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 higher-order MCQs on soil aeration, seed depth, fertilizers, irrigation management, and grain storage 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 agriculture requires careful planning at every stage, from preparing the soil to storing harvested grains. Small mistakes in sowing, irrigation, or storage can significantly reduce crop yield. This practice set contains higher-order reasoning questions that help students understand the scientific principles behind modern farming.

What You Will Learn

✔ Importance of soil aeration

✔ Correct seed sowing depth

✔ Balanced nutrient management

✔ Scientific irrigation planning

✔ Safe grain storage techniques

✔ NCERT concept-based revision

✔ Higher-order reasoning practice

Why This Topic Is Important

Agricultural productivity depends on understanding the scientific reasons behind farming practices. These concepts improve logical thinking and frequently appear in school exams, Olympiads, and scholarship tests.

1. MCQ Questions with Detailed Solutions

Q1. Why should seeds be sown at the proper depth in the soil?

A) To change the crop season

B) Very deep or very shallow sowing may reduce germination

C) To increase weed growth

D) To reduce soil fertility

Answer

B) Very deep or very shallow sowing may reduce germination

Concept Behind This Question

The depth of sowing affects successful germination.

Step-by-Step Solution

If seeds are sown too deep, seedlings may not reach the soil surface. If they are too close to the surface, they may dry out or be eaten by birds. Proper depth ensures healthy germination.

Therefore, the correct answer is B.

Exam Tip

Proper Depth = Better Germination

Q2. What is the main advantage of loosening the soil before sowing?

A) It decreases air circulation.

B) It allows roots to breathe and grow deeper.

C) It increases soil hardness.

D) It removes all nutrients.

Answer

B) It allows roots to breathe and grow deeper.

Concept Behind This Question

Plant roots require air and loose soil for healthy growth.

Step-by-Step Solution

Loose soil contains air spaces that help roots respire. It also allows roots to penetrate deeper and absorb more water and nutrients.

Therefore, the correct answer is B.

Exam Tip

Loose Soil = Strong Root System

Q3. A farmer notices that his crop has healthy green leaves but very few grains. Which agricultural practice should be improved?

A) Balanced use of fertilizers

B) Increasing weed growth

C) Delaying harvesting indefinitely

D) Reducing irrigation completely

Answer

A) Balanced use of fertilizers

Concept Behind This Question

Excess nitrogen encourages leaf growth but balanced nutrients are needed for overall crop development.

Step-by-Step Solution

Too much nitrogen promotes leafy growth, while phosphorus and potassium are also needed for flowering, grain formation, and healthy crop development. Balanced fertilizer application gives better yield.

Therefore, the correct answer is A.

Exam Tip

Balanced Nutrients = Balanced Plant Growth

Q4. Which irrigation practice helps prevent unnecessary wastage of water?

A) Irrigating fields only when required

B) Keeping fields flooded throughout the season

C) Irrigating during heavy rainfall

D) Watering crops every hour

Answer

A) Irrigating fields only when required

Concept Behind This Question

Efficient irrigation depends on crop requirement.

Step-by-Step Solution

Over-irrigation wastes water, damages roots, and may reduce soil fertility. Water should be supplied only according to the crop’s needs.

Therefore, the correct answer is A.

Exam Tip

Need-Based Irrigation Saves Water

Q5. Which storage practice is most effective in reducing insect damage to grains?

A) Storing moist grains in open bags

B) Cleaning and drying grains before storage

C) Leaving grains uncovered in the field

D) Mixing fresh and spoiled grains together

Answer

B) Cleaning and drying grains before storage

Concept Behind This Question

Proper storage begins before grains are stored.

Step-by-Step Solution

Cleaning removes impurities, while drying lowers moisture content. This reduces the chances of insect attack and fungal growth during storage.

Therefore, the correct answer is B.

Exam Tip

Clean + Dry Grains = Better Storage

Important Formulas & Concepts

1. Proper Seed Depth

Correct sowing depth:

• Improves germination
• Protects seeds
• Encourages healthy seedling growth

2. Soil Aeration

Benefits:

• Better root respiration
• Healthy root growth
• Improved nutrient absorption

3. Balanced Fertilizer Application

Plants require balanced nutrients such as:

• Nitrogen (N)
• Phosphorus (P)
• Potassium (K)

4. Efficient Irrigation

Water should be supplied:

• According to crop needs
• At the proper time
• Without wastage

5. Safe Grain Storage

Before storage:

• Clean grains
• Dry grains
• Store in moisture-free containers

Related Practice Questions

1. Why is proper seed depth important?
2. Explain the importance of soil aeration.
3. Why should fertilizers be applied in balanced quantities?
4. What is need-based irrigation?
5. How can insect damage to stored grains be reduced?

Mini Quiz Challenge

Fill in the blanks

1. Loose soil improves root __________.
2. Plants require balanced __________ for healthy growth.
3. Grains should be __________ before storage.

Answers

1. Growth
2. Nutrients
3. Dried

Exam Tips

✔ Understand the importance of proper sowing depth.

✔ Revise the benefits of soil aeration.

✔ Learn the functions of major plant nutrients.

✔ Practice reasoning-based irrigation questions.

✔ Remember proper grain storage methods.

Quick Revision Notes

✔ Proper seed depth improves germination.

✔ Loose soil supports root growth.

✔ Nitrogen, phosphorus, and potassium are essential nutrients.

✔ Over-irrigation wastes water.

✔ Dry grains before storage.

✔ Balanced nutrition improves crop yield.

✔ Scientific farming increases productivity.

✔ Proper storage minimizes post-harvest losses.

Common Mistakes Students Make

❌ Thinking deeper sowing always gives better germination.

❌ Confusing soil aeration with irrigation.

❌ Believing excess fertilizer always increases yield.

❌ Ignoring the harmful effects of over-irrigation.

❌ Storing grains without drying them properly.

Key Takeaways

✔ Proper sowing depth improves seed germination.

✔ Soil aeration promotes healthy root development.

✔ Balanced fertilizers improve crop production.

✔ Irrigation should be based on crop requirements.

✔ Clean and dry grains remain safe during storage.

✔ Scientific agricultural practices reduce losses.

✔ Sustainable farming improves long-term productivity.

FAQs

1. Why should seeds be sown at the correct depth?

Correct depth improves germination and protects seeds from drying or being eaten by birds.

2. Why is soil aeration important?

It provides oxygen to roots and helps them grow deeper.

3. Why should fertilizers be used in balanced amounts?

Balanced nutrients support healthy growth, flowering, and grain production.

4. What is need-based irrigation?

It means supplying water only when crops actually require it.

5. Why should grains be cleaned before storage?

Cleaning removes impurities and reduces the risk of insect infestation.

Conclusion

Practice Set 9 strengthens students’ understanding of advanced agricultural concepts such as seed depth, soil aeration, balanced fertilizers, efficient irrigation, and grain storage. These higher-order NCERT-based MCQs improve reasoning ability and help students prepare confidently for school examinations, Olympiads, and scholarship tests. Regular concept-based practice is essential for achieving excellent results.

Related links

• Class 8 Maths Chapter 3 Understanding Quadrilaterals part-19
• Class 8 English Chapter 1 Another Chance part-3
• Class 8 Social Science Chapter 1 How, When and Where part-6
• Class 8 Science Chapter 1 Crop Production and Management part-5
• Class 8 Maths Chapter 3 Understanding Quadrilaterals part-18
• Class 8 Social Science Chapter 1 How, When and Where part-5
• Class 8 Maths Chapter 3 Understanding Quadrilaterals part-17
• 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

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