Q6. The method of watering crops drop by drop near the roots is called:

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

✅ Correct Answer: D) Drip irrigation

Explanation:

• A) Canal irrigation – Wastes water.
• B) Sprinkler irrigation – Sprays water like rainfall.
• C) Traditional irrigation – Old and wasteful.
• D) Drip irrigation – ✔ Conserves water, efficient.

Q7. Which of the following adds humus to soil?

A) Fertilizers
B) Manure
C) Pesticides
D) Weedicides

✅ Correct Answer: B) Manure

Explanation:

• A) Fertilizers – Provide nutrients but no humus.
• B) Manure – ✔ Organic matter, increases humus and soil fertility.
• C) Pesticides – Kill pests, no humus.
• D) Weedicides – Kill weeds, not for soil fertility.

Q8. Which one is a Kharif crop?

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

✅ Correct Answer: C) Paddy

Explanation:

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

Q9. What is winnowing?

A) Separation of weeds from crops
B) Cutting crops
C) Separation of grains from chaff
D) Removing stones from grains

✅ Correct Answer: C) Separation of grains from chaff

Explanation:

• A) Separation of weeds – Weeding.
• B) Cutting crops – Harvesting.
• C) Separation of grains from chaff – ✔ Done by wind.
• D) Removing stones – Hand-picking.

Q10. Which process removes weeds?

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

✅ Correct Answer: A) Weeding

Explanation:

• A) Weeding – ✔ Unwanted plants removed.
• B) Harvesting – Cutting crops.
• C) Threshing – Grain from stalk.
• D) Irrigation – Providing water.

Q11. The tool used to remove weeds is:

A) Hoe
B) Plough
C) Seed drill
D) Sprinkler

✅ Correct Answer: A) Hoe

Explanation:

• A) Hoe – ✔ Uproots weeds, loosens soil.
• B) Plough – Loosens soil, not weeds directly.
• C) Seed drill – For sowing.
• D) Sprinkler – For irrigation.

Q12. The process of separating grain from the stalk is called:

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

✅ Correct Answer: B) Threshing

Explanation:

• A) Winnowing – Grain from chaff.
• B) Threshing – ✔ Grain from stalk, after harvesting.
• C) Weeding – Removal of weeds.
• D) Sowing – Planting seeds.

Q13. Which of the following is a natural fertilizer?

A) Urea
B) Manure
C) DAP
D) Superphosphate

✅ Correct Answer: B) Manure

Explanation:

• A) Urea – Chemical fertilizer.
• B) Manure – ✔ Natural, improves soil quality.
• C) DAP – Chemical fertilizer.
• D) Superphosphate – Chemical fertilizer.

Q14. Which is a modern method of irrigation?

A) Persian wheel
B) Drip irrigation
C) Pulley system
D) Chain pump

✅ Correct Answer: B) Drip irrigation

Explanation:

• A) Persian wheel – Traditional method.
• B) Drip irrigation – ✔ Modern, conserves water.
• C) Pulley system – Traditional.
• D) Chain pump – Traditional.

Q15. Which bacteria help in nitrogen fixation?

A) Lactobacillus
B) Rhizobium
C) Salmonella
D) Streptococcus

✅ Correct Answer: B) Rhizobium

Explanation:

• A) Lactobacillus – Makes curd.
• B) Rhizobium – ✔ Lives in legume roots, fixes nitrogen.
• C) Salmonella – Causes disease.
• D) Streptococcus – Bacteria, not nitrogen-fixing.

Q16. Which method protects crops from pests?

A) Irrigation
B) Manuring
C) Pesticides
D) Weeding

✅ Correct Answer: C) Pesticides

Explanation:

• A) Irrigation – Supplies water.
• B) Manuring – Adds nutrients.
• C) Pesticides – ✔ Kill harmful insects/pests.
• D) Weeding – Removes weeds, not pests.

Q17. Which gas is fixed in soil by Rhizobium?

A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Hydrogen

✅ Correct Answer: B) Nitrogen

Explanation:

• A) Oxygen – Not fixed.
• B) Nitrogen – ✔ Converted into usable form by Rhizobium.
• C) Carbon dioxide – Used in photosynthesis, not fixed in soil.
• D) Hydrogen – Not relevant.

Q18. Sprinkler irrigation is most suitable for:

A) Sandy soil
B) Loamy soil
C) Clayey soil
D) Marshy soil

✅ Correct Answer: A) Sandy soil

Explanation:

• A) Sandy soil – ✔ Water spreads evenly.
• B) Loamy soil – Not very effective.
• C) Clayey soil – Causes waterlogging.
• D) Marshy soil – Already wet.

Q19. Which machine is used for sowing seeds with tractors?

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

✅ Correct Answer: B) Seed drill

Explanation:

• A) Hoe – Manual.
• B) Seed drill – ✔ Tractor-driven, efficient sowing.
• C) Plough – Prepares soil.
• D) Funnel – Traditional sowing.

Q20. Which process is done to cut mature crops?

A) Weeding
B) Irrigation
C) Harvesting
D) Sowing

✅ Correct Answer: C) Harvesting

Explanation:

• A) Weeding – Removing weeds.
• B) Irrigation – Watering.
• C) Harvesting – ✔ Cutting matured crops.
• D) Sowing – Planting seeds.

Q21. What is crop rotation?

A) Growing crops in circular fields
B) Changing crops season by season
C) Growing two crops together
D) Harvesting crops in rotation

✅ Correct Answer: B) Changing crops season by season

Explanation:

• A) Circular fields – Wrong idea.
• B) Changing crops season by season – ✔ Maintains soil fertility.
• **C) Two crops together – That is mixed cropping.
• **D) Harvesting rotation – Not correct.

Q22. Which machine is used for threshing at large scale?

A) Tractor
B) Combine harvester
C) Plough
D) Hoe

✅ Correct Answer: B) Combine harvester

Explanation:

• A) Tractor – Vehicle, not threshing.
• B) Combine harvester – ✔ Cuts, threshes, winnows together.
• C) Plough – Prepares soil.
• D) Hoe – Removes weeds.

Q23. Fertilizers are:

A) Organic substances
B) Rich in humus
C) Chemical substances
D) Weedicides

✅ Correct Answer: C) Chemical substances

Explanation:

• A) Organic substances – Manure is organic, not fertilizers.
• B) Humus – Manure adds humus.
• C) Chemical substances – ✔ Fertilizers are chemicals (urea, NPK).
• D) Weedicides – Different purpose.

Q24. Which process involves storing grains in silos?

A) Harvesting
B) Storage
C) Weeding
D) Sowing

✅ Correct Answer: B) Storage

Explanation:

• A) Harvesting – Cutting crops.
• B) Storage – ✔ Protects grains in silos, granaries.
• C) Weeding – Removing weeds.
• D) Sowing – Planting seeds.

Q25. Which of the following is a Rabi crop?

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

✅ Correct Answer: B) Wheat

Explanation:

• A) Rice – Kharif crop.
• B) Wheat – ✔ Rabi crop (winter).
• C) Maize – Kharif crop.
• D) Groundnut – Kharif crop.

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