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Class 8 Science: Crop Production and Management

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Class 8 Science: Crop Production and Management

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Questions and Answers

What is the main difference between Rabi and Kharif crops in India?

Rabi crops require less water than Kharif crops.

Rabi crops are genetically modified, while Kharif crops are not.

Rabi crops are grown during the winter season, while Kharif crops are grown during the monsoon season. (correct)

Kharif crops are sown during the winter season.

Which of the following is a correct step in soil preparation for crop production?

Spraying synthetic growth hormones on the soil

Adding excessive water to compact the soil

Using chemical pesticides to sterilize the soil

Turning and loosening the soil by ploughing (correct)

How do new crop varieties impact the use of chemical fertilizers?

New crop varieties require smaller amounts of chemical fertilizers

New crop varieties increase the need for organic manure only

New crop varieties eliminate the need for any fertilizers

New crop varieties lead to a significant rise in the use of chemical fertilizers (correct)

Which nutrient is commonly found in chemical fertilizers and is essential for plant growth?

Phosphorus Signup and view all the answers

What is the primary purpose of manure in agriculture?

To provide essential nutrients to the soil for plant growth Signup and view all the answers

Which of the following is a traditional irrigation method according to the text?

Chain Pump Signup and view all the answers

Why are food grains usually harvested with more moisture than required for storage?

To prevent insects and rodents from damaging the grains Signup and view all the answers

What is animal husbandry primarily concerned with?

Breeding animals for providing food Signup and view all the answers

Study Notes

Crop Production in India

Rabi crops are sown during the winter season, whereas Kharif crops are sown during the monsoon season.

Soil Preparation

Tillage is a correct step in soil preparation for crop production.

Crop Varieties and Fertilizers

New crop varieties can reduce the use of chemical fertilizers due to their improved nutrient uptake efficiency.

Nutrients in Fertilizers

Nitrogen is a common nutrient found in chemical fertilizers and is essential for plant growth.

Manure in Agriculture

The primary purpose of manure in agriculture is to act as a natural fertilizer, improving soil fertility and structure.

Irrigation Methods

Basin irrigation is a traditional irrigation method.

Grain Harvesting and Storage

Food grains are usually harvested with more moisture than required for storage to prevent moisture loss during transportation and storage.

Animal Husbandry

Animal husbandry is primarily concerned with the care and breeding of livestock.

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Description

Learn about the importance of crop production, proper management, and distribution of food in feeding a large population. Explore the types of crops grown in India based on seasons and how the selection of seeds affects yield.