Class 8 Exam > Class 8 Notes > Science Class 8 > Unit Test: Crop Production and Management
Unit Test: Crop Production and Management | Science Class 8 PDF Download
Time: 1 hour
M.M. 30
Attempt all questions.
- Question numbers 1 to 5 carry 1 mark each.
- Question numbers 6 to 8 carry 2 marks each.
- Question numbers 9 to 11 carry 3 marks each.
- Question number 12 & 13 carry 5 marks each
Q1: Which of the following is a Rabi crop? (1 Mark)
(i) Paddy
(ii) Maize
(iii) Gram
(iv) Cotton
Q2: The process of loosening and turning the soil is called ___________. (1 Mark)
(i) Sowing
(ii) Irrigation
(iii) Harvesting
(iv) Ploughing
Q3: Which of the following is used to add nutrients to the soil? (1 Mark)
(i) Weedicides
(ii) Fertilizers
(iii) Pesticides
(iv) Herbicides
Q4: ___________ is the technique where seeds are sown at appropriate depths and distances using machinery. (1 Mark)
(i) Broadcasting
(ii) Seed Drill
(iii) Hand Sowing
(iv) Ploughing
Q5: Irrigation is important because it helps in ___________. (1 Mark)
(i) Providing moisture to the soil
(ii) Protecting crops from frost
(iii) Increasing the soil temperature
(iv) All of the above
Q6: What is crop rotation and why is it beneficial? (2 Marks)
Q7: Explain the role of manure in agriculture. (2 Marks)
Q8: What are weeds, and why is their removal important in crop fields? (2 Marks)
Q9: What are the main steps involved in the preparation of soil before sowing? (3 Marks)
Q10: Describe the process of harvesting and threshing. (3 Marks)
Q11: Differentiate between manure and fertilizers in terms of their composition and effects on the soil. (3 Marks)
Q12: Explain the methods used for protecting crops from pests and diseases. Why is pest control important in agriculture? (5 Marks)
Q13: Describe the modern methods of irrigation and their advantages over traditional methods. (5 Marks)
You can find the solutions of this Unit Test here: Unit Test (Solution): Crop Production and Management
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FAQs on Unit Test: Crop Production and Management - Science Class 8
| 1. What are the main practices involved in crop production and management? |  |
Ans. The main practices involved in crop production and management include soil preparation, selection of appropriate crops, planting techniques, irrigation management, pest and weed control, and harvesting methods. Proper management of these practices ensures healthy crop growth and maximizes yield.
| 2. How does soil type affect crop production? | |
Ans. Soil type significantly affects crop production as it influences water retention, nutrient availability, and root development. Different crops thrive in specific soil types; for example, sandy soils drain quickly and are suitable for crops that require less moisture, while loamy soils retain nutrients and moisture, making them ideal for a variety of crops.
| 3. What are the benefits of crop rotation in management practices? | |
Ans. Crop rotation offers several benefits including improved soil health, reduced pest and disease buildup, enhanced nutrient cycling, and increased biodiversity. By alternating different crops in the same area, farmers can maintain soil fertility and reduce reliance on chemical fertilizers and pesticides.
| 4. What role does irrigation play in crop production? | |
Ans. Irrigation plays a crucial role in crop production by providing adequate water supply, especially in areas with insufficient rainfall. It helps maintain soil moisture, supports plant growth during dry periods, and can lead to higher yields. Different irrigation methods, such as drip or sprinkler systems, can be used depending on the crop and local conditions.
| 5. What are the common pests and diseases that affect crops, and how can they be managed? | |
Ans. Common pests include aphids, caterpillars, and beetles, while diseases can range from fungal infections to bacterial blights. They can be managed through integrated pest management (IPM) practices, which involve monitoring pest populations, using biological control agents, implementing cultural practices, and applying chemical treatments when necessary, ensuring minimal impact on the environment.
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