Chapter 1: Resources and Development Case Study Questions | geography Class 10 CBSE

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Chapter 1: Resources and Development Case Study Questions | geography Class 10 CBSE | ByteNotes.in

Case Study

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Case Set 1

Case Analysis

Passage

Ramesh is a farmer living in Punjab. Over the past decade, he has noticed that his agricultural land has become increasingly waterlogged. He uses tube wells extensively for irrigation to maximize wheat production. The water table in his village has changed significantly, and white patches have started appearing on his fields. His neighbour, an agronomist, explained that over-irrigation leads to waterlogging which causes salinity and alkalinity in the soil, making it progressively less productive. Ramesh attended a government workshop on sustainable farming and learned about judicious use of water resources, crop rotation, and the need to balance short-term gains with long-term land health. He now wonders whether he should switch to less water-intensive crops to protect his land for future generations.

Question 1: What is the primary cause of land degradation described in the passage?

Over-irrigation leading to waterlogging
Waterlogging causes increase in salinity and alkalinity in the soil

Question 2: How does waterlogging lead to soil degradation? Explain briefly.

Waterlogging raises the water table, causing salts to accumulate on the soil surface
This increases salinity and alkalinity, making the soil infertile and unfit for normal cultivation

Question 3: Ramesh's situation reflects a broader issue of resource use without conservation. Suggest any three measures to prevent land degradation in states like Punjab.

Adopting judicious irrigation practices to avoid over-irrigation and waterlogging
Practising crop rotation and intercropping to maintain soil fertility
Shifting to less water-intensive crops to reduce pressure on land and water resources
Using soil testing to determine exact water and nutrient requirements

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Case Set 2

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During a school field trip to the Chambal basin in Madhya Pradesh, students observed deeply cut channels and gullies across large stretches of land. Their teacher explained that running water cuts through clayey soils to form gullies, making the land unfit for cultivation — this is locally called ravines. The students also learned that in other areas, water flows as a sheet over large slopes, washing away the topsoil in a process called sheet erosion. They saw terraced fields on nearby hillsides and discussed how traditional farming communities had developed sustainable land-use practices to combat erosion. The teacher emphasized that both natural forces and human activities such as deforestation and overgrazing accelerate soil erosion.

Question 1: What are 'ravines' and where are they commonly found in India?

Ravines are bad lands formed when running water cuts through clayey soils making deep gullies
They are commonly found in the Chambal basin region of Madhya Pradesh

Question 2: Distinguish between gully erosion and sheet erosion as described in the passage.

Gully erosion occurs when running water cuts deep channels through clayey soil, making the land unfit for cultivation
Sheet erosion occurs when water flows as a sheet over large areas and washes away the topsoil uniformly from a slope

Question 3: The students observed terraced fields as a conservation method. Describe any three methods of soil conservation that can be practised in hilly and plain areas.

Terrace cultivation: steps are cut on slopes to restrict the flow of water and reduce erosion on hillsides
Contour ploughing: ploughing along the contour lines decelerates the flow of water down slopes, preventing erosion
Strip cropping: large fields are divided into strips with grass left between crops to break the force of wind
Shelter belts: rows of trees planted to protect soil from wind erosion and stabilise sand dunes

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Case Set 3

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Priya is studying the diverse soil types of India for her school project. She found that the northern plains are covered with alluvial soils deposited by three major Himalayan river systems — the Indus, the Ganga, and the Brahmaputra. She learned that alluvial soils can be classified as old alluvial (Bangar) and new alluvial (Khadar). Khadar soils are more fertile because they are renewed frequently by river flooding. The alluvial soils are rich in potash, phosphoric acid, and lime, making them ideal for crops like wheat, paddy, and sugarcane. Priya also noted that these regions of alluvial soil are among the most intensively cultivated and densely populated areas of India.

Question 1: Name the two types of alluvial soil and mention one distinguishing feature of each.

Bangar: old alluvial soil with higher concentration of kanker nodules, less fertile
Khadar: new alluvial soil with more fine particles, more fertile and frequently renewed by floods

Question 2: Why are regions of alluvial soils intensively cultivated and densely populated?

Alluvial soils are very fertile and contain adequate proportions of potash, phosphoric acid, and lime ideal for crop growth
They support multiple crops like sugarcane, paddy, wheat, and pulses, sustaining large populations

Question 3: Describe the distribution of alluvial soils in India and explain why they are considered the most important soil type.

Alluvial soils cover the entire northern plains deposited by the Indus, Ganga, and Brahmaputra river systems
They also extend through a narrow corridor in Rajasthan and Gujarat and are found in eastern coastal plains in deltas of Mahanadi, Godavari, Krishna, and Kaveri rivers
They are the most widely spread soils and are highly fertile, containing potash, phosphoric acid, and lime essential for agriculture
They support cultivation of major food and cash crops making them vital for India's food security

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Case Set 4

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A documentary on Indian agriculture highlighted the black cotton soil regions of Maharashtra and the Deccan Plateau. Farmers in Vidarbha grow cotton on these soils, locally called regur soils, without adding much irrigation because black soils can hold moisture for long periods. The documentary showed deep cracks forming in fields during the hot dry season, which the farmers said actually helps aerate the soil. However, the soil becomes sticky when wet and is difficult to work with. Black soils are rich in calcium carbonate, magnesium, potash, and lime but are generally poor in phosphoric content. The Deccan trap region, made up of lava flows, is the natural origin of these soils.

Question 1: Why is black soil ideal for growing cotton?

Black soil has a high capacity to hold moisture, ensuring water availability for cotton during dry periods
It is rich in soil nutrients like calcium carbonate, magnesium, potash, and lime which support cotton growth

Question 2: How do the deep cracks that form in black soil during summer benefit the crops?

Deep cracks develop during hot weather which helps in the proper aeration of the soil
This aeration improves root penetration and allows gas exchange necessary for healthy plant growth

Question 3: Describe the formation, characteristics, and distribution of black soil in India.

Black soil is formed from lava flows of the Deccan trap region; climatic conditions and parent rock material are important factors in its formation
It is clayey in texture, has high moisture retention capacity, is rich in calcium carbonate, magnesium, potash and lime, but poor in phosphoric content
Develops deep cracks in summer aiding aeration; sticky when wet making it hard to till
It covers the plateaus of Maharashtra, Saurashtra, Malwa, Madhya Pradesh, and Chhattisgarh and extends along the Godavari and Krishna valleys

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Case Set 5

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At the United Nations Conference on Environment and Development (UNCED) held in Rio de Janeiro, Brazil in June 1992, over 100 heads of state gathered to address global environmental challenges. The assembled leaders signed the Declaration on Global Climatic Change and Biological Diversity. The Rio Convention endorsed the Global Forest Principles and adopted Agenda 21 for achieving sustainable development in the 21st century. Agenda 21 was an international declaration aimed at combating environmental damage, poverty, and disease through global cooperation. It mandated that every local government should draw its own Local Agenda 21. The summit marked a turning point in how the world viewed the relationship between economic development and environmental protection.

Question 1: What is Agenda 21 and when was it adopted?

Agenda 21 is a declaration signed by world leaders in 1992 at UNCED in Rio de Janeiro, Brazil
It aims at achieving global sustainable development by combating environmental damage, poverty, and disease through global cooperation

Question 2: What were the major outcomes of the Earth Summit held at Rio de Janeiro in 1992?

Leaders signed the Declaration on Global Climatic Change and Biological Diversity
The Rio Convention endorsed the Global Forest Principles and adopted Agenda 21 for sustainable development in the 21st century

Question 3: Explain the concept of sustainable development and why it became necessary to adopt it globally after the 1992 Earth Summit.

Sustainable development means development that takes place without damaging the environment and does not compromise the needs of future generations
It became necessary because indiscriminate exploitation of resources led to global crises such as global warming, ozone depletion, environmental pollution, and land degradation
Resources were being depleted to satisfy the greed of few individuals and countries, creating inequalities and threatening planetary health
Agenda 21 provided a global framework for nations to cooperate in achieving development without environmental destruction

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Chapter sections

Chapter 1: Resources and Development | Case Study Questions

Passage

Question 1: What is the primary cause of land degradation described in the passage?

Question 2: How does waterlogging lead to soil degradation? Explain briefly.

Question 3: Ramesh's situation reflects a broader issue of resource use without conservation. Suggest any three measures to prevent land degradation in states like Punjab.

Passage

Question 1: What are 'ravines' and where are they commonly found in India?

Question 2: Distinguish between gully erosion and sheet erosion as described in the passage.

Question 3: The students observed terraced fields as a conservation method. Describe any three methods of soil conservation that can be practised in hilly and plain areas.

Passage

Question 1: Name the two types of alluvial soil and mention one distinguishing feature of each.

Question 2: Why are regions of alluvial soils intensively cultivated and densely populated?

Question 3: Describe the distribution of alluvial soils in India and explain why they are considered the most important soil type.

Passage

Question 1: Why is black soil ideal for growing cotton?

Question 2: How do the deep cracks that form in black soil during summer benefit the crops?

Question 3: Describe the formation, characteristics, and distribution of black soil in India.

Passage

Question 1: What is Agenda 21 and when was it adopted?

Question 2: What were the major outcomes of the Earth Summit held at Rio de Janeiro in 1992?

Question 3: Explain the concept of sustainable development and why it became necessary to adopt it globally after the 1992 Earth Summit.

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