RBSE Solutions Class 11 Indian Geography Chapter 9 Soil of India

RBSE Class 11 Indian Geography Chapter 9 Text Book Questions

RBSE Class 11 Indian Geography Chapter 9 Multiple Choice Questions

 

Question 1. The local soil in India is:
(a) Mountain soil
(b) Sandy soil
(c) Transported soil
(d) Black soil
Answer: (a) Mountain soil
In simple words: The soil found naturally in a specific place, not moved from somewhere else, is called local soil. Mountain soil is an example of local soil in India.

🎯 Exam Tip: Remember that 'local soil' refers to soil formed and found in its original place, directly from the underlying rocks or parent material.

 

Question 3. Black soil in India is:
(a) Transported soil
(b) Marshy soil
(c) Lava-based soil
(d) Soil formed by weathering
Answer: (c) Lava-based soil
In simple words: Black soil is also known as Regur soil and forms from weathered lava rocks. This soil is very fertile and good for growing cotton.

🎯 Exam Tip: Associate black soil with its formation from volcanic (lava) rocks and its suitability for cotton cultivation.

RBSE Class 11 Indian Geography Chapter 9 Very Short Answer Type Questions

 

Question 1. What is the colour of late-rite soil?
Answer: The color of laterite soil is red. It looks very similar to a brick. This red color comes from iron oxides in the soil.
In simple words: Laterite soil is red, just like a brick.

🎯 Exam Tip: When describing soil characteristics, always mention its color, texture, and origin if possible, as these are key identifiers.

 

Question 2. Where is older alluvial soil found in India?
Answer: Older alluvial soil is found in high-lying flood-affected regions where flood water cannot reach. This type of soil is generally less fertile than newer alluvial soils.
In simple words: Older alluvial soil is found in areas that flood waters do not reach.

🎯 Exam Tip: Distinguish between 'older alluvial' (Bhangar) and 'newer alluvial' (Khadar) soils by their location relative to floodplains and their fertility.

RBSE Class 11 Indian Geography Chapter 9 Short Answer Type Questions

 

Question 1. What is meant by soil conservation?
Answer: Soil conservation means trying to keep soil fertile or make it more fertile. It involves preventing soil from being lost due to erosion, or from losing its richness because of too much use, acidity, salt, or other chemicals. Practices like slash-and-burn farming, which are not good for the soil, lead to degradation in some areas. Keeping the soil healthy is vital for farming.
In simple words: Soil conservation is all about protecting soil from being lost or becoming less fertile. It aims to keep the soil healthy for farming.

🎯 Exam Tip: When defining soil conservation, ensure to include both preventing soil loss (erosion) and maintaining/improving fertility, along with examples of causes of degradation.

 

Question 2. Which type of soil gets renewed in natural form?
Answer: Alluvial soil gets renewed naturally. Every year, when rivers flood, they bring fresh silt and clay, which form new layers on the alluvial plains. This natural process helps keep the soil fertile and renewed.
In simple words: Alluvial soil renews itself each year because rivers deposit new layers of silt during floods.

🎯 Exam Tip: Remember that alluvial soils are constantly replenished by river floods, making them highly fertile and naturally renewed.

 

Question 3. What is meant by soil erosion?
Answer: Soil erosion is when the top layer of soil slowly wears away. This top layer is the most important part because it has many organic and nutrient-rich materials that plants need. Things like soil getting too packed, not enough organic matter, bad soil structure, poor water drainage, too much salt, and soil becoming acidic are the main causes. Also, farming methods like 'slash and burn' in less developed areas contribute to soil erosion.
In simple words: Soil erosion is the wearing away of the fertile top layer of soil by natural forces like wind and water, or by human activities like farming.

🎯 Exam Tip: When defining soil erosion, highlight the loss of the 'top soil' and its rich nutrient content, as well as mentioning key causes like compaction and poor drainage.

RBSE Class 11 Indian Geography Chapter 9 Essay Type Questions

 

Question 1. Describe the process of soil-formation. Also explain its types.
Answer: Soil is a thin layer on the Earth's surface, made from rocks that have broken down over time. It is mainly formed of tiny mineral pieces, dead plants and animals (organic materials), air, and water, all working together slowly. The type of soil depends on how it is made and what it contains. Factors like climate, parent rock, topography, vegetation, and time greatly influence this process.
Indian soils are grouped into the following types based on their structure and content:
1. Alluvial soil
2. Black or Lava soil
3. Red soil
4. Laterite soil
5. Mountain soil
**1. Alluvial soil:** This soil is found in the Great Northern plains of India. It is a very fine, fertile soil deposited by rivers flowing over floodplains and riverbeds. In India, it covers about 8 lakh sq. km. It's also called alluvial deposit, alluvial sediment, or alluvium, and it can be clayey, silty, or gravelly. Rivers carry this soil and drop it when their flow slows down. This makes it one of the most productive soils for agriculture.
**2. Black or Lava soil:** This soil is found in the lava regions of South India, covering about 5 lakh sq. km. It is also known as Regur soil and is well-known for its ability to hold moisture, making it ideal for cotton cultivation.
In simple words: Soil forms slowly from broken rocks, organic matter, air, and water. Different types of soil are found in India, like alluvial soil from rivers and black soil from lava.

🎯 Exam Tip: For descriptive answers on soil, remember to explain both the formation process and the characteristics of each major soil type, including their distribution and key features.

 

Question 1. Describe the process of soil-formation. Also explain its types. (continued from page 3)
Answer:
**3. Red Soil:** This soil is porous, meaning it has tiny holes. It cannot hold much moisture and needs irrigation often. It is not very fertile and has a brownish or reddish color due to iron particles. This soil also contains small pebbles and stones and lacks calcium. Its formation is linked to the weathering of ancient crystalline and metamorphic rocks.
**4. Laterite Soil:** This soil has a color like a clay brick and contains many pebbles. It forms from the breaking down of old rocks. It has a lot of iron and aluminum but lacks calcium, phosphorus, nitrogen, sulfur, and humus. When it dries, it becomes as hard as a stone. This soil is good for growing tea. Laterite soil is typically found in areas with high temperatures and heavy rainfall, which leads to intense leaching.
**5. Sandy soil:** This is a natural, grainy soil made of very small rock and mineral particles. It has a lot of alkaline substances but not much nitrogen or humus. Because it is dry and porous, it is easily carried by wind. It can be fertile in areas where irrigation is available. This soil is common in desert and semi-arid regions.
**6. Mountain Soil:** This is an immature soil, meaning it has not fully developed. It is a mixture of small pebbles and stones. Its top layer is thin and acidic. It forms from smaller and larger rock particles. In areas with mountain soil, terrace farming is common, where potatoes and tea are grown. In less fertile areas, it is used for pastures.
In simple words: Red soil is porous and needs regular watering. Laterite soil is red like brick, hard when dry, and good for tea. Sandy soil is grainy and dry, found in desert areas. Mountain soil is young, stony, and used for terrace farming.

🎯 Exam Tip: When listing different soil types, remember to include a key characteristic for each, such as its color, texture, fertility, and common crops or geographic location.

Map Based Questions

 

Question 1. On the map of India, show the areas of red soil and sandy soil.
Answer: The map showing the distribution of various soil types, including red soil and sandy soil, is provided below. Red soil is typically found across the Deccan plateau, while sandy soil is prominent in western Rajasthan and parts of Gujarat.

In simple words: The map below points out where red soil and sandy soil are found in India. Red soil is common in central and southern India, and sandy soil is mainly in the western desert areas.

🎯 Exam Tip: For map-based questions, accurately mark the requested regions and ensure your legend is clear and correctly identifies each area.

 

Question 2. Show the areas of Black soil and Mountain soil on the map of India.
Answer: The map below indicates the regions where black soil and mountain soil are found in India. Black soil covers large parts of the Deccan Plateau, particularly in Maharashtra and Gujarat, while mountain soil is spread across the Himalayan range.

In simple words: The map shows where black soil is found, mostly in central India, and where mountain soil is located in the northern parts.

🎯 Exam Tip: When marking geographical features, use distinct patterns or colors for each type and clearly label them in the legend.

RBSE Class 11 Indian Geography Chapter 9 Other Important Questions

RBSE Class 11 Indian Geography Chapter 9 Multiple Choice Questions

 

Question 2. The soil that is formed by the fragmentation of lava is:
(a) Sandy soil
(b) Alluvial soil
(c) Black soil
(d) Mountain soil
Answer: (c) Black soil
In simple words: Black soil is created when lava rocks break down into smaller pieces. This soil is good for cotton.

🎯 Exam Tip: Connect lava fragmentation directly to the formation of black soil, which is known for its dark color and fertility.

 

Question 3. The soil that is found in the flood affected areas of the rivers is:
(a) Older alluvial
(b) Newer alluvial
(c) Newest alluvial
(d) Late-rite soil
Answer: (c) Newest alluvial
In simple words: In areas affected by river floods, the soil found there is the newest alluvial soil. This soil is very fertile as new sediments are deposited regularly.

🎯 Exam Tip: Understand that continuous deposition by floods leads to 'newest' or 'newer alluvial' soils, which are typically very fertile due to fresh sediment.

 

Question 4. The cotton soil is:
(a) Red soil
(b) Black soil
(c) Mountain soil
(d) Alluvial soil
Answer: (b) Black soil
In simple words: Black soil is also called cotton soil because it is the most suitable type of soil for growing cotton crops.

🎯 Exam Tip: Always remember that black soil (or Regur soil) is synonymous with cotton cultivation due to its moisture-retaining properties.

 

Question 6. The sandy soil is:
(a) Red soil
(b) Black soil
(c) Sandy soil
(d) Salty soil
Answer: (c) Sandy soil
In simple words: Sandy soil is a type of soil mainly found in dry areas and deserts. It has large particles and does not hold much water.

🎯 Exam Tip: Identify sandy soil by its coarse texture, low moisture retention, and common occurrence in arid regions.

 

Question 7. The immature soil is:
(a) Older alluvial
(b) Black soil
(c) Late-rite soil
(d) Mountain soil
Answer: (d) Mountain soil
In simple words: Mountain soil is considered immature because it has not fully developed and contains many stones and pebbles.

🎯 Exam Tip: Remember that immature soils, like mountain soil, typically have poorly developed profiles and contain larger rock fragments.

 

Question 8. Where does the most of wind erosion take place?
(a) In plateau areas
(b) In desert areas
(c) In the plains
(d) In mountainous regions
Answer: (b) In desert areas
In simple words: Wind erosion mostly happens in desert areas because the soil is dry, loose, and there are strong winds with little plant cover.

🎯 Exam Tip: Associate wind erosion with arid and semi-arid regions where sparse vegetation and dry, loose soil allow wind to easily carry away particles.

 

Question 9. The cause of the formation of 'behads' is:
(a) Sheet erosion
(b) Contour erosion
(c) Gully erosion
(d) None of the options
Answer: (c) Gully erosion
In simple words: 'Behads' are deep ravines formed by gully erosion, where running water carves out channels in the land.

🎯 Exam Tip: Understand that 'behads' are specific landforms created by gully erosion, which involves concentrated water flow carving deep channels.

 

Question 11. The State which is going to be benefited the most from the Indira Gandhi Canal Project is:
(a) Uttar Pradesh
(b) Haryana
(c) Rajasthan
(d) Madhya Pradesh
Answer: (c) Rajasthan
In simple words: The Indira Gandhi Canal Project is built to provide water mainly to Rajasthan, helping agriculture in its dry areas.

🎯 Exam Tip: Know the major irrigation projects in India and the states they primarily benefit, as these are common geography questions.

Matching Type Questions

 

Question A. Match Column A with Column B:

Answer:
1. (b) Older alluvial (i) matches with Bangar (b).
2. (d) Newer alluvial (ii) matches with Khadar (d).
3. (e) Newest alluvial (iii) matches with Deltaic (e).
4. (c) Regur (iv) matches with Black (c).
5. (a) Immature soil (v) matches with Mountainous (a).
In simple words: This table matches different types of soil (like older alluvial or newer alluvial) with their common names or characteristics. For example, older alluvial soil is also called Bangar, and newer alluvial soil is Khadar.

🎯 Exam Tip: For matching questions, it's crucial to know the alternative names or defining features of each term to correctly pair them.

 

Question B. Match Column A with Column B:

Answer:
1. (d) Desert of Thar (i) matches with Wind based (d).
2. (a) Plains region (ii) matches with River based (a).
3. (b) Coastal areas (iii) matches with Oceanic current based (b).
4. (c) Upper Himalayan region (iv) matches with Glacier based (c).
In simple words: This table links different regions of India with the main type of soil erosion that happens there. For example, deserts experience wind erosion, while rivers cause erosion in plains.

🎯 Exam Tip: Relate each geographical region to its predominant erosion agent (wind for deserts, rivers for plains, ocean currents for coasts, glaciers for Himalayas).

RBSE Class 11 Indian Geography Chapter 9 Very Short Answer Type Questions

 

Question 1. What is soil?
Answer: Soil is the very top layer of the Earth where plants grow. It is usually a black or dark-brown material made up of a mix of old plant and animal remains (organic matter), clay, and tiny rock particles. It is a vital part of the ecosystem.
In simple words: Soil is the loose top layer of Earth where plants grow, made of tiny rocks, clay, and decayed plants and animals.

🎯 Exam Tip: Define soil by its location (top layer), composition (organic matter, minerals), and function (plant growth).

 

Question 2. What are the controlling factors of soil?
Answer: The main things that control how soil forms are climate, the shape of the land (relief), organic materials (like dead plants), the original rocks it came from (fundamental rocks), and how much time has passed. These factors work together to create different types of soil. The type of parent rock, for instance, determines the initial mineral composition.
In simple words: Climate, land shape, organic matter, original rocks, and time are the main factors that control how soil is formed.

🎯 Exam Tip: List the five main soil-forming factors (climate, organisms, relief, parent material, time) to get full marks on this question.

 

Question 4. What is meant by local soil?
Or
What is local soil?
Answer: Local soil is formed when broken-down rocks stay in the same place or move only a short distance, due to natural seasonal changes. This means the soil develops right where its parent rock is found. It is also called residual soil.
In simple words: Local soil is soil that forms and stays in the same area where its parent rocks broke down.

🎯 Exam Tip: Emphasize that local soil forms in situ (in its original place) from the underlying rock, distinguishing it from transported soil.

 

Question 5. What is meant by transported soil?
Answer: Transported soils are formed from materials that have weathered (broken down) in one place but then moved by natural forces, such as wind or water, to a new location, far from where they originally formed. Alluvial soil is a prime example of transported soil.
In simple words: Transported soil is made of weathered materials that have been carried by natural forces to a different place from their origin.

🎯 Exam Tip: Define transported soil by its key characteristic: being moved from its place of origin by agents like wind, water, or glaciers.

 

Question 6. How does the transportation of soil take place?
Answer: Soil transportation happens through various natural movements. It is carried away by river flows, the movement of large masses of ice (glaciers), strong winds, and currents in the ocean. These forces constantly reshape the Earth's surface by moving soil particles.
In simple words: Soil is moved by river water, glaciers, wind, and ocean currents from one place to another.

🎯 Exam Tip: List the main natural agents of erosion and deposition (rivers, glaciers, wind, oceanic currents) when explaining soil transportation.

 

Question 7. Why is alluvial soil so important in India?
Answer: Alluvial soil is very important in India because it is extremely fertile. This soil is excellent for growing many types of grains, leading to rich harvests. Because it is so fertile and productive, areas with alluvial soil are very densely populated. It plays a key role in India's agricultural economy.
In simple words: Alluvial soil is important in India because it is very fertile, grows many crops, and supports a large population.

🎯 Exam Tip: Highlight the high fertility of alluvial soil, its contribution to agriculture (especially grain production), and its role in supporting dense populations in India.

 

Question 8. Where is alluvial soil find in India?
Answer: Alluvial soil is primarily found in the vast Great North Indian Plains. It is also found along the southwestern coastal plains of India. These areas are constantly enriched by river systems that deposit fresh sediments.
In simple words: Alluvial soil is mostly found in the Great North Indian Plains and the southwestern coastal areas.

🎯 Exam Tip: Identify the major river plains (e.g., Indo-Gangetic plains) and coastal plains as the primary locations for alluvial soil in India.

 

Question 9. How much area do alluvial soils cover in India?
Answer: Alluvial soils cover a large area of approximately eight lakh square kilometers in India. This vast coverage highlights its importance for agriculture and population distribution across the country. Eight lakh square kilometers is a significant portion of India's land area.
In simple words: Alluvial soils cover about 8 lakh square kilometers in India.

🎯 Exam Tip: Remember the approximate area (8 lakh sq. km) to quantify the extensive spread and importance of alluvial soils in India.

 

Question 11. What is meant by Bangar region?
Answer: The Bangar region refers to slightly raised, terraced land that contains older alluvial soil. Because it is higher up, this land is never affected by floods. This characteristic makes it distinct from newer alluvial soils found in floodplains.
In simple words: Bangar is higher land made of older alluvial soil that does not get flooded by rivers.

🎯 Exam Tip: Distinguish Bangar from Khadar by its elevation, older alluvial composition, and resistance to flooding.

 

Question 12. What is Khadar Region?
Answer: The Khadar regions are low-lying floodplains that are made up of fresh alluvial soil. This makes them more fertile compared to Bangar regions because new sediments are deposited every year by floods. This constant replenishment makes them highly productive for agriculture.
In simple words: Khadar is low land near rivers with new, fertile alluvial soil that gets flooded yearly.

🎯 Exam Tip: Remember that Khadar soils are newer, lower, and more fertile due to annual replenishment by river floods.

 

Question 13. Mention the newest alluvial soil areas.
Answer: The delta formed by the Ganges and Brahmaputra rivers is an example of an area with the newest alluvial soil. These river deltas are constantly receiving fresh sediments, making them extremely fertile and ideal for agriculture.
In simple words: The Ganges-Brahmaputra delta has the newest alluvial soil because rivers constantly deposit fresh earth there.

🎯 Exam Tip: Identify major river deltas, especially the Ganges-Brahmaputra delta, as prime examples of areas with very new and fertile alluvial soil.

 

Question 14. Why is sufficient humus found in the alluvial soil?
Answer: Alluvial soils have a good amount of humus because they are formed from materials deposited by rivers. These river deposits contain many decomposed living organisms and plant matter. This organic content enriches the soil with humus, making it highly fertile.
In simple words: Alluvial soil has a lot of humus because rivers bring many decayed plants and animals along with the soil.

🎯 Exam Tip: Relate the high humus content in alluvial soils to the deposition of organic matter by rivers, which enhances its fertility.

 

Question 15. How does the natural renewal of alluvial soil take place?
Answer: In areas with alluvial soils, rivers that flood carry new silt and clay. These materials get deposited, forming fresh layers of soil. This natural process allows alluvial soils to renew themselves every year, keeping them fertile. This is a continuous cycle of deposition and enrichment.
In simple words: Alluvial soil naturally renews itself each year when flooded rivers deposit new layers of silt and clay.

🎯 Exam Tip: Explain the natural renewal of alluvial soil by focusing on the annual deposition of fresh silt and clay by flooding rivers.

 

Question 16. Describe the formation of black soil.
Answer: Black soil, also known as Regur soil, is primarily formed from the weathering and fragmentation of lava rocks. This process takes place over long periods in areas that were once covered by volcanic eruptions, such as the Deccan Trap region of India. The breakdown of these basaltic rocks, rich in minerals like montmorillonite, gives the soil its characteristic black color and high clay content. This clay content gives it good moisture retention properties.
In simple words: Black soil is formed from the breakdown of lava rocks over time, especially in volcanic regions, giving it its dark color and ability to hold water.

🎯 Exam Tip: When explaining black soil formation, always link it to volcanic (lava) rocks and the process of weathering, mentioning its high clay content.

 

Question 18. Black soils have water-containing capacity for a long period. Why?
Answer: Black soils can hold water for a long time mainly because they contain enough of a mineral called Montmorillonite. This mineral gives the soil a high clay content and a swelling-shrinking property. This allows the soil to absorb and retain a lot of moisture, which is beneficial for crops like cotton, especially during dry periods.
In simple words: Black soils hold water for a long time because they have a mineral called Montmorillonite, which helps them soak up and keep moisture.

🎯 Exam Tip: Key to black soil's water retention is the presence of Montmorillonite, which gives it a high clay content and expansion properties.

 

Question 19. Black soil is also called cotton soil. Why?
Answer: Black soil is often called cotton soil because cotton has been the most common traditional crop grown in these areas for a long time. The soil's ability to retain moisture makes it very suitable for cotton cultivation, especially in regions with moderate rainfall. This association has led to its common name.
In simple words: Black soil is called cotton soil because it is the best soil for growing cotton, and cotton has been a main crop there for many years.

🎯 Exam Tip: Emphasize the historical and traditional association of black soil with successful cotton cultivation as the reason for its alternative name.

 

Question 20. Where are the red soils found in India?
Answer: Red soils are found in several parts of India, including Chhattisgarh, the Chhota Nagpur region, Orissa, Andhra Pradesh, Tamil Nadu, and Karnataka. These soils are typically found in areas with crystalline igneous and metamorphic rocks and relatively low rainfall.
In simple words: Red soils are found in states like Chhattisgarh, Orissa, Andhra Pradesh, Tamil Nadu, and Karnataka.

🎯 Exam Tip: Remember the main states in central and southern India where red soils are predominantly found, often in regions with older crystalline rocks.

 

Question 21. How are the late-rite soils formed?
Answer: Laterite soils are formed through a process of intense and prolonged weathering of the underlying parent rocks. This process, called leaching, occurs in tropical areas with high temperatures and heavy rainfall. The heavy rain washes away silica and other soluble minerals, leaving behind iron and aluminum oxides, which give laterite its distinctive red color.
In simple words: Laterite soils form from rocks that break down deeply due to heavy rain and high heat, washing away some minerals and leaving iron and aluminum.

🎯 Exam Tip: Link laterite soil formation to intense leaching in hot and humid climates, which concentrates iron and aluminum oxides.

 

Question 22. Where are late-rite soils found in India?
Answer: In India, laterite soils are found in a narrow belt. This belt stretches from the edge of the Eastern Ghats, extends to the Rajmahal Hills, and continues further into Assam, passing through West Bengal. These regions typically experience high rainfall and high temperatures.
In simple words: Laterite soils are found in a narrow strip from the Eastern Ghats to the Rajmahal Hills and into Assam, through West Bengal.

🎯 Exam Tip: Identify the geographical distribution of laterite soils as a narrow belt along specific hill ranges and humid regions in India.

 

Question 24. Where are the sandy soil found in India?
Answer: In India, sandy soils are mainly found in dry climate areas. These include regions like Western Rajasthan, Saurashtra, and the Desert of Kutch. These areas have low rainfall and high temperatures, which favor the formation of sandy soils.
In simple words: Sandy soils are found in India's dry areas, such as Western Rajasthan, Saurashtra, and the Kutch Desert.

🎯 Exam Tip: Link the presence of sandy soils to arid and semi-arid regions with specific examples like the Thar Desert and Kutch.

 

Question 25. Why are the mountain soils immature?
Answer: Mountain soil is considered immature because it hasn't had enough time to fully develop a proper soil profile. Also, it contains large rock particles, which makes it hard for plant matter to mix in well. Because of its underdeveloped nature, mountain soil is often referred to as immature soil. Factors like steep slopes and cold climates also hinder its development.
In simple words: Mountain soils are immature because they haven't fully developed over time and contain large rock pieces that prevent organic matter from mixing easily.

🎯 Exam Tip: Key reasons for mountain soil immaturity include insufficient time for development, coarse texture, and limited organic matter integration.

 

Question 26. What is meant by soil erosion?
Answer: Soil erosion is when the top layer of soil is moved or displaced from its original location. It is a form of soil degradation, meaning the soil loses its quality and ability to support plant life. This can happen due to natural forces like wind and water.
In simple words: Soil erosion means the top layer of soil is carried away, making the soil less useful for growing plants.

🎯 Exam Tip: Define soil erosion as the 'displacement of the upper layer' and emphasize its consequence as a 'form of soil degradation'.

 

Question 27. In which areas of India is the problem of soil erosion mainly seen?
Answer: The problem of soil erosion is mostly seen in several Indian states. These include Rajasthan, Haryana, Uttarakhand, Uttar Pradesh, Chhattisgarh, Jharkhand, and Bihar. These regions are often affected by factors like strong winds, heavy rainfall, or river action, leading to significant soil loss.
In simple words: Soil erosion is mostly seen in Rajasthan, Haryana, Uttarakhand, Uttar Pradesh, Chhattisgarh, Jharkhand, and Bihar.

🎯 Exam Tip: List key states in northern and central India that are prone to soil erosion, indicating a broad geographical understanding.

 

Question 28. What are the problems related to soil found in India?
Answer: The problems linked to soil in India are various. They include soil erosion, which means the loss of valuable topsoil; a decrease in soil fertility, making it less productive for crops; and soil pollution, which contaminates the soil with harmful substances. These issues collectively impact agricultural productivity and environmental health.
In simple words: India faces problems with soil erosion, low soil fertility, and soil pollution.

🎯 Exam Tip: When discussing soil problems, categorize them into erosion, fertility loss, and pollution for a comprehensive answer.

 

Question 29. What is meant by decrease in soil fertility?
Answer: A decrease in soil fertility means that the soil's power to grow crops becomes weaker. When the soil can no longer produce a good harvest, it is said to have reduced fertility. This can happen due to nutrient depletion, poor land management, or chemical imbalances. This impacts food production greatly.
In simple words: A decrease in soil fertility means the soil loses its ability to grow good crops.

🎯 Exam Tip: Define decreased soil fertility as the reduction in the soil's capacity to yield rich crops, implying nutrient depletion or degradation.

RBSE Class 11 Indian Geography Chapter 9 Short Answer Type Questions (SA-I)

 

Question 1. Distinguish between local and transported soils.
Answer: The main differences between local and transported soils are explained in the table below. Understanding how soils are formed and moved helps us know their properties better.

In simple words: Local soils stay where they are made and have bigger particles, but they are not very fertile. Transported soils are moved by nature, have smaller particles, and are more fertile.

🎯 Exam Tip: When distinguishing between two concepts, always use clear, concise points, preferably in a tabular format if allowed, to show direct comparisons.

 

Question 2. What is the contribution of soils in growing crops?
Answer: India is a country that relies heavily on farming, and soil is very important for growing good crops. The soil is the natural source of food (nutrients) that plants need to grow. The type and quality of soil influence the farming methods, the kind of fertilizers to use, the seeds planted, and even the pesticides needed. Different types of soil can support different kinds of plant life, making biodiversity possible. Therefore, soils play a vital role in India's economy and food production.
In simple words: Soil is crucial for farming in India because it gives plants nutrients and decides what crops can grow. Good soil means better harvests and supports the country's economy.

🎯 Exam Tip: When discussing the importance of soil, remember to link it directly to agriculture, economy, and the specific factors like nutrients, crop types, and farming practices.

 

Question 4. Distinguish between Bangar areas (older alluvial) and Khadar areas (new alluvial).
Answer: The main differences between Bangar (older alluvial) and Khadar (new alluvial) areas are shown in the table below. These distinctions are important for understanding agricultural productivity and land use in river plains.

In simple words: Bangar soils are older, higher, and don't flood, needing more water for farming. Khadar soils are newer, lower, flood yearly, and are naturally more fertile due to fresh silt.

🎯 Exam Tip: When comparing Bangar and Khadar, focus on their age, elevation, flooding patterns, and fertility, as these are the key distinguishing factors for riverine plains.

 

Question 5. Mention the characteristics of black soil.
Answer: The main characteristics of black soil are:
1. Black soil can hold moisture for a long time, which is helpful for crops in dry periods.
2. When this soil dries out, it forms deep cracks and becomes very hard.
3. Black soil has low levels of phosphorus.
In simple words: Black soil holds water well, cracks when dry, and is low in phosphorus.

🎯 Exam Tip: Remember to highlight the moisture retention capacity and the cracking nature as primary characteristics of black soil, which are key for its agricultural uses.

 

Question 6. Write the characteristics of red soils.
Answer: The characteristics of red soils are:
1. Red soils have many small pores, which means water can pass through easily.
2. They are not good at holding moisture for long.
3. These soils require frequent watering or irrigation.
4. They are not naturally very fertile, but their richness can be improved by adding fertilizers like manure.
5. Their red color comes from iron oxides in an oxidized state.
6. They are low in important nutrients like nitrogen, phosphorus, and organic matter.
7. These soils typically have thin layers. The type of rock they form from greatly influences their nutrient content.
In simple words: Red soils are porous, don't hold water well, need frequent irrigation, and are not very fertile without manure. They are red due to iron and lack many nutrients.

🎯 Exam Tip: When describing red soils, remember to mention their porous nature, poor moisture retention, reddish color (due to iron oxides), and low natural fertility.

 

Question 7. Write the characteristics of late - rite soil.
Answer: The main characteristics of laterite soil are:
1. It has a red color, similar to a solid brick.
2. This soil contains a large number of small stones or pebbles.
3. It is formed by strong washing away of minerals (leaching) due to heavy tropical rains.
4. Laterite soils are rich in iron and aluminum minerals.
5. They are found in regions with high temperatures and a lot of rainfall.
6. These soils are acidic, feel rough, and crumble easily.
7. Heavy rainfall washes away important elements like silica, salts, and the smallest soil particles.
8. Tea plantations are commonly grown in areas where this soil is found. The intense leaching process in laterite soils leaves behind less soluble iron and aluminum oxides, which contribute to its distinctive color and composition.
In simple words: Laterite soil is red like a brick, has many pebbles, forms in hot and rainy places because heavy rain washes away nutrients, and is good for tea farming.

🎯 Exam Tip: When describing laterite soils, emphasize the role of heavy rainfall and high temperatures in its formation, the leaching process, and its acidic nature, which makes it suitable for specific crops.

 

Question 8. Describe the causes of decline in soil fertility in India and its remedial measures.
Answer: The decline of soil fertility in India is a serious issue, meaning that the soil's ability to produce good crops is constantly decreasing. This can lead to lower food production and affect farmers' livelihoods. Causes often include overuse of chemical fertilizers, continuous cropping, and lack of organic matter.
Remedial Measures:
1. Farmers should use natural fertilizers such as compost or green manure to make the soil more fertile.
2. Practicing crop rotation, where different crops are grown in sequence on the same land, helps maintain soil nutrients.
3. Leaving agricultural land uncultivated for 3 to 4 years allows the soil to naturally regain its fertility. These measures help restore the balance of nutrients in the soil and prevent further degradation.
In simple words: Soil in India is losing its ability to grow good crops because of reasons like continuous farming. To fix this, farmers should use natural fertilizers, rotate their crops, and let the land rest for a few years.

🎯 Exam Tip: When discussing soil fertility decline, ensure you cover both the causes (often human-induced) and practical, sustainable remedial measures like organic farming techniques and crop rotation.

RBSE Class 11 Indian Geography Chapter 9 Short Answer Type Questions (SA-II)

 

Question 1. Write the characteristics of Alluvial soil. Or Give the main features of Alluvial soil.
Answer: The main characteristics of alluvial soil, found mostly in the Indian plains, are as follows:
1. This soil is typically found in flat plains, which makes it easy to build canals, dig wells, and cultivate crops.
2. Alluvial soils are able to hold moisture for a long time.
3. It has small, loose particles, making it easy for crops to grow and for plants to absorb nutrients.
4. This is a transported soil, meaning it's carried by rivers, and it is very fertile.
5. There is a high amount of humus (decomposed organic matter) in these soils, as rivers mix various decaying substances into them.
6. These soils receive a fresh layer of silt every year, which helps them renew naturally.
7. Generally, these types of soils do not require additional fertilizers.
8. Regions with alluvial soils are often called the "food bowl" and "population belt" of India due to their high agricultural productivity. The annual deposition of fresh silt by rivers rejuvenates these soils, contributing to their enduring fertility over centuries.
In simple words: Alluvial soil is found in plains, holds water well, has fine particles, is very fertile due to humus and yearly silt, doesn't need much fertilizer, and is great for growing food, making it India's food bowl.

🎯 Exam Tip: When describing alluvial soil, focus on its location (plains), formation (transported by rivers), high fertility (due to humus and annual renewal), and its economic significance (food bowl of India).

 

Question 2. Distinguish between sandy and mountain soils.
Answer: The differences between sandy and mountain soils can be understood based on the following points. These distinct characteristics influence the vegetation and land use in their respective regions.

In simple words: Sandy soil is moved by wind, is dry, alkaline, mature, and can be fertile with irrigation. Mountain soil is moved by water, is hard with stones, acidic, immature, and mostly infertile.

🎯 Exam Tip: For comparative questions, always clearly list the basis of comparison for each point to ensure a structured and comprehensive answer.

 

Question 3. Explain the problem of soil erosion in India. Or “Soil erosion is a major problem of Indian soils.” Explain how?
Answer: Soil erosion is a very big problem in India, where the valuable top layer of soil is washed or blown away. Conditions such as low organic matter, damaged soil structure, poor drainage, high salt levels, and acidic soil can make this erosion happen faster. This issue makes fertile land unusable for farming. About one-fourth of India's land is affected by this serious problem. Understanding the specific types of erosion and affected regions helps in planning targeted conservation strategies.
Areas of soil erosion:
The main regions in India facing significant soil erosion are Rajasthan, Uttarakhand, Haryana, Uttar Pradesh, Madhya Pradesh, Chhattisgarh, Jharkhand, and Bihar. This problem often occurs because rivers like the Yamuna, Chambal, Damodar, and Mahanadi overflow, especially in their valleys. Soil erosion is seen in two forms: sheet erosion and gully erosion. Gully erosion has led to the formation of deep ravines, locally called 'behads', particularly in the areas along the Yamuna and Chambal rivers.
In simple words: Soil erosion is a big problem in India where fertile topsoil is lost due to factors like poor soil quality and heavy rains. It affects a large part of India, especially river valleys, and creates deep channels called 'behads'.

🎯 Exam Tip: When explaining soil erosion, define it first, then discuss the conditions that worsen it, mention the extent of the problem in India, and name key affected regions and specific forms like gully erosion.

 

Question 4. What are the causes of soil erosion in India? Or
Answer: The main causes of soil erosion in India are:
1. Heavy monsoon rainfall in India is a major reason for soil erosion.
2. In areas with excessive rainfall, severe floods occur, which loosen the soil, making it easier to wash away.
3. During summer, when fields are left empty, strong winds can carry away the fertile topsoil.
4. Continuous farming practices by people can change the soil's composition, encouraging erosion.
5. Poor surface water drainage, removal of forest plant litter, and overgrazing by animals also increase soil erosion.
6. Cutting down forests (deforestation) is a significant factor. Forest cover helps bind the top layer of soil, and its removal leads to more erosion.
7. The natural chemical properties and types of Indian soils can also speed up erosion.
8. Traditional farming methods in India are also among the factors responsible for soil erosion. Recognizing these various human and natural factors is crucial for developing effective soil conservation strategies.
In simple words: Heavy rain, floods, strong winds on empty fields, constant farming, poor drainage, cutting down trees, soil type, and old farming methods all cause soil erosion in India.

🎯 Exam Tip: Categorize the causes of soil erosion into natural factors (rainfall, floods, wind, soil type) and human factors (agriculture, deforestation, overgrazing) for a comprehensive answer.

 

Question 5. Describe the types of soil erosion.
Answer: There are two main types of soil erosion:
1. Sheet erosion: In dry and semi-dry regions with less rainfall, strong winds are a powerful cause of soil erosion. Fast-moving winds carry away the fertile, loose topsoil from agricultural land, leaving behind a lower area without its rich upper layer. This type of erosion is often subtle and can go unnoticed until significant damage occurs.
2. Gully erosion: This type occurs when surface water flowing down drainage channels removes the topsoil. It forms open, deep, and unstable channels that are generally more than 30 cm deep. The 'behads' or ravines found in the areas around the Yamuna and Chambal rivers are a direct result of gully erosion. While sheet erosion can be subtle and hard to notice initially, gully erosion is highly visible and severely damages land, making it unusable for agriculture.
In simple words: Soil erosion happens in two main ways: sheet erosion, where wind blows away the thin topsoil from large areas, and gully erosion, where running water carves deep channels into the land.

🎯 Exam Tip: Clearly define and differentiate between sheet and gully erosion, providing examples for gully erosion (like 'behads') to illustrate your understanding.

 

Question 6. Describe the steps taken for soil conversation.
Answer: For soil conservation, the following steps can be mainly taken:
1. Planting more trees can stop soil erosion because plant roots, grass, and shrubs hold the soil tightly. So, more trees, grass, and shrubs should be planted in green belts.
2. Dams can be built and large water reservoirs can be created to control water and stop soil erosion.
3. On mountain slopes, terrace farming should be practiced to reduce runoff and soil loss.
4. The raised edges (ridges) of the land should be made stronger to prevent soil from washing away.
5. Allowing animals to graze too much in one area (overgrazing) should be stopped to protect the soil.
6. Contour farming, where crops are planted along the natural curves of the land, should be used on slopes.
7. Blockades or small dams should be built in drainage paths to control water overflow.
8. Uncontrolled cutting of forests should be prevented.
9. Wetlands should be restored, and agricultural land should be left with minimal disturbance to its layers. These varied methods highlight a holistic approach to soil conservation, combining afforestation, water management, and sustainable agricultural practices.
In simple words: To save soil, we should plant more trees, build dams, practice terrace and contour farming, stop overgrazing and cutting trees, strengthen land ridges, control water flow, and restore wetlands.

🎯 Exam Tip: When listing soil conservation steps, try to include a mix of afforestation, water management, and agricultural techniques to show a comprehensive understanding.

 

Question 7. Describe the efforts made by the Indian Government for soil conservation.
Answer: In India, both the central and state governments are making various efforts for soil conservation. Some major efforts include:
1. The Central Arid Zone Research Institute was established in Jodhpur to help control the problem of desertification.
2. Trees that can grow in dry and semi-dry conditions are being planted with water from the Indira Gandhi Canal.
3. The Central Land Protection Board was set up to turn wasteland into usable farmland and to protect soil fertility.
4. Many research centers have been created by the central Government to focus on soil conservation.
5. To improve grazing lands for soil conservation, seeds are spread by aeroplanes and helicopters.
6. Research centers related to soil conservation have been established in several cities.
7. People are being made aware of the importance of soil conservation.
8. Rock phosphate and gypsum are being mixed into the soil to reduce its acidity and alkalinity. These diverse initiatives show a multi-pronged approach, tackling both scientific research and community awareness for sustainable land management.
In simple words: The Indian government is working to save soil by setting up research centers, planting trees, improving wastelands, spreading awareness, and adding special minerals to soil.

🎯 Exam Tip: When describing government efforts, mention specific institutes or programs, and categorize actions such as research, afforestation, land reclamation, and public awareness campaigns.

 

Question 8. Describe the importance of soils with reference to India.
Answer: The importance of soils in India is significant for several reasons:
1. Soils determine the type of agriculture practiced in different regions.
2. They provide the fundamental base for growing various kinds of crops.
3. Alluvial soils, in particular, are extremely useful for cultivating crops such as rice, wheat, and sugarcane, supporting a large part of India's food production.
4. Indian soils also indicate the presence and distribution of different types of minerals. For instance, the coastal soil of Kerala contains a good quantity of monazite mineral.
5. Soils form the essential foundation for the growth of diverse types of vegetation. The diverse range of soils across India directly supports its rich agricultural biodiversity and contributes significantly to the national economy.
In simple words: Soils in India are very important because they decide what crops can grow, provide ground for all plants, and show where different minerals are found, making them key to India's farming and economy.

🎯 Exam Tip: When writing about the importance of soils, connect it to agriculture, economic value, biodiversity, and the presence of minerals, using specific examples like alluvial soil or monazite.

RBSE Class 11 Indian Geography Chapter 9 Essay Type Questions

 

Question 1. Explain the Indian soils in detail. Or Classify the Indian soils on the basis of physical structure and colour. Or Indian soils show variations on regional basis, how? Explain. Or Indian soils are controlled by their forming factors. Explain.
Answer: Indian soils are very diverse due to the country's vast geographical area and significant differences in land features, climate, vegetation, and the long process of rock erosion. All these conditions have greatly shaped the types of soils found in India, leading to variations in their color, composition, and structure. The diverse geological history and climatic conditions of India have sculpted a unique tapestry of soil types. Indian soils can be divided into the following categories:
1. Alluvial soil
2. Black soil
3. Desert soil
4. Mountainous soil
5. Gray - brown soil
6. Late-rite soil
7. Red and Yellow soil
8. Red soil
9. Glacial and Skeletal soil
10. Sub-mountainous soil

Let's describe each type in detail:
1. Alluvial soil: This soil is mainly found in the Great Northern plains of India. It is a fine, fertile soil that rivers carry and deposit on flood plains and river beds. It covers an area of about 8 lakh sq. km in India. Other names for it include alluvial deposit, alluvial sediment, or alluvium. It can be clayey, silty, or gravelly and is laid down when river currents slow down.
2. Black or Lava soil: This soil is found in the lava regions of South India, covering about 5 lakh sq. km. It is predominantly located in the central part of India, including southeastern Rajasthan, most of Madhya Pradesh, southeastern Gujarat, Maharashtra, northern Karnataka, and parts of Telangana and Andhra Pradesh. This soil is known for its ability to retain moisture.
3. Desert soil: These soils are mostly found in the desert regions of Rajasthan. This soil is dry and porous. It is also found in the Rann of Kutch and Saurashtra. Desert soils are typically sandy with low organic content.
4. Mountainous soil: This soil is found in the Himalayan regions. It is considered immature and contains many pebbles and stones. It has a thin layer and is low in calcium and humus. Its characteristics vary with altitude.
5. Gray - Brown soil: These soils are mainly found in the northern and central parts of Gujarat and in the foothills of the Aravalli mountain range in Rajasthan. They often have a high salt content.
6. Laterite soil: This is a red soil, hard like a brick, and often contains many pebbles. It forms in areas with high temperatures and heavy rainfall through the breakdown of old rocks. It is mainly seen in the Western Ghats and as a narrow belt from the Rajmahal hills along the Eastern Ghats, extending through West Bengal up to Assam. This soil is typically acidic.
7. Red and Yellow soil: This soil is found scattered across India in regions like Banswara, Pratapgarh, Chittorgarh, Bhilwara districts of Rajasthan, and parts of Madhya Pradesh, Orissa, and Chhattisgarh. The yellow color often indicates a hydrated form of iron oxide.
8. Red soil: This is a porous soil found in Chhattisgarh, the Chhota Nagpur plateau, Orissa, Eastern Andhra Pradesh, Tamil Nadu, Karnataka, and Central and Southeastern Telangana. It is generally less fertile than alluvial or black soils.
9. Glacial and Skeletal soil: These soils are found in the high hilly regions of Jammu and Kashmir and Sikkim. They are typically thin and rocky, formed by glacial action.
10. Sub-mountainous soil: This soil type is generally found in the lower slopes of mountainous regions, where finer sediments accumulate.
In simple words: Indian soils are diverse because of India's varied land, climate, and rock types. They are classified into types like alluvial, black, desert, and mountain soils, each with its own features and locations.

🎯 Exam Tip: For a comprehensive answer on Indian soils, start with the general factors influencing their formation, then list and describe each major type, noting their key characteristics and geographical distribution.

 

Question 2. Describe the different types of soil-erosion in India. Or Different types of soil-erosion in India are seen. How? Explain. Or Soil erosion is a result of several processes and reactions. Describe its different forms.
Answer: India experiences various types of soil erosion, which are caused by different natural processes and human activities. Each type has distinct characteristics and affects different regions of the country.
The different forms of soil erosion in India are:
1. Wind Erosion: This is a significant problem in the dry and semi-dry areas of North-west India. Strong winds carry away loose topsoil, severely affecting about 45 million hectares of land in regions like Western Rajasthan, Punjab, Haryana, Gujarat, and western Uttar Pradesh.
2. Water Erosion: This type of erosion is more common in wet areas that receive heavy rainfall. It is mainly observed in Punjab, Uttar Pradesh, West Bengal, Assam, and the eastern and western coastal plains of India, where flowing water washes away soil.
3. Gravity Erosion: This is a process where rocks and sediments slide down slopes due to the force of gravity. It can happen slowly or quickly and is found in the eastern states of India, such as Nagaland, Manipur, Mizoram, Tripura, and parts of Arunachal Pradesh and Meghalaya.
4. Saline and Acidic Erosion: This type of soil erosion is mainly seen in Haryana, the coastal area of southern Gujarat, the Chambal river valley in Rajasthan, western Uttar Pradesh, and central Andhra Pradesh. It occurs when soils become overly salty or acidic, affecting their structure and plant growth.
5. Alkali Erosion: This takes place in barren lands where there is an excess of alkaline substances. It is found in the Rann of Kutch and along the banks of several Indian rivers.
6. Rill Erosion: This involves the removal of soil by water concentrated in small, finger-like channels or streamlets. It is common in most parts of the peninsular plateau of India, particularly in the central plains of Rajasthan, the southeastern peninsular part, most of Maharashtra, eastern Karnataka, Tamil Nadu, Telangana, and Madhya Pradesh. Each type of erosion presents unique challenges and requires specific conservation techniques to mitigate its impact.
In simple words: Soil erosion in India happens in several ways: wind blows soil away in dry areas, water washes it away in wet areas, gravity causes land to slide down slopes, and too much salt, acid, or alkali in the soil also causes it to erode. Small water channels can also cause rill erosion.

🎯 Exam Tip: When describing different types of soil erosion, define each type clearly, mention its primary cause (e.g., wind, water, gravity, chemical), and provide specific geographical regions where it is prevalent in India.

 

Question 3. Write the characteristics of Indian soils. Or Indian soils are different from the soils found in the rest of the world. How ? Explain. Or "India soils are beyond compare." Explain.
Answer: Indian soils possess several distinct characteristics that set them apart from soils found in many other parts of the world. These unique features are shaped by India's diverse geography, climate, and long history of human interaction with the land.
Here are the characteristics of Indian soils:
1. The soils in peninsular India are formed from the breakdown of underlying rocks. Various natural forces like wind, water, and gravity erode these parent rocks to create a layer known as Regolith.
2. Indian soils are quite unique globally based on their composition, the long time they took to form, and their overall development.
3. Most Indian soils are ancient, well-developed, and contain a good amount of humus (decomposed organic matter).
4. However, they generally have lower quantities of nitrogen, organic matter, and vegetation compared to some other soils worldwide.
5. Indian soils often have higher temperatures due to the country's climatic conditions.
6. The depth of soil on hills, plateaus, and slopes is usually less, while it is much deeper in the great northern plains.
7. Due to continuous and intensive farming, the quality and strength of Indian soils have diminished over time.
8. Without proper irrigation, Indian soils show deficiencies in supporting abundant and healthy crop growth.
9. With the availability of adequate manure and irrigation, Indian soils can become highly fertile and productive.
10. The fundamental formation process of Indian soils is lengthy and mature, indicating complex geological and biological histories. This unique combination of geological, climatic, and anthropogenic influences gives Indian soils their distinct identity, crucial for the nation's agricultural landscape.
In simple words: Indian soils are special because they come from old rocks, vary a lot, are generally old and rich in humus but low in nitrogen. They get hot, are thin on hills but deep in plains, and can be very fertile with good care, but they can also get tired from too much farming.

🎯 Exam Tip: When describing the characteristics of Indian soils, ensure you include aspects like their origin (peninsular vs. plains), age, nutrient content (humus, nitrogen), temperature, depth variation, and the impact of agricultural practices and irrigation.

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