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Improvement in Food Resources
Physics IX : Complete NCERT Exercise Solutions
Access comprehensive NCERT Solutions for Class 9 Science Chapter 15: Improvement in Food Resources. Learn about crop management, animal husbandry, poultry, fisheries, beekeeping, and sustainable agriculture practices with notes and solved Q&A.
Question 15.1
What do we get from cereals, pulses, fruits, and vegetables?
Answer & Explanation:
• Cereals provide carbohydrates
• Pulses provide proteins
• Fruits and vegetables provide vitamins, minerals, and fibre
Together, they supply essential nutrients required for a balanced diet.
• Pulses provide proteins
• Fruits and vegetables provide vitamins, minerals, and fibre
Together, they supply essential nutrients required for a balanced diet.
Question 15.2
How do biotic and abiotic factors affect crop production?
Answer & Explanation:
Biotic factors such as pests, weeds, and pathogens reduce crop yield.
Abiotic factors like temperature, rainfall, soil fertility, and water availability directly influence crop growth and productivity.
Abiotic factors like temperature, rainfall, soil fertility, and water availability directly influence crop growth and productivity.
Question 15.3
What are the desirable agronomic characteristics for crop improvements?
Answer & Explanation:
Desirable agronomic characteristics include:
• Tallness and profuse branching in fodder crops
• Dwarfness in cereals to prevent lodging
• Early maturity
• High yield and disease resistance
• Tallness and profuse branching in fodder crops
• Dwarfness in cereals to prevent lodging
• Early maturity
• High yield and disease resistance
Question 15.4
What are manure and fertilisers? Differentiate between them.
Answer & Explanation:
Manure is organic matter obtained from plant and animal waste that improves soil structure and fertility.
Fertilisers are chemical substances rich in nutrients like nitrogen, phosphorus, and potassium that increase crop yield quickly.
Fertilisers are chemical substances rich in nutrients like nitrogen, phosphorus, and potassium that increase crop yield quickly.
Question 15.5
What is irrigation? Why is it important?
Answer & Explanation:
Irrigation is the artificial supply of water to crops at regular intervals.
It is important because water is essential for seed germination, nutrient transport, photosynthesis, and maintaining soil moisture.
It is important because water is essential for seed germination, nutrient transport, photosynthesis, and maintaining soil moisture.
Question 15.6
What are weeds? How can they be controlled?
Answer & Explanation:
Weeds are unwanted plants that grow along with crops and compete for nutrients, water, and light.
They can be controlled by:
• Manual removal
• Use of weedicides
• Proper ploughing and cropping practices
They can be controlled by:
• Manual removal
• Use of weedicides
• Proper ploughing and cropping practices
Question 15.7
What are the causes of crop losses after harvesting?
Answer & Explanation:
Crop losses after harvesting are caused by:
• Improper storage conditions
• Attack by insects and rodents
• Growth of fungi and bacteria due to moisture
• Improper storage conditions
• Attack by insects and rodents
• Growth of fungi and bacteria due to moisture
Question 15.8
What are animal husbandry practices?
Answer & Explanation:
Animal husbandry refers to the scientific management of domestic animals such as cattle, poultry, and fish to obtain food, fibre, and other useful products.
Question 15.9
What is meant by poultry farming?
Answer & Explanation:
Poultry farming is the practice of rearing birds such as hens, ducks, and turkeys for obtaining eggs and meat.
Question 15.10
What is meant by sustainable agriculture?
Answer & Explanation:
Sustainable agriculture is the practice of producing food in a way that protects the environment, maintains soil fertility, and ensures long-term productivity without harming future generations.
📘 Exam Preparation Tip:
Focus on the different practices involved in crop production (manure, irrigation, cropping patterns). Learn the key aspects of animal husbandry - cattle farming, poultry, fish production. Understand the need for sustainable agriculture and organic farming.