Maharashtra Board Class 7 Geography Chapter 7 Soils Solutions

Question 1. Complete the following table.

Answer:

In simple words: This table explains how different factors like parent rock, regional climate, organic material, and microorganisms contribute to the formation and characteristics of soil. Each factor plays a distinct role in weathering, decomposition, and mixing processes that lead to soil development.

🎯 Exam Tip: Understanding the role of each factor in soil formation is crucial for answering descriptive questions on pedogenesis and related environmental science topics. Pay attention to how climate and biological activity interact with the parent material.

2. Why do the following occur?

Question 1. To the west of Sahyadris, laterite soils are formed from the basalt rock.
Answer:
- Laterite soils are formed in regions of heavy rainfall.
- The climate of western Sahyadris is hot - humid.
- This leads to leaching of basalt rocks due to which there is formation of laterite soils. In simple words: Laterite soils form in the hot, humid, and heavy rainfall areas west of Sahyadris because intense leaching washes away soluble minerals from the basalt rock, leaving behind iron and aluminum oxides that give laterite its characteristic properties.

🎯 Exam Tip: When explaining geographical phenomena, always link the characteristic (e.g., laterite soil) to its causal environmental factors (e.g., heavy rainfall, hot-humid climate, leaching). This shows a comprehensive understanding.

Question 2. Humus content in the soil increases.
Answer:
- Microorganisms and certain other organism help in decomposing the dead remains of organic materials.
- The biotic material thus produced is called humus.
- If organic manures, vermicompost compost are used regularly, the humus content in the soil increases. In simple words: Humus increases in soil when microorganisms decompose dead organic matter, forming a stable substance, and its content can be further boosted by regularly adding organic manures and compost.

🎯 Exam Tip: Focus on the role of decomposition and organic amendments. Mentioning both natural processes (microorganisms) and human interventions (manures) provides a complete answer for increasing humus content.

Question 3. Soil formation process is faster in the equatorial climate.
Answer:
- In the region of high rainfall and higher temperature the process of soil formation is faster.
- Equatorial climatic region have high temperature and receive high rainfall.
- Thus soil formation process is faster in the equatorial region. In simple words: Soil forms faster in equatorial climates because the combination of consistently high temperatures and abundant rainfall accelerates both chemical weathering of rocks and the decomposition of organic matter, speeding up the overall soil development process.

🎯 Exam Tip: Correlate climatic factors directly with the speed of soil formation. Emphasize how high temperature and rainfall provide optimal conditions for rapid chemical and biological processes essential for soil development.

Question 4. The salinity of the soil increases.
Answer:
- Due to excessive irrigation, the salts from the soil are drawn upwards.
- This increases the salinity of the soil. In simple words: Soil salinity increases primarily due to excessive irrigation, where water evaporates from the surface, leaving behind dissolved salts that accumulate in the topsoil.

🎯 Exam Tip: When discussing soil salinity, clearly explain the mechanism of salt accumulation, often linked to evaporation and capillary action drawing salts to the surface. Excessive irrigation is a key human-induced cause.

Question 5. Rice is the staple diet of the people from Konkan.
Answer:
- Hot - humid climate, heavy rainfall - fertile alluvial soil are favourable for rice cultivation.
- This soil has good water holding capacity. Since these conditions are found in the konkan region, rice is grown on a large scale here.
- So rice is the staple diet of the people from Konkan. In simple words: Rice is the staple diet in Konkan because the region's hot, humid climate, heavy rainfall, and fertile alluvial soils with good water-holding capacity create ideal conditions for extensive rice cultivation.

🎯 Exam Tip: For questions linking diet to geography, specify the climatic conditions (hot, humid, heavy rainfall) and soil characteristics (fertile alluvial, good water retention) that support the primary food crop of the region.

3. Give information on:

Question 1. Measures of soil conservation
Answer: The following are the measures of soil conservation:
(i) Afforestation / Planting trees: Planting trees can control the velocity of wind. This helps reducing erosion by wind. The plant roots hold the soil and also reduces the erosion of soil.
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र बड़े पैमाने पर पेड़ लगाने के अभियान को दर्शाता है, जिसे वनीकरण या वृक्षारोपण कहते हैं। इसमें हरे-भरे पेड़ों से ढका एक व्यापक क्षेत्र दिखाया गया है, जिसका उद्देश्य मिट्टी के कटाव को रोकना और हवा की गति को नियंत्रित करना है ताकि मिट्टी का संरक्षण हो सके।
(ii) Continuous contour trenches: Construction of continuous contour trenches at different height checks the velocity of water running along the slopes - hence reduces soil erosion. The water arrested in these trenches percolates into the ground.
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र ढलान वाले खेत में बनी सतत समोच्च खाइयों (CCT) को दर्शाता है। ये खाइयाँ ढलान के आर-पार बनाई जाती हैं ताकि पानी के बहाव की गति को धीमा किया जा सके और उसे मिट्टी में रिसने में मदद मिल सके, जिससे मिट्टी का कटाव रुकता है।
(iii) Implementation of watershed Development program: The Government of Maharashtra has implemented the watershed development programme under which constructing embankment along slopes in rural areas, introducing CCTs along steep slopes etc. are undertaken. This led to the success of the scheme 'Arrest water, let it percolate'. This has resulted in raising the ground water levels - reducing the erosion of soil.
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र खेत की मेड़बंदी (Contour Bunding) को दर्शाता है, जिसमें ढलानों पर मिट्टी की मेड़ें या बांध बनाए जाते हैं। ये मेड़ें पानी के बहाव को रोकने और उसे खेत में ही जमा होने देने में मदद करती हैं, जिससे मिट्टी का कटाव कम होता है और पानी धीरे-धीरे जमीन में रिसता है।
(iv) Implementation of Jalayukt Shivar: Under the scheme of Jalayukt Shivar, works like construction of farm bunds, arresting waters of small streams, connecting the streams etc. are being carried out on a large scale.
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक बांध या वीयर (Weir) को दर्शाता है, जो एक छोटी नदी या नाले के पार बनाया गया है। इसका उद्देश्य पानी के बहाव को नियंत्रित करना और उसे रोकना है, जिससे जल स्तर बढ़ता है और पानी को सिंचाई या भूजल पुनर्भरण के लिए उपयोग किया जा सके। In simple words: Soil conservation measures include afforestation, constructing continuous contour trenches, and implementing watershed development programs like Jalayukt Shivar, all aimed at preventing soil erosion, retaining moisture, and improving soil health.

🎯 Exam Tip: When asked about conservation measures, provide specific examples like afforestation and contour trenching. Explain how each method physically prevents erosion (e.g., roots holding soil, trenches slowing water flow) and its benefits (e.g., increased groundwater, reduced erosion).

Question 2. Organic Manures.
Answer:
(i) Organic manures in farming, helps to maintain the pH balance.
(ii) It also increases the proportion of humus, and retain the fertility of soil. In simple words: Organic manures are natural substances that enrich soil by maintaining pH balance and increasing humus content, thereby improving soil fertility and structure for better crop growth.

🎯 Exam Tip: Highlight the dual benefits of organic manures: pH balance and increased humus. These are key for soil health and fertility, making it a strong answer point.

Question 3. Place where you will get the information about the suitability of a soil for a particular crop.
Answer:
(i) The information about the suitability of a soil can be obtained from Department of Agriculture of Government of Maharashtra, Natural Resource conservation services, soil testing laboratories in various states and at many agricultural universities.
(ii) The type of soil, soil fertility, pH status of the soil, etc. are determined in soil testing.
(iii) Based on the testing, an analysis of the soil is done - information about the suitability of a soil for a particular crop is provided. In simple words: Information on soil suitability for specific crops can be obtained from agricultural departments, natural resource conservation services, soil testing laboratories, and agricultural universities, where soil composition, fertility, and pH are analyzed.

🎯 Exam Tip: For administrative or informational questions, list the relevant government bodies and research institutions. Emphasize that soil testing is the primary method for determining suitability and what aspects are tested.

Question 4. Importance of soils for plant growth.
Answer:
(i) Soil is important for plant as it hold roots that provide support for plants and stores nutrient for the growth of plants.
(ii) Fertile soils favour plant growth. In simple words: Soil is crucial for plant growth because it physically anchors roots, provides structural support, and acts as a reservoir for essential nutrients and water that plants need to thrive.

🎯 Exam Tip: Focus on the fundamental roles of soil: anchorage and nutrient/water provision. Briefly linking fertile soil to better growth strengthens the answer.

4. Complete the following table with reference to soil.

Answer:

In simple words: This table illustrates various actions taken in soil management, their immediate effects, and how these effects ultimately impact soil fertility, highlighting practices that protect or enhance fertility versus those that degrade it.

🎯 Exam Tip: For table-completion questions, ensure all cells are filled accurately. Understand the cause-and-effect relationships between agricultural practices and soil properties, particularly fertility, as these often appear in exams.

Think about it:

Question 1. Rohit and Prateeksha noted that their field had yielded a bumper crop. But they also noted that a part of their field had a stunted growth of plants. What investigation will you suggest to them?
Answer: I would suggest that they should check whether organic manures, are used evenly on all the parts of the field. Also, they should check whether that part of the field is getting adequate supply of water or not. In simple words: I would suggest checking for uneven distribution of organic manures and insufficient water supply in the stunted growth area, as these are common reasons for variations in crop yield within a single field.

🎯 Exam Tip: When troubleshooting agricultural issues, consider fundamental factors like nutrient distribution (manures) and water availability. These are primary determinants of plant health and growth.

Question 2. Why do equatorial regions have fertile soils?
Answer: The sun rays are perpendicular in equatorial regions so the climate is very hot and humid. This region also receives very heavy rainfall. As the process of soil formation is faster in these regions, equatorial regions have fertile soil. Also vegetal litter roots of plants, remains of animals, etc.; get decomposed adding to soil fertility. In simple words: Equatorial regions have fertile soils due to intense heat and heavy rainfall, which accelerate both the weathering of rocks and the rapid decomposition of abundant organic matter, quickly adding nutrients and speeding up soil formation.

🎯 Exam Tip: To explain soil fertility in equatorial regions, connect high temperatures and rainfall to rapid decomposition of biomass and accelerated weathering, which continuously replenish soil nutrients and organic content.

Question 3. Why is the vegetation sparse in deserts?
Answer: A desert is a barren area of land where a little precipitation occurs and consequently living conditions for plant and animal life are very hostile. It is an area where the soils are not fertile - hence vegetation is scanty. In simple words: Vegetation is sparse in deserts due to extremely low rainfall, harsh living conditions, and infertile soils that lack the necessary water and nutrients to support widespread plant life.

🎯 Exam Tip: When explaining sparse desert vegetation, focus on the lack of precipitation as the primary limiting factor, followed by the resulting infertile soil and hostile environment.

Question 1. What happened to the seeds put in the empty pot and pot filled with water?
Answer: Seeds in the empty pot and the pot filled with water did not germinate and did not show any sign of growth. In simple words: The seeds in the empty pot and the pot filled only with water did not germinate because they lacked the essential combination of soil for nutrients and proper moisture/aeration for growth.

🎯 Exam Tip: For experimental observations, state the direct result. The key takeaway here is that seeds need more than just water; they need a suitable medium like soil for germination and growth.

Question 2. What happened to the seeds put in the pot (c) filled with soil?
Answer: Seeds germinated and we could see some small twigs branching out. In simple words: The seeds planted in the soil-filled pot germinated and began to grow, showing initial signs of branching, indicating that soil provides the necessary environment for plant development.

🎯 Exam Tip: Clearly state the positive outcome when conditions are met. This answer directly contrasts with the previous one, highlighting the importance of soil.

Question 3. What do you learn from this?
Answer: We learn that plants need sunlight, water and soil to grow. In simple words: From this experiment, we learn that for plants to grow, they require a combination of sunlight, water, and soil, demonstrating the critical role each plays.

🎯 Exam Tip: Synthesize the learning into a concise statement of essential requirements for plant growth. This question tests the understanding of fundamental biological needs.

Fill in the blanks:

Question 1. _____ rock in a region is an important factor in soil. (Parent, Basalt, Granite)
Answer: Parent In simple words: The parent rock is the original rock material from which soil is formed, significantly influencing the soil's characteristics.

🎯 Exam Tip: Remember that the 'parent rock' determines many initial properties of the soil, such as its mineral composition and texture.

Question 2. The process of weathering depends on the _____ of the region. (climate, weather, soil)
Answer: climate In simple words: Weathering, the process that breaks down rocks, is directly influenced by the long-term weather patterns or climate of a region.

🎯 Exam Tip: Distinguish between 'weather' (short-term atmospheric conditions) and 'climate' (long-term patterns) when discussing geological processes like weathering.

Question 3. The _____ rock of the Deccan Plateau in Maharashtra turns into black soil after weathering. (granite, basalt, parent)
Answer: basalt In simple words: In the Deccan Plateau, black soil forms from the weathering of basalt rock, a common volcanic rock in that region.

🎯 Exam Tip: Associate specific rock types with the soil they form. Basalt is characteristic of the Deccan Plateau and produces black (Regur) soil.

Question 4. _____ soils along the river beds give higher yields. (Infertile, Fertile, Coarse)
Answer: Fertile In simple words: Soils found along river beds are typically fertile due to the deposition of nutrient-rich sediments, leading to good agricultural yields.

🎯 Exam Tip: Riverine soils are usually fertile due to alluvial deposits, which are rich in minerals and organic matter. This is a common geographical pattern.

Question 5. The _____ material comes from the decomposition of the remains of the plants and animals in that region. (biotic1, abiotic, pH)
Answer: biotic1 In simple words: Biotic material refers to the organic matter derived from decomposed plants and animals, which contributes to soil composition.

🎯 Exam Tip: Understand the difference between biotic (living or once-living) and abiotic (non-living) components in an ecosystem or soil. Decomposition of living remains creates biotic material in soil.

Question 6. _____ is a complete ecosystem. (Soil, Humus, weathered rocks)
Answer: Soil In simple words: Soil itself is considered a complete ecosystem because it harbors a diverse community of living organisms interacting with non-living components.

🎯 Exam Tip: Recognize that soil is not just dirt but a complex system including minerals, water, air, and living organisms, functioning as an ecosystem.

Question 7. Food crops like jowar and bajra are produced in the _____ soils of Maharashtra Plateau. (regur, coarse, laterite)
Answer: regur In simple words: Jowar and bajra, staple food crops, thrive particularly well in the regur (black) soils of the Maharashtra Plateau due to their fertility and water retention capacity.

🎯 Exam Tip: Connect specific crops to the soil types where they are typically cultivated. Regur soil is known for its suitability for millets like jowar and bajra.

Question 8. The local agriculture produce determines the _____ diet of the people. (staple, supplementary, secondary)
Answer: staple In simple words: The primary agricultural products of a region dictate the staple, or main, food items consumed by its inhabitants.

🎯 Exam Tip: The 'staple diet' refers to the main food consumed by a population, which is directly influenced by what can be grown locally.

Question 9. The proportion of humus is negligible in _____ soil. (coarse, black, laterite)
Answer: coarse In simple words: Coarse soils, often sandy or rocky, typically have a very low amount of humus because their large particle size prevents good water retention and decomposition.

🎯 Exam Tip: Coarse soils, due to their poor water and nutrient retention, are generally low in organic matter and thus humus. This is a key characteristic to remember.

Question 10. Planting trees can also control the _____ of the wind. (velocity, direction, temperature)
Answer: velocity In simple words: Planting trees helps reduce the speed or velocity of wind, thereby protecting soil from wind erosion and reducing desiccation.

🎯 Exam Tip: Trees act as windbreaks, significantly reducing wind velocity at ground level, which is a crucial aspect of soil conservation against wind erosion.

Question 11. Rocks like granite or gneiss in South India give rise to _____ soil. (black, red, regur)
Answer: red In simple words: The weathering of granite and gneiss, common in South India, results in the formation of red soils, characterized by their iron oxide content.

🎯 Exam Tip: Associate granite and gneiss rocks with the formation of red soils, which are prevalent in South India due to the chemical composition of these parent materials and the climatic conditions.

Question 12. In the humid climate of western Sahyadris the leaching of basalt rocks leads to formation of _____ soil. (black, lateritic, red)
Answer: lateritic In simple words: The humid climate of the western Sahyadris causes basalt rocks to undergo extensive leaching, leading to the formation of lateritic soils.

🎯 Exam Tip: Leaching in humid, high-rainfall areas is a defining process for laterite soil formation from basalt, removing soluble minerals and concentrating iron/aluminum oxides.

Question 13. The excessive spraying of chemicals and use of chemical fertilizers lead to _____. (soil degradation soil fertility, soil powder)
Answer: soil degradation In simple words: Overuse of chemical sprays and fertilizers harms the soil, leading to its degradation by depleting natural nutrients and altering its structure.

🎯 Exam Tip: Excessive use of artificial chemicals in agriculture often results in negative impacts like soil degradation, reduced microbial activity, and loss of long-term fertility.

Complete the following sentences:

Question 1. The biotic material comes from _____.
Answer: the decomposition of the remains of the plants and animals in that region In simple words: Biotic material in soil originates from the decomposition of dead plants and animals within a given area.

🎯 Exam Tip: Clearly define the source of biotic material in soil, emphasizing decomposition of organic remains as the process.

Question 2. Microorganisms and certain other organisms help decompose the dead remains of _____.
Answer: organic materials In simple words: Microorganisms play a vital role in breaking down dead organic materials, enriching the soil.

🎯 Exam Tip: Highlight the role of microorganisms in the breakdown of organic matter, a fundamental process in soil formation and nutrient cycling.

Question 3. Production of compost needs sufficient period of time and _____.
Answer: elements like organic waste, water, heat, etc. In simple words: Making compost requires time and specific elements such as organic waste, water, and appropriate heat for decomposition.

🎯 Exam Tip: When discussing compost production, remember the key ingredients (organic waste, water) and conditions (time, heat) for successful decomposition.

Question 4. In the region of high rainfall and higher temperatures, _____.
Answer: the process of soil formation is faster In simple words: Soil formation accelerates in areas with abundant rainfall and high temperatures due to enhanced weathering and decomposition.

🎯 Exam Tip: Correlate high rainfall and temperature directly with a faster rate of soil formation. This is a common geographical principle.

Question 5. In regions of low temperatures and low rainfall the _____.
Answer: soil formation takes more time In simple words: Soil formation is a slower process in regions experiencing low temperatures and limited rainfall, as these conditions inhibit weathering and organic decomposition.

🎯 Exam Tip: Contrast the impact of low temperatures and low rainfall on soil formation, explaining that these conditions lead to slower geological and biological processes.

Question 6. High use of chemical fertilizers, insecticides _____.
Answer: leads to the degradation of soils In simple words: Excessive application of chemical fertilizers and insecticides results in the degradation of soil health and quality.

🎯 Exam Tip: Be aware of the negative consequences of over-reliance on chemical inputs in agriculture, specifically soil degradation.

Question 7. In the areas where the soil is not fertile, _____.
Answer: vegetation is scanty In simple words: Infertile soil supports sparse or limited vegetation, as plants struggle to find necessary nutrients.

🎯 Exam Tip: Link soil fertility directly to the density and health of vegetation. Less fertile soil equals less vegetation.

Question 8. When man realized that sowing of seeds in the soil leads to the growth of plants and yields crops, _____.
Answer: he started using soil as a resource In simple words: Upon discovering that seeds grow into crops in soil, humans began to utilize soil as a valuable agricultural resource.

🎯 Exam Tip: This question highlights the historical shift in human interaction with soil, from a natural element to a cultivated resource for food production.

Question 9. Excessive irrigation draws the salts from the soil upwards and _____.
Answer: makes the soil saline and then unproductive In simple words: Excessive irrigation leads to salts rising to the soil surface, causing salinity and making the land barren for crops.

🎯 Exam Tip: Explain the full chain of events: excessive irrigation -> capillary action -> salt accumulation -> increased salinity -> unproductive soil. This demonstrates a complete understanding.

Question 10. Keeping the farmland fallow for some period and cultivating different crops alternatively is important _____.
Answer: to help retain the fertility of soils. In simple words: Leaving farmland fallow and practicing crop rotation are crucial techniques for restoring and maintaining soil fertility over time.

🎯 Exam Tip: Recognize fallowing and crop rotation as traditional and effective methods for natural soil fertility restoration and sustainability.

Give one word for the following:

Question 1. Soil formed due to weathering of basalt rock.
Answer: Black soil In simple words: Black soil is formed when basalt rock undergoes weathering.

🎯 Exam Tip: Directly associate basalt rock with black soil formation, especially in regions like the Deccan Plateau.

Question 2. Soil formed due to the leaching of the basalt rock.
Answer: Lateritic soil In simple words: When basalt rock is heavily leached, lateritic soil develops.

🎯 Exam Tip: Leaching is the key process differentiating lateritic soil from general black soil, even from the same parent rock like basalt.

Question 3. Biotic material mixed into the soils.
Answer: Humus In simple words: Humus is the decomposed biotic material integrated into the soil.

🎯 Exam Tip: Humus is the stable, dark organic matter resulting from decomposed biotic material, crucial for soil fertility.

Question 4. The excessive spraying of chemicals and use of chemical fertilizers.
Answer: Soil degradation In simple words: Overuse of agricultural chemicals causes soil degradation.

🎯 Exam Tip: Directly link excessive chemical use to soil degradation as a negative environmental outcome.

Question 5. The govt, scheme, work like construction of farm bunds, arresting waters of small streams, etc.
Answer: Jalayukt Shivar. In simple words: Jalayukt Shivar is a government initiative involving water conservation works like farm bunds and stream redirection.

🎯 Exam Tip: Recognize specific government programs related to water and soil conservation, such as 'Jalayukt Shivar' in Maharashtra, as relevant examples of policy implementation.

Who am I?

Question 1. I am a very important rock factor in soil formation.
Answer: Parent rock In simple words: I am the original rock that breaks down to form soil.

🎯 Exam Tip: The 'parent rock' is foundational to soil composition and characteristics; this is a key term in soil science.

Question 2. I form due to weathering of basalt rock. Jowar and Bajra mostly grow on this soil.
Answer: Regur soil / Black soil In simple words: I am the black soil derived from basalt, ideal for growing jowar and bajra.

🎯 Exam Tip: Connect basalt rock and specific crops (jowar, bajra) to Regur or Black soil, a typical association in parts of India.

Question 3. I am found in the hilltops of the western part of the Deccan plateau.
Answer: Coarse soil In simple words: I am the coarse soil found on hilltops in the western Deccan Plateau.

🎯 Exam Tip: Hilltops often have coarse, less developed soils due to erosion and limited accumulation of fine particles and organic matter.

Question 4. I am black in colour and have less organic components.
Answer: Regur or Black soil In simple words: I am the dark-colored Regur or Black soil, known for having relatively low organic content despite my appearance.

🎯 Exam Tip: While black in color, Regur soil (black soil) doesn't always imply high organic content; its color comes from titanium compounds, not necessarily humus.

Question 5. I am orange in colour and mostly found in the coastal belt of Konkan.
Answer: Laterite soil In simple words: I am the orange-colored laterite soil, commonly found in the Konkan coastal region.

🎯 Exam Tip: Laterite soils are typically reddish-orange due to high iron and aluminum oxides and are characteristic of humid tropical regions like Konkan.

Match The Columns:

Question 1.

Answer: 1 - c
2 - e
3 - d
4 - a
5 - b
In simple words: This table matches different types of soil with their characteristic formation processes or the regions where they are found. Understanding these connections helps classify and locate various soil types.

🎯 Exam Tip: Accurately matching soil types with their characteristics or locations is crucial for scoring. Focus on key identifiers for each soil type.

Answer The Following Questions In Short:

Question 1. What do you mean by 'Soil'?
Answer: (i) The uppermost layer of the earth's crust is called 'Soil'.
(ii) It contains the organic as well as mineral matter necessary for the growth of plants.
In simple words: Soil is the top layer of Earth's surface that supports plant life by providing essential organic and mineral nutrients.

🎯 Exam Tip: Define soil clearly, emphasizing its composition (organic and mineral matter) and its primary function (supporting plant growth).

Question 2. What are the factors necessary for the soil formation?
Answer: Soil is formed by:
- Weathering of the parent rock material.
- Climatic conditions of the region.
- The decomposition of plant remains.
- Animal manures and dead animals.
- Very long period of time.
In simple words: Soil forms over a long time from weathered rocks, influenced by climate, and enriched by decomposing plant and animal matter.

🎯 Exam Tip: List all the key factors influencing soil formation, including the parent material, climate, organic matter, and time, for a comprehensive answer.

Question 3. What is leaching ?
Answer: (i) Leaching is a process is which the salts & other soluble material are washed out of the rock through percolation of water.
(ii) This process is dominant in the areas of high rainfall & humid climate.
In simple words: Leaching is when water seeps through rocks, washing away soluble salts and materials, commonly occurring in rainy, humid areas.

🎯 Exam Tip: Explain both the mechanism (washing out of soluble materials by percolating water) and the conditions (high rainfall, humid climate) where leaching is prevalent.

Question 4. What is Humus?
Answer: (i) The decaying of organic material such as dead leaves, stems, root of the plant, vegetal litters, decomposed remains of animals get mixed into the soil.
(ii) This results in the formation of “Humus” thus retaining the fertility of soil.
(iii) If the proportion of humus in the soil is greater, the soil becomes fertile.
In simple words: Humus is the dark, organic material formed when dead plants and animals decompose and mix into the soil, greatly improving its fertility.

🎯 Exam Tip: Define humus by explaining its origin (decomposed organic matter) and its vital role in enhancing soil fertility.

Question 5. What leads to the degradation of soils?
Answer: (i) For getting higher production, different types of chemical fertilizers, insecticides are used profusely.
(ii) This leads to the degradation of soils.
In simple words: Excessive use of chemical fertilizers and insecticides for increased crop production degrades soil quality over time.

🎯 Exam Tip: Connect the overuse of synthetic chemicals in agriculture directly to the decline in soil quality and health.

Question 6. What led to record agricultural production?
Answer: Ans,
(i) To get richer harvests man made efforts to increase the fertility of soils.
(ii) In the process, use of different fertilizers became a practice which led to record agricultural production.
In simple words: Record agricultural production resulted from human efforts to boost soil fertility through various means, primarily the application of different fertilizers.

🎯 Exam Tip: Highlight human intervention and the use of fertilizers as key drivers behind increased agricultural output.

Question 7. What is soil erosion?
Answer: (i) When a layer of soil (top layer of soil) get removed due to wind or water it is called soil erosion.
(ii) Running water, climate and diversity in physiography are the reasons of soil erosion.
In simple words: Soil erosion is the removal of the top layer of soil by natural forces like wind and water, often influenced by climate and land features.

🎯 Exam Tip: Clearly define soil erosion as the removal of topsoil and mention the main agents (wind, water) and influencing factors (climate, physiography).

Question 8. What helps to maintain the pH balance of the soil?
Answer: (i) Organic manures, vermicompost, compost are used regularly.
(ii) It helps in maintaining the pH balance and retaining the fertility of the soil.
In simple words: Regular application of organic manures, vermicompost, and compost helps balance the soil's pH and keeps it fertile.

🎯 Exam Tip: Emphasize organic amendments (manures, vermicompost, compost) as effective methods for maintaining soil pH and fertility.

Why Do The Following Occur:

Question 1. Rice is the staple diet of the people from Konkan.
Answer: (i) Hot & humid climate, heavy rainfall & fertile alluvial soil are favourable for rice cultivation.
(ii) This soil has good water holding capacity. Since these conditions are found in the konkan region, rice is grown on a large scale here.
(iii) So rice is the staple diet of the people from Konkan.
In simple words: The Konkan region's hot, humid climate, heavy rainfall, and fertile alluvial soil with good water retention create ideal conditions for extensive rice cultivation, making it the staple food.

🎯 Exam Tip: Link the specific climatic and soil conditions of the Konkan region directly to its suitability for rice cultivation and, consequently, its dietary importance.

Question 2. Soil Erosion.
Answer: (i) A layer of soil gets removed due to wind or water.
(ii) Running water, climate and diversity in physiography are the reasons of soil erosion.
In simple words: Soil erosion happens when the topsoil is carried away by wind or water, influenced by regional climate and land features.

🎯 Exam Tip: Clearly state the agents (wind, water) and contributing factors (climate, physiography) that cause soil erosion.

Question 3. Soil degradation.
Answer: (i) To obtain a higher agricultural yield, chemical fertilizers, insecticides, weedicides, etc. are used.
(ii) The excessive spraying of chemicals and use of chemical fertilizers leads to soil degradation.
In simple words: Soil degradation occurs primarily due to the overuse of chemical fertilizers, insecticides, and weedicides aimed at increasing agricultural yields.

🎯 Exam Tip: Focus on the human-induced factors, specifically the excessive use of agrochemicals, as the main cause of soil degradation.

Give Geographical Reasons:

Question 1. Planting trees is necessary to conserve the soil.
Answer: (i) A layer of soil gets removed due to wind or water which leads to soil erosion.
(ii) Planting trees controls the velocity of the wind, thus reducing the erosion of soil by wind.
(iii) The roots of the plants hold the soil which also prevents soil erosion.
In simple words: Planting trees helps conserve soil by slowing wind velocity, thus reducing wind erosion, and by stabilizing the soil with their root systems, preventing both wind and water erosion.

🎯 Exam Tip: Highlight the dual role of trees-reducing wind speed and anchoring soil with roots-to explain their importance in soil conservation.

Question 2. Continuous contour trenches are constructed along the slopes.
Answer: (i) Construction of continuous contour trenches (CCTs) at different heights checks the velocity of water running along the slopes.
(ii) This reduces soil erosion.
In simple words: Continuous contour trenches are built on slopes to slow down water flow, which effectively reduces soil erosion by preventing rapid runoff.

🎯 Exam Tip: Explain how CCTs function by reducing water velocity on slopes, directly linking this action to the prevention of soil erosion.

Question 3. It is advisable to use organic manures, vermicompost and compost regularly.
Answer: (i) Use of organic manures, vermicompost, compost helps maintain the pH balance.
(ii) It also increases the proportion of humus thus retaining the fertility of soil.
(iii) Hence, it is advisable to use organic manures, vermicompost & compost regularly.
In simple words: Regular use of organic manures, vermicompost, and compost is recommended because they help balance soil pH and increase humus content, thereby boosting soil fertility.

🎯 Exam Tip: Emphasize the benefits of organic soil amendments-pH balance and increased humus-as reasons for their regular use in maintaining soil health.

Question 4. There emerged competition among the people to discover fertile lands and settle there.
Answer: (i) Man started producing greater amount of food crops for the growing population.
(ii) He realized that crop production and prosperity in agriculture depends on the fertility of soil and the optimum availability of water.
Hence, there emerged competition among the people to discover fertile lands & settle there.
In simple words: As human populations grew and food demands increased, people competed for fertile lands with sufficient water, realizing these were critical for successful agriculture and prosperity.

🎯 Exam Tip: Connect population growth and the need for food production to the realization of fertile land's importance, leading to competition for settlement.

Question 5. There was a rise of Indus civilization.
Answer: (i) When man realized that the fertile soils along the river beds give higher yields.
(ii) He settled in the valleys and started living there in groups.
(iii) This led to the rise of Indus civilization.
In simple words: The Indus civilization arose because people discovered that fertile soils near riverbeds yielded abundant crops, leading to settlements and the formation of groups in these rich valleys.

🎯 Exam Tip: Link the discovery of fertile riverine soils to increased agricultural yields, which encouraged human settlement and the eventual rise of major civilizations like the Indus.

Question 6. Countries like Saudi Arabia, Qatar, Oman, etc., fulfil their requirements by importing food from other countries.
Answer: (i) In countries like Saudi Arabia, Qatar, Oman etc. the soils are not arable so there is need to fulfil their food requirement.
(ii) Hence, countries like Saudi Arabia, Qatar, Oman import food from other countries.
In simple words: Countries such as Saudi Arabia, Qatar, and Oman import food because their soils are not suitable for farming, making local food production insufficient to meet demands.

🎯 Exam Tip: Explain that the lack of arable soil in these countries necessitates food imports to meet their domestic consumption needs.

Question 7. Lets find the names of the soils we have learnt and which regions they are found?
Answer:

In simple words: This table maps various soil types, such as Regur, Alluvial, Coarse, and Laterite, to their specific geographical locations within Maharashtra, showing where each is predominantly found.

🎯 Exam Tip: Memorize the specific regions associated with each soil type to accurately answer questions about their distribution.

Make Friends With Maps!

ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र महाराष्ट्र राज्य में विभिन्न मिट्टी के प्रकारों और उनके वितरण को दर्शाता है। इसमें काली मिट्टी (रेगुर), लेटराइट मिट्टी, जलोढ़ मिट्टी, पीली भूरी मिट्टी (पहाड़ी क्षेत्रों में) और मोटी मिट्टी सहित विभिन्न मिट्टी के प्रकारों के लिए एक अनुक्रमणिका भी शामिल है। यह मानचित्र महाराष्ट्र के विभिन्न जिलों में प्रत्येक प्रकार की मिट्टी की भौगोलिक स्थिति को स्पष्ट रूप से चित्रित करता है।

Question 1. Which soil occupies most of the areas in Maharashtra?
Answer: Black (Regur) soil occupies most of the areas in Maharashtra.
In simple words: Black or Regur soil is the most widespread soil type across Maharashtra.

🎯 Exam Tip: Identify the most dominant soil type in Maharashtra by observing the largest colored area on the map legend and its corresponding distribution.

Question 2. In which areas are laterite soils found?
Answer: Laterite soil is found in Raigad, Ratnagiri, Sindhudurg and some parts of Gadchiroli and Nashik.
In simple words: Laterite soils are primarily found in the coastal districts of Raigad, Ratnagiri, and Sindhudurg, with some presence in Gadchiroli and Nashik.

🎯 Exam Tip: Pinpoint the specific districts on the map where the color representing laterite soil is present for a precise answer.

Question 3. Which soil is found in parts of the Sahyadri ranges?
Answer: Yellow Brown soil is found in parts of the Sahyadri ranges.
In simple words: Yellow-brown soil is characteristically found in the regions comprising the Sahyadri mountain ranges.

🎯 Exam Tip: Locate the Sahyadri ranges on the map and identify the soil type prevalent in that geographical area.

Question 4. In which region is alluvial soil found?
Answer: Alluvial soil is found in Mumbai Suburban District, Mumbai city district some parts of Thane & Palghar district.
In simple words: Alluvial soil is present in the Mumbai Suburban and City districts, as well as parts of Thane and Palghar.

🎯 Exam Tip: Use the map to identify the specific coastal and near-coastal districts where alluvial soil is indicated.

Question 5. Which soil is found in the river valleys of Maharashtra?
Answer: Fertile Alluvial Soil is found in the river valleys of Maharashtra.
In simple words: Fertile alluvial soil typically lines the river valleys across Maharashtra, benefiting from river deposits.

🎯 Exam Tip: Understand that river valleys are generally characterized by the presence of fertile alluvial soils due to deposition processes.