Class 8 Science Chapter 1 Crop Production and Management

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Practice Class 8 Science Chapter 1 Crop Production and Management MCQ Questions with Answers based on the latest NCERT syllabus. Solve important reasoning-based MCQs on soil nutrients, compost, crop protection, irrigation sources, and combine harvesters with detailed solutions for CBSE, State Board, Olympiad, and scholarship exam preparation.

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Chapter Information

Subject: Science

Class: 8

Chapter: Crop Production and Management

Question Type: Multiple Choice Questions (MCQs)

Difficulty Level: Moderate to Difficult

Based On: NCERT Latest Syllabus (2026)

Introduction

Scientific farming involves proper management of soil nutrients, irrigation, crop protection, harvesting, and storage. Farmers use different techniques and machines to improve productivity while conserving natural resources. This practice set focuses on application-based questions to strengthen students’ conceptual understanding of NCERT topics.

What You Will Learn

✔ Importance of compost

✔ Sources of irrigation water

✔ Crop protection methods

✔ Function of combine harvesters

✔ Soil nutrient management

✔ NCERT concept-based revision

✔ Higher-order reasoning practice

Why This Topic Is Important

Healthy crops depend on fertile soil, sufficient water, and proper protection from pests and diseases. Modern agricultural machinery and scientific farming practices help farmers produce more food efficiently. These concepts are important for school examinations as well as Olympiad-level questions.

1. MCQ Questions with Detailed Solutions

Q1. Which agricultural practice helps return organic matter to the soil naturally?

A) Applying compost

B) Burning crop residues

C) Increasing pesticide use

D) Continuous irrigation

Answer

A) Applying compost

Concept Behind This Question

Compost is a natural source of organic matter.

Step-by-Step Solution

Compost is prepared from decomposed plant and animal waste. It enriches the soil with humus, improves soil texture, and increases water-holding capacity without harming the environment.

Therefore, the correct answer is A.

Exam Tip

Compost naturally improves soil health.

Q2. Which of the following is NOT a common source of irrigation water?

A) Wells

B) Rivers

C) Ponds

D) Moonlight

Answer

D) Moonlight

Concept Behind This Question

Farmers depend on natural and artificial water sources for irrigation.

Step-by-Step Solution

Common irrigation sources include wells, rivers, ponds, lakes, canals, and tube wells. Moonlight has no role in supplying water for irrigation.

Therefore, the correct answer is D.

Exam Tip

Remember common irrigation sources given in NCERT.

Q3. Which farming practice helps protect crops from insects and diseases?

A) Harvesting

B) Crop protection

C) Winnowing

D) Threshing

Answer

B) Crop protection

Concept Behind This Question

Healthy crops require protection throughout their growth.

Step-by-Step Solution

Farmers protect crops by removing weeds, controlling pests, preventing diseases, and following proper agricultural practices. These measures help improve both crop quality and yield.

Therefore, the correct answer is B.

Exam Tip

Crop protection prevents yield loss.

Q4. Which machine performs harvesting as well as threshing?

A) Hoe

B) Seed Drill

C) Combine Harvester

D) Plough

Answer

C) Combine Harvester

Concept Behind This Question

Modern agricultural machines save both time and labour.

Step-by-Step Solution

A combine harvester performs two important operations in one machine—it harvests mature crops and separates the grains from the stalks through threshing.

Therefore, the correct answer is C.

Exam Tip

Combine Harvester = Harvesting + Threshing

Q5. Why should farmers replenish soil nutrients regularly?

A) Soil nutrients are used up by growing crops.

B) To reduce seed germination.

C) To increase weed growth.

D) To prevent rainfall.

Answer

A) Soil nutrients are used up by growing crops.

Concept Behind This Question

Growing crops continuously removes nutrients from the soil.

Step-by-Step Solution

Plants absorb nutrients such as nitrogen, phosphorus, and potassium from the soil during growth. These nutrients must be replenished through manure or fertilizers to maintain soil fertility.

Therefore, the correct answer is A.

Exam Tip

Continuous cropping depletes soil nutrients.

Important Formulas & Concepts

1. Compost

Compost is an organic manure prepared from decomposed plant and animal waste.

Benefits:

• Adds humus
• Improves soil fertility
• Increases water-holding capacity

2. Sources of Irrigation

Common sources include:

• Wells
• Tube Wells
• Rivers
• Lakes
• Ponds
• Canals

3. Crop Protection

Includes:

• Weed control
• Pest management
• Disease prevention

4. Combine Harvester

A machine that performs:

• Harvesting
• Threshing

at the same time.

5. Soil Nutrient Replenishment

Nutrients removed by crops should be replaced through:

• Manure
• Fertilizers

Related Practice Questions

1. What is compost and how is it prepared?
2. Name four common sources of irrigation.
3. Why is crop protection important?
4. What are the functions of a combine harvester?
5. Why do soil nutrients need replenishment?

Mini Quiz Challenge

Fill in the blanks

1. Compost adds __________ to the soil.
2. A __________ harvester performs harvesting and threshing.
3. Crops absorb __________ from the soil during growth.

Answers

1. Humus
2. Combine
3. Nutrients

Exam Tips

✔ Revise the advantages of compost.

✔ Remember all common irrigation sources.

✔ Learn the functions of a combine harvester.

✔ Understand why soil nutrients decrease.

✔ Focus on concept-based NCERT questions.

Quick Revision Notes

✔ Compost is a natural manure.

✔ Wells and canals are irrigation sources.

✔ Crop protection reduces losses.

✔ Combine harvesters save time and labour.

✔ Soil nutrients decrease after every crop.

✔ Manure and fertilizers restore nutrients.

✔ Healthy soil supports healthy crops.

✔ Scientific farming improves productivity.

Common Mistakes Students Make

❌ Confusing compost with chemical fertilizers.

❌ Forgetting that tube wells are irrigation sources.

❌ Thinking harvesting and threshing are always separate operations.

❌ Assuming soil nutrients never decrease.

❌ Ignoring the importance of crop protection.

Key Takeaways

✔ Compost naturally enriches the soil.

✔ Irrigation water comes from different natural and artificial sources.

✔ Crop protection improves crop quality and yield.

✔ A combine harvester performs harvesting and threshing together.

✔ Soil nutrients must be replenished after every crop.

✔ Scientific farming ensures sustainable agriculture.

✔ Proper soil management increases food production.

FAQs

1. What is compost?

Compost is an organic manure prepared from decomposed plant and animal waste.

2. Name two common irrigation sources.

Wells and canals are common irrigation sources.

3. What is crop protection?

Crop protection includes measures taken to protect crops from weeds, pests, and diseases.

4. What does a combine harvester do?

It performs harvesting and threshing in a single operation.

5. Why should soil nutrients be replenished?

Because crops continuously absorb nutrients from the soil during growth.

Conclusion

Practice Set 8 focuses on important concepts such as compost, irrigation sources, crop protection, soil nutrient management, and combine harvesters. These reasoning-based NCERT MCQs help students develop conceptual understanding and prepare effectively for school examinations, Olympiads, and scholarship tests. Regular revision of these concepts will improve confidence and academic performance.

Related links

• Class 8 Maths Chapter 3 Understanding Quadrilaterals part-18
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• Class 8 Science Chapter 1 Crop Production and Management part-4
• Class 8 English Chapter 1 Another Chance part-2
• Class 8 Science Chapter 1 Crop Production and Management part-3
• Class 8 Social Science Chapter 1 How, When and Where part-4
• Class 8 Maths Chapter 3 Understanding Quadrilaterals part-16
• Class 8 Social Science Chapter 1 How, When and Where part-3
• Class 8 Science Chapter 1 Crop Production and Management part-2
• Class 8 Maths Chapter 3 Understanding Quadrilaterals part-15
• Class 8 English Chapter 1 Another Chance part-1
• Class 8 Social Science Chapter 1 How, When and Where part-2

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