Class 8 Science - PT-1 Important Questions and Answers
Chapter 1: Crop Production and Management
Q: What are the basic practices of crop production?
A: The basic practices are: preparation of soil, sowing, adding manure and fertilizers, irrigation,
protection from weeds, harvesting, and storage.
Q: Differentiate between kharif and rabi crops.
A: Kharif crops are sown in the rainy season (June to September) e.g., rice, maize. Rabi crops are
sown in the winter season (October to March) e.g., wheat, gram.
Q: Explain the process of sowing. What precautions should be taken during sowing?
A: Sowing is placing seeds in the soil. Precautions: Use healthy seeds, proper spacing, and
appropriate depth for good germination.
Q: Why is ploughing important? Mention any two tools used for ploughing.
A: Ploughing loosens the soil for better root penetration and air circulation. Tools: Plough and hoe.
Q: What is irrigation? List any two traditional and two modern methods.
A: Irrigation is watering of crops. Traditional: moat, chain pump. Modern: drip irrigation, sprinkler
system.
Q: Why is weeding necessary? Name two weedicides.
A: Weeding removes unwanted plants that compete for nutrients. Weedicides: 2,4-D and Metribuzin.
Q: What is crop rotation and how does it help in farming?
A: Crop rotation is growing different crops alternately on the same field. It helps maintain soil fertility
and reduces pests.
Q: How are grains stored on a large scale?
A: Grains are stored in silos and granaries using proper drying and fumigation techniques.
Q: How does the use of fertilizers differ from manure?
A: Fertilizers are chemical substances rich in specific nutrients, while manure is organic and
Chapter 1: Crop Production and Management
Q: What are the basic practices of crop production?
A: The basic practices are: preparation of soil, sowing, adding manure and fertilizers, irrigation,
protection from weeds, harvesting, and storage.
Q: Differentiate between kharif and rabi crops.
A: Kharif crops are sown in the rainy season (June to September) e.g., rice, maize. Rabi crops are
sown in the winter season (October to March) e.g., wheat, gram.
Q: Explain the process of sowing. What precautions should be taken during sowing?
A: Sowing is placing seeds in the soil. Precautions: Use healthy seeds, proper spacing, and
appropriate depth for good germination.
Q: Why is ploughing important? Mention any two tools used for ploughing.
A: Ploughing loosens the soil for better root penetration and air circulation. Tools: Plough and hoe.
Q: What is irrigation? List any two traditional and two modern methods.
A: Irrigation is watering of crops. Traditional: moat, chain pump. Modern: drip irrigation, sprinkler
system.
Q: Why is weeding necessary? Name two weedicides.
A: Weeding removes unwanted plants that compete for nutrients. Weedicides: 2,4-D and Metribuzin.
Q: What is crop rotation and how does it help in farming?
A: Crop rotation is growing different crops alternately on the same field. It helps maintain soil fertility
and reduces pests.
Q: How are grains stored on a large scale?
A: Grains are stored in silos and granaries using proper drying and fumigation techniques.
Q: How does the use of fertilizers differ from manure?
A: Fertilizers are chemical substances rich in specific nutrients, while manure is organic and
