Chapter 12: Improvement in Food Resources Case Study Questions | science Class 9 CBSE

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Chapter 12: Improvement in Food Resources Case Study Questions | science Class 9 CBSE | ByteNotes.in

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India's growing population puts increasing pressure on food production. While the land available for cultivation remains limited, the demand for food grains continues to rise. This makes it necessary to improve productivity through scientific methods without harming the environment.

Question 1: Q1. Why is it not possible to cultivate more land in India?

India is already intensively cultivated with limited land expansion scope.
Most arable land is already under use for agriculture.
Expanding land use could disturb environmental balance.

Question 2: Q2. What solutions are suggested to meet food demand?

Improve crop and livestock yield efficiency.
Use sustainable farming practices.
Adopt scientific crop management and animal husbandry.

Question 3: Q3. Why must environmental balance be maintained in farming?

Intensive resource use can degrade soil and water quality.
Pollution and deforestation may harm biodiversity.
Sustainable practices ensure long-term productivity.

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A farmer chooses to grow wheat and mustard together on the same field. This is an example of mixed cropping, a strategy that helps reduce the risk of crop failure and ensures some income.

Question 1: Q1. What is mixed cropping?

Growing two or more crops on the same land simultaneously.
It reduces dependence on a single crop.
Provides insurance against total crop failure.

Question 2: Q2. How does it help the farmer?

Even if one crop fails, the other might succeed.
Improves land use efficiency.
Enhances income stability.

Question 3: Q3. Give two suitable crop pairs for mixed cropping.

Wheat + Mustard.
Groundnut + Sunflower.
These combinations use resources efficiently.

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Scientists develop a new variety of rice that matures faster and is resistant to drought. This variety provides better yield in less time, making it suitable for multiple cropping seasons.

Question 1: Q1. What is crop variety improvement?

Enhancing traits like yield, resistance, and maturity in crops.
Achieved through hybridisation or genetic modification.
Leads to better productivity under various conditions.

Question 2: Q2. How does shorter maturity duration benefit farmers?

Allows multiple cropping in a year.
Reduces farming cost and time.
Helps avoid losses due to weather uncertainties.

Question 3: Q3. What are biotic and abiotic resistances in crops?

Biotic: resistance to diseases, pests, and insects.
Abiotic: resistance to drought, salinity, and heat.
Such resistance improves survival and yield.

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A village introduces a watershed management system with small check dams to trap rainwater. This raises the groundwater table and provides better irrigation for agriculture throughout the year.

Question 1: Q1. What is watershed management?

Planning and managing land and water resources.
Includes building check-dams to conserve water.
Helps recharge groundwater and reduce erosion.

Question 2: Q2. How does it help agriculture?

Ensures year-round water availability.
Supports irrigation during dry seasons.
Improves crop yield and reduces crop failure.

Question 3: Q3. Name two traditional irrigation methods.

Wells – dug and tube wells for groundwater.
Tanks – storage systems for rainwater.
Canals – distribute river water across fields.

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In a farming workshop, students learn that manure improves soil texture, while fertilizers offer immediate nutrients. However, excessive use of fertilizers can damage soil quality in the long term.

Question 1: Q1. How is manure beneficial to soil?

Adds organic matter and nutrients.
Improves soil structure and moisture retention.
Supports microbial activity in the soil.

Question 2: Q2. What are the drawbacks of chemical fertilizers?

Can degrade soil fertility with continuous use.
Harm beneficial soil organisms.
Cause water pollution if overused or misapplied.

Question 3: Q3. What is the difference in nutrient supply between the two?

Manure releases nutrients slowly over time.
Fertilizers supply nutrients quickly in large amounts.
Balanced use of both is ideal for sustainable farming.

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Chapter sections

Chapter 12: Improvement in Food Resources | Case Study Questions

Passage

Question 1: Q1. Why is it not possible to cultivate more land in India?

Question 2: Q2. What solutions are suggested to meet food demand?

Question 3: Q3. Why must environmental balance be maintained in farming?

Passage

Question 1: Q1. What is mixed cropping?

Question 2: Q2. How does it help the farmer?

Question 3: Q3. Give two suitable crop pairs for mixed cropping.

Passage

Question 1: Q1. What is crop variety improvement?

Question 2: Q2. How does shorter maturity duration benefit farmers?

Question 3: Q3. What are biotic and abiotic resistances in crops?

Passage

Question 1: Q1. What is watershed management?

Question 2: Q2. How does it help agriculture?

Question 3: Q3. Name two traditional irrigation methods.

Passage

Question 1: Q1. How is manure beneficial to soil?

Question 2: Q2. What are the drawbacks of chemical fertilizers?

Question 3: Q3. What is the difference in nutrient supply between the two?

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