This document discusses different types of soils found around the world based on their formation and characteristics. It describes several major categories of soils including zonal soils which are fully mature, azonal soils which are immature, and intrazonal soils which are partially mature. Specific soil types are then outlined, such as tundra soils, podsols, grey brown forest soils, prairie soils, chernozems, chestnut-brown soils, grey desert soils, red desert soils, red and yellow forest soils, and red tropical soils. Each soil type has distinct features related to climate, vegetation, composition, and other factors.
The agroecological zones of Bangladesh have been identified on the basis of four elements such as physiography, soils, land levels in relation to flooding and agroclimatology. ... These 30 zones have been subdivided into 88 agroecological sub-regions, which have been further subdivided into 535 agroecological units.
By; Mahedi Hasan Zahid
Student at IUBAT Under the College of Agricultural Sciences.
Batch; 192
This document discusses basin morphometry, which involves quantitatively measuring the shape and geometry of drainage basins. It describes various linear, aerial, and relief properties that are measured, such as stream order, length, and number, drainage density, basin area and relief. These morphometric properties provide insights into surface processes, tectonic activity, and hydrological characteristics like flooding and sediment yield. Quantifying basin morphology allows comparisons between basins and improved modeling of terrain and hydrological systems.
Climatic geomorphology and morphogenetic regions Sadia Zaman
Climatic geomorphology examines the relationship between climate and landforms. It identifies that different climatic zones produce different landforming mechanisms and resultant landforms that reflect the dominant climate. According to climatic geomorphology theory, landforming processes are controlled by mean temperature, mean precipitation, and other climatic factors such as rainfall intensity, frost intensity, wind direction and power. The concept proposes that each climate type develops characteristic assemblages of landforms through distinctive geomorphic processes. Peltier divided the world into nine morphogenetic regions based on mean annual temperature and rainfall, with different combinations of these climatic parameters producing distinct weathering regions.
The document discusses the differences between land use and land cover. Land use refers to how humans use the land, such as for agriculture, settlements, or mining. Land cover refers to the physical attributes of the land surface, such as vegetation, water, or bare soil. The United States Geological Survey developed a widely used land use and land cover classification system in the 1970s that categorizes land into classes such as urban, agricultural, forest, water, and wetlands. The system was designed to be applied using remote sensing data and aims to achieve consistent land classifications.
This document outlines 9 fundamental concepts in geomorphology. It introduces geomorphology as the description and interpretation of earth's landforms. Some key concepts discussed are:
- The principle of uniformitarianism, which states that geological processes have operated consistently over time, though intensities may have varied.
- Geological structure strongly influences landform evolution and is reflected in topography.
- Individual geomorphic processes leave distinctive imprints and develop characteristic landform assemblages.
- Landforms develop through successive stages as erosional processes act on the earth's surface over time.
- Most of the world's topography developed during the Pleistocene and is influenced by past geological and climatic changes.
Davis and Penk proposed different models of the cycle of erosion. Davis' model involved three stages - youth, maturity, and old age - where a landscape evolves from high relief to a flat plain over time. Penk emphasized the relationship between uplift and erosion, with landforms resulting from their competition. Later theorists like King and Gilbert built on these ideas but acknowledged no single model explains all landscapes given different environments. While influential, both Davis and Penk's concepts have limitations and underwent criticism regarding assumptions about rates of uplift and erosion.
This document discusses the classification of agro-ecological zones in India based on physiography, soil, climate, and length of growing period. It outlines how India can be divided into 5 major physiographic divisions (mountains, plains, plateau, coastal belts, islands) which are further divided into 19 ecological regions based on factors like climate, soil properties, and topography. Soil types, climate conditions, and length of growing period also influence the delineation of agro-climatic and agro-ecological zones in India for agricultural planning and development.
Geomorphology is the study of landforms and the processes that shape them. It is a branch of physical geography that analyzes relief features at different dimensions and scales. Relief features are organized into three orders based on size: first order includes continents and ocean basins shaped by plate tectics; second order consists of structural landforms like mountains and plateaus formed by constructional forces; third order comprises micro-level erosional and depositional landforms developed on second order features by exogenic processes like rivers and glaciers. Process geomorphology examines specialized subfields defined by the dominant shaping process, such as fluvial, glacial, coastal and karst landforms.
The agroecological zones of Bangladesh have been identified on the basis of four elements such as physiography, soils, land levels in relation to flooding and agroclimatology. ... These 30 zones have been subdivided into 88 agroecological sub-regions, which have been further subdivided into 535 agroecological units.
By; Mahedi Hasan Zahid
Student at IUBAT Under the College of Agricultural Sciences.
Batch; 192
This document discusses basin morphometry, which involves quantitatively measuring the shape and geometry of drainage basins. It describes various linear, aerial, and relief properties that are measured, such as stream order, length, and number, drainage density, basin area and relief. These morphometric properties provide insights into surface processes, tectonic activity, and hydrological characteristics like flooding and sediment yield. Quantifying basin morphology allows comparisons between basins and improved modeling of terrain and hydrological systems.
Climatic geomorphology and morphogenetic regions Sadia Zaman
Climatic geomorphology examines the relationship between climate and landforms. It identifies that different climatic zones produce different landforming mechanisms and resultant landforms that reflect the dominant climate. According to climatic geomorphology theory, landforming processes are controlled by mean temperature, mean precipitation, and other climatic factors such as rainfall intensity, frost intensity, wind direction and power. The concept proposes that each climate type develops characteristic assemblages of landforms through distinctive geomorphic processes. Peltier divided the world into nine morphogenetic regions based on mean annual temperature and rainfall, with different combinations of these climatic parameters producing distinct weathering regions.
The document discusses the differences between land use and land cover. Land use refers to how humans use the land, such as for agriculture, settlements, or mining. Land cover refers to the physical attributes of the land surface, such as vegetation, water, or bare soil. The United States Geological Survey developed a widely used land use and land cover classification system in the 1970s that categorizes land into classes such as urban, agricultural, forest, water, and wetlands. The system was designed to be applied using remote sensing data and aims to achieve consistent land classifications.
This document outlines 9 fundamental concepts in geomorphology. It introduces geomorphology as the description and interpretation of earth's landforms. Some key concepts discussed are:
- The principle of uniformitarianism, which states that geological processes have operated consistently over time, though intensities may have varied.
- Geological structure strongly influences landform evolution and is reflected in topography.
- Individual geomorphic processes leave distinctive imprints and develop characteristic landform assemblages.
- Landforms develop through successive stages as erosional processes act on the earth's surface over time.
- Most of the world's topography developed during the Pleistocene and is influenced by past geological and climatic changes.
Davis and Penk proposed different models of the cycle of erosion. Davis' model involved three stages - youth, maturity, and old age - where a landscape evolves from high relief to a flat plain over time. Penk emphasized the relationship between uplift and erosion, with landforms resulting from their competition. Later theorists like King and Gilbert built on these ideas but acknowledged no single model explains all landscapes given different environments. While influential, both Davis and Penk's concepts have limitations and underwent criticism regarding assumptions about rates of uplift and erosion.
This document discusses the classification of agro-ecological zones in India based on physiography, soil, climate, and length of growing period. It outlines how India can be divided into 5 major physiographic divisions (mountains, plains, plateau, coastal belts, islands) which are further divided into 19 ecological regions based on factors like climate, soil properties, and topography. Soil types, climate conditions, and length of growing period also influence the delineation of agro-climatic and agro-ecological zones in India for agricultural planning and development.
Geomorphology is the study of landforms and the processes that shape them. It is a branch of physical geography that analyzes relief features at different dimensions and scales. Relief features are organized into three orders based on size: first order includes continents and ocean basins shaped by plate tectics; second order consists of structural landforms like mountains and plateaus formed by constructional forces; third order comprises micro-level erosional and depositional landforms developed on second order features by exogenic processes like rivers and glaciers. Process geomorphology examines specialized subfields defined by the dominant shaping process, such as fluvial, glacial, coastal and karst landforms.
Models of landscape evolution and slope development by kingCharu Jaiswal
King proposed a model of landscape evolution and slope development consisting of three components: slope elements, hill slope development, and an epigene cycle of erosion. The slope elements include a waxing slope, free face, debris slope, and waning slope. Hill slopes develop through the parallel retreat of these slope elements, resulting in the expansion and merging of pediments. The epigene cycle involves periodic stream incision and escarpment retreat driven by erosion processes, forming new landscapes and cyclic surfaces over geological timescales. King's model emphasizes the role of erosion and semi-arid climates and rejects climatic influences on landscape development.
1) Agriculture is an important part of the Indian economy, with over half the population dependent on it until recent decades. The country can be divided into different agro-ecological regions based on factors like climate, soil and cropping patterns.
2) Key agro-ecological regions in India include the hot and dry western plains, the Deccan plateau region, the northern plains and central highlands, and the eastern Ghats region, each with characteristic climates, soils and common crops.
3) Properly identifying and understanding agro-ecological regions is important for agricultural development and policy across varied conditions in India.
Analysis of remote sensing imagery involves identifying targets through their tone, shape, size, pattern, texture, and relationships to other objects. Targets may be environmental or artificial features appearing as points, lines, or areas. Interpretation relies on how radiation is reflected or emitted from targets and recorded by sensors to form images. The key to interpretation is recognizing targets based on these visual elements.
Soil formation or pedogenesis is the combined effect of human impact on the environment, physical, chemical and biological processes working on soil parent material.
Role of electromagnetic Radiation in Remote SensingNzar Braim
This document provides an overview of electromagnetic radiation and its role in remote sensing. It defines key characteristics of electromagnetic waves like amplitude, wavelength, frequency, and speed. It describes the electromagnetic spectrum and different radiation types. Laws governing radiation like Kirchhoff's law, Stefan-Boltzmann law, and Wien's displacement law are covered. The document also discusses how radiation interacts with the atmosphere through scattering, absorption, and refraction.
Aerial photographs and their interpretationSumant Diwakar
Aerial photographs provide valuable information about the coastal and terrestrial environment when interpreted correctly. Vertical aerial photographs can be used to update existing maps and create new maps. Simple instruments can be used to correct horizontal distortion in aerial photographs and transfer information to line maps. More advanced photogrammetric equipment is required to correct for height displacement. Stereoscopic analysis of overlapping aerial photographs allows for three-dimensional interpretation of terrain and features.
This document outlines several approaches to agricultural geography:
1. The empirical (inductive) approach attempts to describe existing agricultural patterns by making generalizations based on numerous studies.
2. The normative (deductive) approach leads to the derivation and testing of hypotheses to develop ideal models of agricultural location.
3. Other approaches discussed include the environmental, commodity, economic, regional, systematic, system analysis, ecological, and behavioral approaches. Each looks at agricultural activities through a different analytical lens.
This is an assignment on Soil Types of India for the Subject of Natural Resource Management in India's Range Forest Officer's induction training Course. It was prepared during the Academy days and submitted to Kundal Academy of Development, Administration and Management (Forest), Sangli, Maharashtra.
How streams are classified? The most popular measurable terms classifying the flowing water body into "the stream order" are discussed in this presentation. .
The arrangement of these horizons in a soil is known as a soil profile. Soil scientists, who are also called pedologists, observe and describe soil profiles and soil horizons to classify and interpret the soil for various uses. Soil horizons differ in a number of easily seen soil properties such as color, texture, structure, and thickness.
soil profile diagram
soil profiles definition
characteristics of soil horizons
soil profile images
soil profile and soil catena
edible soil profile
soil horizons
layers of a soil profile
soil horizon descriptions
what is soil profile
different soil horizons
layers of a soil profile
characteristics of soil horizons
soil horizons diagram
types of soil profile
soil horizon and soil profile
interesting civil engineering topics
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A soil is composed primarily of minerals which are produced from parent material that is weathered or broken into small pieces. Like the classification systems for plants and animals, the soil classification system contains several levels of details, from the most general to the most specific types. The most general level of classification system is the soil order, of which there are 12 major types. This module explains these classes.
This document summarizes different agro-ecological regions and sub-regions of India based on climate, soil type, land use, and crop production characteristics. It describes 7 different eco-regions: 1) Cold Arid region with shallow skeletal soils in northwestern India, 2) Hot Arid region with desert and saline soils in western India, 3) Hot Arid region with red and black soils in southern India, 4) Hot Semi-Arid region with alluvium derived soils in northern India, 5) Hot Semi-Arid region with medium and deep black soils in central India, 6) Hot Semi-Arid region with shallow and medium black soils in west central India, and 7) Hot Semi
Soil degradation is a major problem in Bangladesh that affects 43% of the country's land. The main types of soil degradation are chemical, physical, and biological. Key drivers include low soil fertility, overextraction of groundwater, waterlogging, and deforestation. This degradation leads to reduced crop yields and productivity. Prevention efforts include strip farming, crop rotation, and contour farming to reduce erosion and replenish soil nutrients. Overall soil degradation is a serious threat to Bangladesh's agricultural sector that requires effective policy measures and new sustainable land management practices.
Soils in India are formed by the weathering of rocks and are influenced by climate, vegetation, relief and parent material. The eight major soil types according to ICAR are alluvial, black, red, laterite, desert, mountain, saline/alkaline and peaty/marshy soils. Alluvial soils cover a large area and are highly fertile, supporting agriculture. Soil erosion due to deforestation, overgrazing and other factors needs to be controlled through conservation measures like contour farming and afforestation.
This document discusses several theories of mountain building:
1. The geosyncline orogen theory of Kober proposes that mountains form in mobile zones called geosynclines that are surrounded by rigid land masses and subjected to contraction forces from Earth's cooling.
2. Jeffreys' thermal contraction theory attributes mountain-building forces to cooling of the Earth and slowing of its rotation. This explains the perpendicular orientation of mountains to continental margins.
3. Joly's radioactive theory proposes that heat from radioactive elements in the crust causes expansion and contraction cycles leading to deposition of sediments in geosynclines that are later compressed into mountains.
4. Daly proposed that gravity drives downhill sliding of continental masses. Holmes suggested
The document discusses the key factors that influence soil formation - parent material, climate, organisms, relief, and time. It describes how climate, especially precipitation and temperature, has one of the most significant impacts on soil development processes like leaching, translocation, and profile differentiation. The type of vegetation and parent material also determine properties of the resulting soil, such as texture, color, and acidity. Steeper slopes generally result in shallower, less developed soils due to increased erosion. Soil properties continue to change as more time passes and the soil matures.
This document discusses artificial groundwater recharge. It begins by defining artificial recharge as replenishing groundwater reservoirs through human activities. It then outlines the need for artificial recharge to improve water quality, conserve excess water, and enhance yields. The document describes various methods of artificial recharge including direct surface methods like flooding, basins, and streams as well as indirect subsurface methods like injection wells and fracturing. It also provides two case studies and discusses the advantages of artificial recharge like increased well yields and improved water quality.
This document provides an overview of watershed management and development. It defines a watershed and explains their importance for sustaining life. Watershed management aims to manipulate natural, agricultural, and human resources within a watershed to provide desired resources suitably. The objectives are to protect and improve land and water resources. Key perspectives include hydrological, environmental, socio-economic, financial, and administrative aspects. Approaches involve people's participation and a hierarchical organizational structure. Geological aspects that influence watersheds like soil, water, natural hazards are also described.
The document discusses the concept of geosynclines, which refers to thick piles of sediments deposited in deep marine basins that were later compressed, deformed, and uplifted to form mountain ranges. Geosynclines developed in three phases - first sediments accumulated in a subsiding trough (geosynclinal phase), then the deeply buried sediments folded under heat and pressure (tectonic phase), and finally horizontal compression forces uplifted the folded rocks to form mountains tens of thousands of meters high (orogenic phase). Geosynclines are classified as orthgeosynclines like eugeosynclines that formed far from continents with volcanic rocks, or parageosynclines like miogeosyn
The document describes the factors that influence the formation of a Podsol soil, including climate, relief, vegetation, drainage, parent material, and soil biota. It notes that Podsol soils form in cold, wet climates with coniferous forests, producing an acid humus layer and iron and aluminum being leached and pushed down into lower soil horizons. The cold climate and needle-shedding trees result in slow weathering and decomposition, thin topsoil, and fewer soil biota.
Soil has evolved over millions of years and is an important natural resource.
Soils in India can be classified as - Alluvial, Black, Red and Laterite soils. Their distribution, composition, characteristics such as color, texture, minerals, crops grown and it's conservation have been described.
Models of landscape evolution and slope development by kingCharu Jaiswal
King proposed a model of landscape evolution and slope development consisting of three components: slope elements, hill slope development, and an epigene cycle of erosion. The slope elements include a waxing slope, free face, debris slope, and waning slope. Hill slopes develop through the parallel retreat of these slope elements, resulting in the expansion and merging of pediments. The epigene cycle involves periodic stream incision and escarpment retreat driven by erosion processes, forming new landscapes and cyclic surfaces over geological timescales. King's model emphasizes the role of erosion and semi-arid climates and rejects climatic influences on landscape development.
1) Agriculture is an important part of the Indian economy, with over half the population dependent on it until recent decades. The country can be divided into different agro-ecological regions based on factors like climate, soil and cropping patterns.
2) Key agro-ecological regions in India include the hot and dry western plains, the Deccan plateau region, the northern plains and central highlands, and the eastern Ghats region, each with characteristic climates, soils and common crops.
3) Properly identifying and understanding agro-ecological regions is important for agricultural development and policy across varied conditions in India.
Analysis of remote sensing imagery involves identifying targets through their tone, shape, size, pattern, texture, and relationships to other objects. Targets may be environmental or artificial features appearing as points, lines, or areas. Interpretation relies on how radiation is reflected or emitted from targets and recorded by sensors to form images. The key to interpretation is recognizing targets based on these visual elements.
Soil formation or pedogenesis is the combined effect of human impact on the environment, physical, chemical and biological processes working on soil parent material.
Role of electromagnetic Radiation in Remote SensingNzar Braim
This document provides an overview of electromagnetic radiation and its role in remote sensing. It defines key characteristics of electromagnetic waves like amplitude, wavelength, frequency, and speed. It describes the electromagnetic spectrum and different radiation types. Laws governing radiation like Kirchhoff's law, Stefan-Boltzmann law, and Wien's displacement law are covered. The document also discusses how radiation interacts with the atmosphere through scattering, absorption, and refraction.
Aerial photographs and their interpretationSumant Diwakar
Aerial photographs provide valuable information about the coastal and terrestrial environment when interpreted correctly. Vertical aerial photographs can be used to update existing maps and create new maps. Simple instruments can be used to correct horizontal distortion in aerial photographs and transfer information to line maps. More advanced photogrammetric equipment is required to correct for height displacement. Stereoscopic analysis of overlapping aerial photographs allows for three-dimensional interpretation of terrain and features.
This document outlines several approaches to agricultural geography:
1. The empirical (inductive) approach attempts to describe existing agricultural patterns by making generalizations based on numerous studies.
2. The normative (deductive) approach leads to the derivation and testing of hypotheses to develop ideal models of agricultural location.
3. Other approaches discussed include the environmental, commodity, economic, regional, systematic, system analysis, ecological, and behavioral approaches. Each looks at agricultural activities through a different analytical lens.
This is an assignment on Soil Types of India for the Subject of Natural Resource Management in India's Range Forest Officer's induction training Course. It was prepared during the Academy days and submitted to Kundal Academy of Development, Administration and Management (Forest), Sangli, Maharashtra.
How streams are classified? The most popular measurable terms classifying the flowing water body into "the stream order" are discussed in this presentation. .
The arrangement of these horizons in a soil is known as a soil profile. Soil scientists, who are also called pedologists, observe and describe soil profiles and soil horizons to classify and interpret the soil for various uses. Soil horizons differ in a number of easily seen soil properties such as color, texture, structure, and thickness.
soil profile diagram
soil profiles definition
characteristics of soil horizons
soil profile images
soil profile and soil catena
edible soil profile
soil horizons
layers of a soil profile
soil horizon descriptions
what is soil profile
different soil horizons
layers of a soil profile
characteristics of soil horizons
soil horizons diagram
types of soil profile
soil horizon and soil profile
interesting civil engineering topics
seminar topics pdf
civil engineering topics for presentation
civil seminar topics ppt
best seminar topics for civil engineering
seminar topics for mechanical engineers
civil engineering ppt
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A soil is composed primarily of minerals which are produced from parent material that is weathered or broken into small pieces. Like the classification systems for plants and animals, the soil classification system contains several levels of details, from the most general to the most specific types. The most general level of classification system is the soil order, of which there are 12 major types. This module explains these classes.
This document summarizes different agro-ecological regions and sub-regions of India based on climate, soil type, land use, and crop production characteristics. It describes 7 different eco-regions: 1) Cold Arid region with shallow skeletal soils in northwestern India, 2) Hot Arid region with desert and saline soils in western India, 3) Hot Arid region with red and black soils in southern India, 4) Hot Semi-Arid region with alluvium derived soils in northern India, 5) Hot Semi-Arid region with medium and deep black soils in central India, 6) Hot Semi-Arid region with shallow and medium black soils in west central India, and 7) Hot Semi
Soil degradation is a major problem in Bangladesh that affects 43% of the country's land. The main types of soil degradation are chemical, physical, and biological. Key drivers include low soil fertility, overextraction of groundwater, waterlogging, and deforestation. This degradation leads to reduced crop yields and productivity. Prevention efforts include strip farming, crop rotation, and contour farming to reduce erosion and replenish soil nutrients. Overall soil degradation is a serious threat to Bangladesh's agricultural sector that requires effective policy measures and new sustainable land management practices.
Soils in India are formed by the weathering of rocks and are influenced by climate, vegetation, relief and parent material. The eight major soil types according to ICAR are alluvial, black, red, laterite, desert, mountain, saline/alkaline and peaty/marshy soils. Alluvial soils cover a large area and are highly fertile, supporting agriculture. Soil erosion due to deforestation, overgrazing and other factors needs to be controlled through conservation measures like contour farming and afforestation.
This document discusses several theories of mountain building:
1. The geosyncline orogen theory of Kober proposes that mountains form in mobile zones called geosynclines that are surrounded by rigid land masses and subjected to contraction forces from Earth's cooling.
2. Jeffreys' thermal contraction theory attributes mountain-building forces to cooling of the Earth and slowing of its rotation. This explains the perpendicular orientation of mountains to continental margins.
3. Joly's radioactive theory proposes that heat from radioactive elements in the crust causes expansion and contraction cycles leading to deposition of sediments in geosynclines that are later compressed into mountains.
4. Daly proposed that gravity drives downhill sliding of continental masses. Holmes suggested
The document discusses the key factors that influence soil formation - parent material, climate, organisms, relief, and time. It describes how climate, especially precipitation and temperature, has one of the most significant impacts on soil development processes like leaching, translocation, and profile differentiation. The type of vegetation and parent material also determine properties of the resulting soil, such as texture, color, and acidity. Steeper slopes generally result in shallower, less developed soils due to increased erosion. Soil properties continue to change as more time passes and the soil matures.
This document discusses artificial groundwater recharge. It begins by defining artificial recharge as replenishing groundwater reservoirs through human activities. It then outlines the need for artificial recharge to improve water quality, conserve excess water, and enhance yields. The document describes various methods of artificial recharge including direct surface methods like flooding, basins, and streams as well as indirect subsurface methods like injection wells and fracturing. It also provides two case studies and discusses the advantages of artificial recharge like increased well yields and improved water quality.
This document provides an overview of watershed management and development. It defines a watershed and explains their importance for sustaining life. Watershed management aims to manipulate natural, agricultural, and human resources within a watershed to provide desired resources suitably. The objectives are to protect and improve land and water resources. Key perspectives include hydrological, environmental, socio-economic, financial, and administrative aspects. Approaches involve people's participation and a hierarchical organizational structure. Geological aspects that influence watersheds like soil, water, natural hazards are also described.
The document discusses the concept of geosynclines, which refers to thick piles of sediments deposited in deep marine basins that were later compressed, deformed, and uplifted to form mountain ranges. Geosynclines developed in three phases - first sediments accumulated in a subsiding trough (geosynclinal phase), then the deeply buried sediments folded under heat and pressure (tectonic phase), and finally horizontal compression forces uplifted the folded rocks to form mountains tens of thousands of meters high (orogenic phase). Geosynclines are classified as orthgeosynclines like eugeosynclines that formed far from continents with volcanic rocks, or parageosynclines like miogeosyn
The document describes the factors that influence the formation of a Podsol soil, including climate, relief, vegetation, drainage, parent material, and soil biota. It notes that Podsol soils form in cold, wet climates with coniferous forests, producing an acid humus layer and iron and aluminum being leached and pushed down into lower soil horizons. The cold climate and needle-shedding trees result in slow weathering and decomposition, thin topsoil, and fewer soil biota.
Soil has evolved over millions of years and is an important natural resource.
Soils in India can be classified as - Alluvial, Black, Red and Laterite soils. Their distribution, composition, characteristics such as color, texture, minerals, crops grown and it's conservation have been described.
The document describes the different types of soils found in Assam, India. The main types discussed are alluvial soil, hill soil, lateritic soil, and piedmont soil. Alluvial soil is the most extensively distributed soil, found over river plains. It can be divided into younger alluvial soil near rivers and older alluvial soil further away. Hill soils in the southern hilly regions vary from red sandy to red loamy soils. Lateritic soils are found in the N.C. Hills district and parts of other districts. Piedmont soils are concentrated along the foothills of the Himalayas and include Bhabar and Tarai soils. The typical characteristics of Assam soils are acid
This document classifies and describes the major soil types in India. It identifies 10 major soil types: alluvial soil, red soil, black or regur soil, arid/desert soil, laterite soil, saline soil, peaty/marshy soil, forest soil, sub-mountain soil, and snowfields. Alluvial soil covers around 43% of India's land area and is highly fertile, found in river valleys and deltas. Red soil is porous and deficient in nutrients, seen in low rainfall areas. Black soil has high water retention and is best for cotton cultivation, covering much of the Deccan.
Major soil types in India include alluvial soils, which are deposited by rivers during floods and are very productive but often deficient in nutrients, red soils which are light-textured with porous structures and lacking in nutrients, and black soils which are mostly clay soils that crack during dry seasons and are known for growing cotton, though deficient in nutrients. Lateritic soils are also common, formed under high rainfall and characterized by leaching of nutrients.
Major soil types in India include alluvial soils, red soils, black soils, lateritic soils, desert soils, saline and alkaline soils, peaty and marshy soils, and forest and hill soils. Alluvial soils are very productive but often deficient in nitrogen, humus and phosphorus. Red soils are light textured with porous structures and are deficient in nitrogen, humus, phosphoric acid and lime. Black soils, also known as black cotton soils, are mostly clay soils that crack during dry seasons and are deficient in nitrogen, phosphorus and organic matter but rich in calcium, potassium and magnesium. Lateritic soils are low in nutrients like nitrogen, phosphorus, potassium, lime and magnesium.
Major soil types in India include alluvial soils, red soils, black soils, lateritic soils, desert soils, saline and alkaline soils, peaty and marshy soils, and forest and hill soils. Alluvial soils are very productive but often deficient in nitrogen, humus and phosphorus. Red soils are light textured with porous structures and are deficient in nitrogen, humus, phosphoric acid and lime. Black soils, also known as black cotton soils, are mostly clay soils that crack during dry seasons and are deficient in nitrogen, phosphorus and organic matter but rich in calcium, potassium and magnesium. Lateritic soils are low in nutrients like nitrogen, phosphorus, potassium, lime and magnesium.
There are several main types of soil described in the document. Black soil is dark grey to black in color with high clay content. It is found in India and suitable for cotton. Red soil forms from weathered rocks and is rich in iron but low in nutrients. Laterite soil forms in hot, wet climates and contains iron and aluminum oxides. Desert soil is sandy with low moisture and nutrients. Mountain soil is rich in humus but low in nutrients. Other soil types include saline/alkaline soils, peaty/marshy soils, loam, clay, glacial drift soil deposited by glaciers, and alluvial soil deposited by rivers.
Soil is a complex mixture that forms the top layer of Earth's crust. It is influenced by climate, vegetation, relief, parent material and human activities. The main types of soil found in India are black soil, red soil, alluvial soil, laterite soil, desert soil, mountain soil and forest soil. They differ in properties based on factors like texture, color, moisture and nutrient content.
This document provides summaries of different soil types found in India:
- Black soil is dark grey to black in color with high clay content. It is found in 5.4 lakh sq km and suitable for cotton.
- Red soil is formed from weathered crystalline rocks. It is more sandy, less clayey, and poor in nutrients like phosphorus and nitrogen.
- Laterite soil is formed under high rainfall and contains remnants of iron and aluminum oxides.
- Desert soil originates from wind deposits and is porous, coarse, and low in moisture and nutrients.
This document provides summaries of different soil types found in India:
- Black soil is dark grey to black in color with high clay content. It is found in 5.4 lakh sq km and suitable for cotton.
- Red soil is formed from weathered crystalline rocks. It is more sandy, less clayey, and poor in nutrients. It covers 3.5 lakh sq km.
- Laterite soil is brown to yellowish in color and forms a hard material used for building when exposed to air.
- Desert soil is sandy, porous, and low in nutrients and moisture. It covers 1.4 lakh sq km.
- Mountain soil is rich in humus and found in northeastern
The document describes the main soil groups found in India: alluvial soils, black soils, red soils, laterites and lateritic soils, and other minor groups. It provides details on the origin, characteristics, distribution, common crops, problems, and management of each soil group. Alluvial soils are formed by river deposition and come in new and old varieties. Black soils are high in clay and known for cotton and cereal production. Red soils are shallow to deep and suitable for cereals, millets, and plantation crops. Laterites are formed under tropical conditions and contain iron/aluminum oxides.
Soil is the top layer of earth's crust consisting of organic and inorganic matter that supports plant growth and living organisms. Soil formation is influenced by factors like relief, parent rock, climate, vegetation, and time. The major soil types in India are alluvial, black, red and yellow, laterite, arid, and forest soils. Alluvial soils are the most widespread and fertile soils, deposited by Himalayan river systems in northern India. Black soils, also known as regur soils, are clay-rich and moisture-retentive, found in the Deccan trap region. Red and yellow soils develop in dry, crystalline rock areas with low rainfall. Laterite soils form in hot,
The document describes several major soil types found in India:
- Black soil, also known as Regur or Black Cotton soil, is dark grey to black with high clay content and moisture retention. It covers 5.4 lakh square kilometers and is suitable for cotton.
- Red soil forms from weathered crystalline rocks. It is more sandy, less clayey, and poor in nutrients like phosphorus and nitrogen. It covers 3.5 lakh square kilometers.
- Laterite soil forms in hot, wet climates and is high in iron and aluminum oxides, giving it a brown to yellow color. It is used as a building material.
- Desert soil is sandy, porous, and low in nutrients
This document provides information about soil, including its definition, components, formation processes, types, properties, classification, surveys, and relationship with plants. It begins by defining soil from traditional, geologic, engineering, and agronomic perspectives. The main components of soil are described as being decomposition, translocation, leaching, and weathering. The document then discusses the major soil types found in India and their characteristics. It also outlines some key physical and chemical properties of soil and how soil surveys are conducted. In the end, it briefly explains the important relationship between soil and plants.
The document discusses different types of soil found in India. It begins by thanking those who helped with the soil project. It then provides information on soil formation and describes the major soil types in India - alluvial, black, red and yellow, laterite, forest/mountain, and arid soils. For each soil type, it discusses characteristics, location, and crops grown. In total, six major soil types are described that cover different percentages of India's total land area. The document concludes with information on soil erosion and conservation methods.
The document summarizes the 8 physical regions of North America: Western Cordillera, The Intermountain Range, The Interior Plains, The Coastal Plains, The Appalachian Region, The Great Lakes and St. Lawrence Lowland, The Canadian Shield, and The Arctic. Each region is described in terms of its topography, climate, vegetation, economic activity, and environmental concerns. The document provides detailed information on the defining geographic characteristics of each region.
The document discusses the distribution and causes of different types of problematic soils in India, including acidic soils which cover 49 million hectares, or 9.3% of the country's total geographical area. It outlines the main factors that can lead to the formation of acidic, saline, sodic, saline-sodic, calcareous, and acid sulfate soils. Problematic soils pose challenges for agricultural land use due to their composition and environmental conditions.
Similar to Soil types-1, zonal soil , azonal soil (20)
Five Scientists Who Have Contributed on Charge Development of Soil Arvind Yadav
The Origin of Negative Charges in Soil :-
Isomorphous Substitution-
Major source of negative charges in 2:1 layer clays and called permanent or pH independent charge.
Silicon in the tetrahedral sheet is subjected to replacement by ions of similar size, usually by Al3+ and produce one net negative charge.
Al in the octahedral sheet maybe replaced by Mg2+ , without disturbing the crystal structure and produce one net negative charge.
The difference in dimension of substituted ions was reported to be NO more than 15%, and the valency between those substituted ions should not differ more than one unit.
Such a substitution takes place following the Goldschmidt’s laws of crystal chemistry.
2 ) The Dissociation of Exposed Hydroxyl Groups :-
The appearance of OH groups on crystal edges or on exposed planes, can also give rise to negative charges.
Especially at high pH, the hydrogen of these hydroxyls dissociate slightly, and the surface of clay is left with the negative charges of the oxygen ions.
This type of negative charge is called variable charge or pH-dependent charge.
The magnitude of the variable charge varies with pH and type of colloids.
It is an important type of charge for 1:1 layer, iron and aluminum oxide clays and organic colloids.
The Origin of Positive Charges in Soil :-
Soil colloids may also exhibit positive charges as well as negative charges.
The positive charges make possible anion exchange reaction and are very important in phosphate retention.
These charges are arise from the protonation or addition of H+ ions to hydroxyl groups. The mechanism depends on pH and the valence of the metal ions.
It is usually important in Al and Fe oxide clays, but it is of less important in Si-oxides.
At a soil pH<ZPC, the surface of the mineral is positively charged and has the capacity to attract anions.
If an Al3+ ion substitutes for one of the Mg2+ ions, a positive charge results. Such positive charges are characteristic of trioctahedral sheets of chlorites.
Goldschmidt’s :
Law 1- Isomorphous replacement of one cation by another, without incurring any
change in the order of the crystal pattern, is permitted provided that the radii of the
cation replaced and the cation substituting it agree with in 15%.
Isomorphous replacement is responsible for permanent net negative charge.
2. H.V. Helmholtz- German Scientist:
The concept of Zero point charge (ZPC) was first proposed by Hermann Von
Helmholtz, in the late 19th century.
He also proposed ZPC term first time.
ZPC is the pH at which Charge on surface of mineral particle is Zero.
3. K. H. Tan:
In 1979, K.H. Tan proposed the concept of variable charge soils, which are soils that contain both permanent and variable surface charges.
He demonstrated that the permanent charge is due to the presence of isomorphic substitution, which leads to a net negative charge on soil particles.
The term “variable charge” is used to describe organic and inorganic soi
post harvest management of cut flower , cut flower ,harvest management of fl...Arvind Yadav
This document discusses post-harvest management of cut flowers. It begins by introducing cut flowers as high-value but highly perishable crops. It then discusses how cut flowers deteriorate after harvesting due to respiration and factors like temperature, food supply, and ethylene accumulation. Proper temperature management and adequate food supply can help minimize deterioration by reducing respiration rate. The document emphasizes that cool chain management is essential to maintain flower quality after harvesting. It lists factors affecting post-harvest life and discusses best harvest times, pre-cooling, pulsing, and floral packaging techniques.
1. The document discusses floral craft, which involves using dehydrated flowers and foliage to create decorative items through artistic arrangement and presentation.
2. Dehydrated flowers and leaves can be used to make three-dimensional flower arrangements for interior decoration and have a reasonably long shelf life if protected from moisture and dust.
3. Different decorative items like paperweights, pen stands, and wall clocks can be made through floral craft and act as substitutes for fresh flowers in interior decoration.
protected cultivation of orchid and dendrobiumArvind Yadav
This document discusses the protected cultivation of Dendrobium orchids. It describes the ideal temperature, light, humidity and carbon dioxide levels for growing them in greenhouses. Some suitable growing media and containers are mentioned, along with sterilization and spacing recommendations. It also covers varieties, propagation methods, nutrition, pest and disease control, harvesting, post-harvest handling including grading, storage and packaging.
This document lists the names of various climbing plants and vines in multiple languages or common names, along with their botanical names and family classifications. It includes curtain creeper, rangoon creeper, golden shower, purple wreath, clematis, jacquemontia, wisteria, passion flower, aristolochia, honey suckle, railway creeper, trumpet flower, and money plant. All of the climbing plants and vines are identified with both their common or regional name as well as their scientific botanical name and family.
Identification of annuals, annuals classification of annuals , annuals Arvind Yadav
This document provides information on the identification and characteristics of various annual flower plants. It begins by defining annuals as plants that complete their life cycle within one growing season. It then provides tables with the botanical name, family, height, color, and uses of over 50 different annual flower varieties. These include calendula, pansies, petunia, zinnia, and sunflower. The document emphasizes the importance of color selection for bedding and describes how different color combinations can create different visual effects.
This document lists common palm and fern species, including their scientific names. It includes Royal Palm, Bottle Palm, Areca Palm, Fish Tale Palm, Chamaedorea, Livistonia, Phoenix roebelenii, Pritchardia, Rhapis, Washingtonia, Licuala grandis, Zamia, Adiantum, Asplenium, Platycerium, Osmunda regalis, Alsophila, and Cycas. For each species, it typically lists the common name followed by the scientific name.
This document outlines various garden features categorized into plant components, non-plant features, and garden adornments. Plant components include lawns, hedges, flower beds, rockeries, carpet beds, and topiary. Non-plant features comprise pergolas, footpaths, garden roads, arches, trellises, patios, decking, and shade gardens. Garden adornments that can be used for decoration are floral clocks, bird baths, statues, lanterns, benches, and urns/tubs.
This document provides information on the dry flower industry in India. It discusses what dry flowers are, their uses, advantages over fresh flowers, and the production and export of dry flowers in India. Some key points:
- Dry flowers can last for years and are used for decorative items like bouquets and potpourri. India exports over 10,000 tons of dry flowers annually, mainly to the US, Europe, and Asia.
- The dry flower industry in India is valued at over $55 million and employs thousands. Major production areas are in Tamil Nadu, West Bengal, and Andhra Pradesh.
- Air drying and desiccant drying using materials like silica gel are common methods used to
Micro irrigation, drip irrigation , what is drip irrigation ,what is fertigat...Arvind Yadav
This document summarizes the key advantages and components of micro irrigation systems. It discusses how drip irrigation can save water and increase crop yields compared to flood irrigation. The document also provides details on fertigation through drip systems, including common fertilizers used and methods for application. Trial results are presented showing higher tomato yields and water use efficiency with drip irrigation compared to surface irrigation or microsprinklers. Overall, the document demonstrates how micro irrigation technologies like drip can improve irrigation efficiency and agricultural productivity.
Thyme , CULTIVATION OF TYME , PRODUCTION TECHNOLOGY OF THYME Arvind Yadav
This document provides information about thyme, including its scientific classification, uses, origin and distribution, botany, climate and soil requirements, varieties, cultivation practices, harvesting, and value-added products. Some key points:
- Thyme is a perennial herb native to Mediterranean regions. It is used culinary and medicinally.
- It has a chromosome number of 2n=30 and its edible portions are its aerial parts. Major varieties include English thyme and lemon thyme.
- Thyme grows best in warm climates and well-drained, calcareous soil. It is cultivated for its leaves and flowers, which are harvested 5 months after planting.
- Common cultivation practices
Centre of origin, PRIMERY CENTRE OF ORIGIN , SECONDRY CENTER OF ORIGIN PLACE Arvind Yadav
The document discusses N.I. Vavilov's concept of primary and secondary centers of origin for crop plants. It identifies eight main centers proposed by Vavilov: China, Hindustan, Central Asia, Asia Minor, Mediterranean, Abyssinian, Central America, and South America. Examples of key crop plants originating from each center are provided, such as mango and banana from Hindustan, apple and grape from Central Asia, fig and pomegranate from Asia Minor, and coffee from Abyssinian.
Fennel , CULTIVATION OF FENNEL , PRODUCTION TECHNOLOGY OF FENNEL ,Arvind Yadav
Fennel (Foeniculam vulgare) is an annual aromatic herb that grows 4-5 feet tall with yellow flowers. The commercial part used is the dried ripe fruit. Fennel seed is light green to grey, 4-5 mm long and contains 0.2% volatile oil including 80% anethole. India is a top producer of fennel seed, growing it commercially in states like Gujarat and Rajasthan. Fennel grows best in dry, well-drained soil and a cool climate with 150-300mm of annual rainfall.
Cultivation of marigold. production technology of marigold .Arvind Yadav
Genomic classification of marigold.African marigold(Tagetes erecta).CN- 2n=24.Family-Composity/Asteraceae. Origin ---Maxico and South america.
French marigold(Tagetes patula).CN-2n=48
.Family-composity/Asteraceae
.Origin-Maxico and South america
There are about 33 species of the genus tagetes. Some of important are fallows1-Tagetes erecta(African marigold)2-Tagetes ptula(French marigold ). Other important species1-Tagetes tenuifolia-(Bushy type, Less than 30cm)2-Tagetes lacera-(Grow upto 120-150cm in height)3-tagetes lemmonii(Glow upto 60-70cm height besrs small slowers)There are about 33 species of the genus tagetes. Some of important are fallows1-Tagetes erecta(African marigold)2-Tagetes ptula(French marigold ). Other important species1-Tagetes tenuifolia-(Bushy type, Less than 30cm)2-Tagetes lacera-(Grow upto 120-150cm in height)3-tagetes lemmonii(Glow upto 60-70cm height besrs small slowers)
Propagation of rootstocks in temperate fruits final. ROOTSTOCK . WHAT IS ROOT...Arvind Yadav
Propagation of rootstocks is more than 2000 yrs old practice.
Sexual –seeds
Asexual-suckers
Seeds being collected & extracted from indigenous populations of native fruit species, germinated and grown for use as rootstock.
Ex: Apple, pear, apricot, peach, plum, sweet cherry, sour cherry, almonds and walnuts.
RootstocksSeedling rootstocks
Clonal rootstocks
Seedling rootstocks
Clonal rootstocks
Seedling rootstocks
Clonal rootstocks
Vermicomposting :- Vermicomposting is a method of making compost with the use of earthworms which generally live in the soil eat biomass and excrete it is digested form .This compost is generally called vermicompost
Vermiculture :- vermiculture means scientific method of breeding and raising earthworms in controlled condition
Materials required for vermicomposting prepration
Tea processing. steps in tea processing .Arvind Yadav
The document summarizes the five main stages of tea processing in Sri Lanka: 1) Withering removes moisture from freshly harvested leaves over 12-18 hours using troughs with blown air, 2) Rolling twists the withered leaves to release juices for oxidation over 15-45 minutes, 3) Fermentation is a biochemical oxidation process where flavors are produced in humidified rooms over 23-29°C, 4) Drying arrests fermentation and reduces moisture to 3% using hot air between 90-160°C, 5) Grading sorts dried leaves by size and appearance before packaging in airtight containers.
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...PECB
Denis is a dynamic and results-driven Chief Information Officer (CIO) with a distinguished career spanning information systems analysis and technical project management. With a proven track record of spearheading the design and delivery of cutting-edge Information Management solutions, he has consistently elevated business operations, streamlined reporting functions, and maximized process efficiency.
Certified as an ISO/IEC 27001: Information Security Management Systems (ISMS) Lead Implementer, Data Protection Officer, and Cyber Risks Analyst, Denis brings a heightened focus on data security, privacy, and cyber resilience to every endeavor.
His expertise extends across a diverse spectrum of reporting, database, and web development applications, underpinned by an exceptional grasp of data storage and virtualization technologies. His proficiency in application testing, database administration, and data cleansing ensures seamless execution of complex projects.
What sets Denis apart is his comprehensive understanding of Business and Systems Analysis technologies, honed through involvement in all phases of the Software Development Lifecycle (SDLC). From meticulous requirements gathering to precise analysis, innovative design, rigorous development, thorough testing, and successful implementation, he has consistently delivered exceptional results.
Throughout his career, he has taken on multifaceted roles, from leading technical project management teams to owning solutions that drive operational excellence. His conscientious and proactive approach is unwavering, whether he is working independently or collaboratively within a team. His ability to connect with colleagues on a personal level underscores his commitment to fostering a harmonious and productive workplace environment.
Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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How to Fix the Import Error in the Odoo 17Celine George
An import error occurs when a program fails to import a module or library, disrupting its execution. In languages like Python, this issue arises when the specified module cannot be found or accessed, hindering the program's functionality. Resolving import errors is crucial for maintaining smooth software operation and uninterrupted development processes.
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UPRAHUL
This Dissertation explores the particular circumstances of Mirzapur, a region located in the
core of India. Mirzapur, with its varied terrains and abundant biodiversity, offers an optimal
environment for investigating the changes in vegetation cover dynamics. Our study utilizes
advanced technologies such as GIS (Geographic Information Systems) and Remote sensing to
analyze the transformations that have taken place over the course of a decade.
The complex relationship between human activities and the environment has been the focus
of extensive research and worry. As the global community grapples with swift urbanization,
population expansion, and economic progress, the effects on natural ecosystems are becoming
more evident. A crucial element of this impact is the alteration of vegetation cover, which plays a
significant role in maintaining the ecological equilibrium of our planet.Land serves as the foundation for all human activities and provides the necessary materials for
these activities. As the most crucial natural resource, its utilization by humans results in different
'Land uses,' which are determined by both human activities and the physical characteristics of the
land.
The utilization of land is impacted by human needs and environmental factors. In countries
like India, rapid population growth and the emphasis on extensive resource exploitation can lead
to significant land degradation, adversely affecting the region's land cover.
Therefore, human intervention has significantly influenced land use patterns over many
centuries, evolving its structure over time and space. In the present era, these changes have
accelerated due to factors such as agriculture and urbanization. Information regarding land use and
cover is essential for various planning and management tasks related to the Earth's surface,
providing crucial environmental data for scientific, resource management, policy purposes, and
diverse human activities.
Accurate understanding of land use and cover is imperative for the development planning
of any area. Consequently, a wide range of professionals, including earth system scientists, land
and water managers, and urban planners, are interested in obtaining data on land use and cover
changes, conversion trends, and other related patterns. The spatial dimensions of land use and
cover support policymakers and scientists in making well-informed decisions, as alterations in
these patterns indicate shifts in economic and social conditions. Monitoring such changes with the
help of Advanced technologies like Remote Sensing and Geographic Information Systems is
crucial for coordinated efforts across different administrative levels. Advanced technologies like
Remote Sensing and Geographic Information Systems
9
Changes in vegetation cover refer to variations in the distribution, composition, and overall
structure of plant communities across different temporal and spatial scales. These changes can
occur natural.
How to Add Chatter in the odoo 17 ERP ModuleCeline George
In Odoo, the chatter is like a chat tool that helps you work together on records. You can leave notes and track things, making it easier to talk with your team and partners. Inside chatter, all communication history, activity, and changes will be displayed.
Reimagining Your Library Space: How to Increase the Vibes in Your Library No ...Diana Rendina
Librarians are leading the way in creating future-ready citizens – now we need to update our spaces to match. In this session, attendees will get inspiration for transforming their library spaces. You’ll learn how to survey students and patrons, create a focus group, and use design thinking to brainstorm ideas for your space. We’ll discuss budget friendly ways to change your space as well as how to find funding. No matter where you’re at, you’ll find ideas for reimagining your space in this session.
Leveraging Generative AI to Drive Nonprofit InnovationTechSoup
In this webinar, participants learned how to utilize Generative AI to streamline operations and elevate member engagement. Amazon Web Service experts provided a customer specific use cases and dived into low/no-code tools that are quick and easy to deploy through Amazon Web Service (AWS.)
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
1. EDITED BY :- ARVIND YADAV
ID :- 721 ,BATCH :-2017,
ARVINDY2510@BUAT721
BANDA UNIVERSITY OF AGRICULTURE AND
TECHNOLOGY BANDA
2.
3. Due to variations in soil texure, pH values,
colour, structure and consistence, a variety of
soils occur in the world.
On the basis of maturity, soils can be classified
into three broad groups :
• Zonal soils
Soils which are fully mature and have well developed profile.
• Azonal soils
Soils are of recent age and not mature, do not have a
developed soil profile as they have not undergone climatic
and biological action for longer duration.
• Intrazonal soils
Soils are half mature and have been formed under
inadequate drainage which produces alkalinity and salt
accumulation. Such soils are formed in between the main
belts of zonal soils.
4. Classified into two groups, viz.
• Pedalfers
Non lime accumulating soils have and abundance of
aluminium and iron compounds
• Pedocals
Lime accumulating soils with abundance of calcium
compounds
5. Tundra soils
• Found in tundras, always covered with snow and ice
round the year.
• Due to low temperatures, vegetal growth is poor and
so the soils lacks humus content.
• In summer when the snow melts large areas are
covered with water and so water logging occurs
which makes the soil illdrained and poorly aerated.
So the oxidation process is withheld.
• Under these conditions the top soil is covered with
an layer of humus beneath which is a blue-grey layer
of clay, silt and sand.
• The blue-grey colour is due to insufficient oxidation
of ferrous-iron compound.
6. Podsols
• Russian word which means “ash beneath”.
• Soils have ash-grey colour in the A2 horizon.
• Characteristics soils of coniferous forest area, chiefly found in the
mid latitudes of Europe, Siberian Russia and North America.
• Temperature are cool and the rainfall and snowfall doesnot
exceeds 5 cm. per year.
• Top soil is covered with a layer of needle-like leaves, below which
lies the black humus.This imparts and acidic character to it.
• Podsols are leached soils.
• Leaching is not due to heavy rainfall but is an account of the
sudden melting of snow with the onset of the summer season.
• Strong leaching of bases is noticeable in the A2 horizon which has
high silica contents.
• Leaching also causes accumulation of collides and the oxides of
iron and aluminium in the B horizon.
• So B1 horizon is often reddish-brown, some times having an
accumulation of iron pan while B2 horizon is a buff-coloured layer.
• On account of heavy leaching these soils are unfertile and have
limited use in crop cultivation.
• Acidic in character, having low pH values.
7. Grey brown forest soils
• Found in mid-latitudes where broad leaved deciduous trees
grow as in western Europe , north China, north-eastern United
States and parts of southern Russia.
• Suffer from leaching which imparts them grey colour in the A1
horizon.
• Deciduous trees shed their leaves before the commencement
of winter.
• In winters snow falls upon this thick mantle of dead leaves
which undergo a slow process of decomposition to yield mild
humus on the top soil, and also return many bases to the lower
layers of the soil abstracted by plants.
• A2 horizon is grey-brown in colour due to slight leaching.
• Soils are productive and so vast areas have been deforested for
cultivation.
• Due to deficiency of calcium salts, liming and manuring are
often needed.
• B horizon is darker due to accumulation of salts of iron and
aluminium oxides.
8. Prairie soils
• Found in temperate grassland called prairie and
steppes in North America and central parts of
Asia.
• Climate is moist and cool with snowfall in
winters.
• have neither lime accumulation nor ferrous
accumulations and are neither acidic nor basic
the rainfall is high enough to percolate through
the soluble salts of calcium carbonate but
evaporation is not high enough to cause
capillary action and upward movement of salts .
• Tall grasses produces high humus .
• Soils are fertile .
9. Chernozems
• Fertile of soils of central Asia ,Ukraine and Canadian
prairies where the are grasses are short and
precipitation is little, nor exceeding 53 cm per year.
• Rainfall is mostly in summers and winters the ground
is covered with snow which thaws at the onset of
spring.
• Black crumby soils.
• A1 horizon is of great thickness which is rich in organic
matter owing to thick sod layer at the top layer.
• Little leaching in winter due to melting snow and
rainfall.
• A2 horizon is rich in lime having nodules of calcium
carbonates which accumulate due to upward
movement of water through capillary action in the
winter period of drought.
• B horizon is not well differentiated and contains brown
coloured calcium carbonate concretions.
• Because of rich humus content and fertile soil and
mainly used to cultivate wheat.
10. Chestnut-brown and brown soils
• Found in semi-arid lands, they are calcareous soils,
having nodules of calcium carbonate in B horizon,
and therefore, they belong to the pedocal group.
• Closely resemble the chernozem soils and usually
occur on the margins of chernozems.
• But in the areas of brown soils the rainfall is even
less and only short tussocky grasses grow.
• So lacks in humus and the colour remains brown.
• Unleached soils having rich parent material.
• On account of low rainfall, lack of humus and
generally infertility such soils can hardly be used
for agriculture and are best utilised as pasture.
11. Grey desert soils
• Occurring in the mid-latitude deserts of Central Asia, North
America and Europe, these soils are typically grey in colour and
may show pale reddish tinge.
• Usually such deserts are surrounded by high mountains or exist in
the form of inter-montanne plateaus e.g. Colorado and Utah in the
USA.
• Due to lack of rainfall, the vegetation cover is thin and the soils
have low humus content – ‘Sierozems’.
• In arid areas, evaporation of water far exceeds precipitation. So the
water tends to rise up by capillary action bringing the
underground salts to the top soil layer.
• Soluble salts are mostly carbonates of calcium, sodium and
magnesium which often impart grey-white colour.
• Some times thick layers of lime deposits may be found deposited
on the surface called as ‘Caliche’
• Soils are fine textured, rich in plant nutrients and hence fertile.
12. Red desert soils
• These soils range from pale-reddish grey, through
reddish brown to deep red.
• Found in hot tropical deserts where rainfall is less than
50 cm per year.
• Vegetation is sparse and spasmodic and so there is a
general lack of humus in the soil.
• The alluvial erosion is to a minimum while the aeolian
erosion is maximum. So the soil is coarse-grained,
highly permeable and well drained.
• A horizon is red due to the presence of parent material
but the B horizon has a ‘Kankar Pan’ of calcareous
matter.
• Calcium salts may sometimes rise up through capillary
action, forming saline surface encrustations.
• Alkaline soils having pH values of more than 8.
• Rich in nitrogen content and so productive.
13. Red and yellow forest soils
• found in areas of high temperatures and rainfall, particularly in
sub tropical latitudes as in south-east China, south-east United
States and south-east Brazil.
• Climatic conditions promote the growth of forests and fairly dense
ground vegetation causing thick litter.
• Litter is easily decomposed by heavy bacterial growth and so the
humus formation is much less.
• On account of high rainfall the leaching action is more
pronounced.
• Most of the alkalies and colloides are washed down into the B
horizon, leaving the top mantle acidic.
• Top soil has a thick layer of leaf litter, below which lies a very thin
layer of black humus.
• The A1 horizon is reddish due to the abundance of parent
material and may sometimes more than a foot deep.
• The A2 horizon is light buff coloured because of the presence of
many colloids and bases leached out by the A1 horizon.
• The B horizon is dark coloured, as it is a zone of accumulation of
most of the salts.
• Due to low humus contents, these soils soon lose fertility when
cultivated.
14. Red tropical Soils
• They are also called latosols. Their formation is characteristic in
those areas which have abundant moisture and warm
temperatures, as in the equatorial forests of Congo, Amazon and
Malaya.
• On account of typical climatic conditions these soils are deeply
weathered and highly leached. They do not show distinct
horizons.
• The red soils may be grouped into four sub classes viz. ferrillictic,
ferrisols, ferruginous soils and vertisols.
• The ferrallitic soils are those which have been intensively
weathered to great depths and that are highly leached. They are
characteristic of older land surfaces within the tropics.
• Perrisols. like the ferrallitic soils are highly weathered, but their
superficial material is continuously removed by surface erosion
and so there is little differentiation in their horizons.
• Ferruginous soils develop in savanna type climates and
monsoonal climates where there are alternating wet and dry
seasons. They display a better horizon development, the A
horizon having more humus contents.
• Vertisols, also called as ‘black clays' are found in depressions of
tropical, wet areas, having a clear dry season in some parts of the
year.They are poorly drained and fine-textured.
• In more dry areas, they display an accumulation of salt on the top
layer due to upward movement of water through capillary action.
15. • Laterites are red brick-like soils and the term was first applied to
the hard, red soils found in Madras. Now it is applied to all
extremely hard, red tropical soils. They occur in areas where the
moist and dry seasons alternate.
• 'Laterisation' is a process in which the soils are heavily leached of
silica and alkali salts, leaving behind a concentration of insoluble
salts of aluminium and iron, which are mostly their sesquioxides.
• This first stage of laterisation begins in the wet season. But in the
dry season the second stage of the process occurs in which the soil
solution is drawn back up towards the surface by capillary action.
Thus the hydrated oxides of iron and aluminium accumulate, bind
together to form a crust at or near the surface.
• Sometimes the iron compounds form nodule and concretions in the
soil also.
• Laterisation may make the soils sterile.
• Laterite soils are found in coastal parts of peninsular India, West
Indies, southern Brazil and tropical Africa.
16. Soils develop under special circumstances in zonal soils e.g. when
there is imperfect drainage or the predominance of parent rock
material.They are categorized into three main groups.
• Hydromorphic
have an excess of soil moisture on account of water-logging as in low-
lying areas.
This may impede water drainage and cause lack of aeration which may
eventually diminish the bacteriological action in the soil causing
accumulation of under-composed organic matter to greater depths.
In the lower horizons, ferrous iron may not get oxidized and these
horizons may look blue-grey colour. The entire process is called
'gleyzation‘which means a gley horizon of undecomposed organic
matter.
Hydromorphic soils are commonly found in tundras where temperature
is too low to cause any bacterial activity and the summer melting of snow
and ice may cause accumulation of water in depressions.
Bog soils, peat soils and meadow soils are other forms of hydromorphic
soils.
17. Soils, which have a high soil content, are usually associated with
pedocals e.g. chernozems, brown soils and desert soils.
These saline soils are found in dry continental interiors as in the Aral-
Caspian depression, American cordilleras etc.
They have an abundance of salts like the chlorides, sulphates arid
carbonates of sodium, calcium and magnesium,
It is estimated that 40 percent of the arid areas of the world are
covered with these intra zonal soils.
These soils have been further sub-divided into three main groups :
• Solanchaks
They are formed in most arid areas where evaporation far exceeds precipitation and so on
account of the upward movement of ground water soluble salts of potassium, sodium, calcium
and magnesium accumulate on the upper layer of the soil in the form of saline crusts.
• Solonetz
They are also alkaline soils but here the deposition of soluble salts is in the B horizon instead
of the top layer of the soil. This happens when the solonchaks get subjected to a prolonged
period of moist climate in which the salt salts collected at matter at the top layer are again
washed down due to increased rainfall and the alkalis collected in the B horizon.
• Soloths
Also called as solods, these are former saline soils which have undergone continued
improved drainage and leaching periods, leading to the removal of alkali salts even from the
B horizon, thus making them more fertile.
18. Soils have rich lime contents consisting of calcium carbonate
and their their formation is affected by the parent material
instead of climatic factors.
These soils which are also called ‘Calcisols’ occur in limestone
regions where most of the parent materials is calcareous.
All regions of karst topography in the world have this type of
soil.They are of two types:
• Rendzinas:
They develop on limestone rocks under moist conditions, as in southern Poland
coastal parts ofYugoslavia, Greece and Alabama (U.SA.).
They are also called ‘Brown Earth’, because their A horizon is dark-coloured,
friable and rich in organic content.
• Terra Rosa:
They are heavy clayey soils, rich in lime and sesquioxides of aluminium and
silicon.
They are formed in drier climatic conditions, as in the Mediterranean climatic
zones.
19. Poorly developed soils having no distinct horizon development.
Three types are usually found :
• Lithosols
Typical soils of young mountains which have high slope gradient.
Very thin and usually get washed down due to run-off in periods of rainfall.
course texture, little organic matter and poor vegetal growth.
• Regosols
Deep, soft, unconsolidated deposits of organic matter in areas of wind-blown
sands, glacial drifts , glacial outwash plains and volcanic ash.
Finest e.g. loess deposits of central Europe, southern Russia, north-western
China, north central United States, and Argentina.
Glacial tills of Sweden, Norway, Finland and Denmark.
• Alluvium
Also called as entisols, formed by the erosion and transportation of sand, silt and
clay by streams and rivers.
‘Khadar’ and ‘Bangar’ deposits of Ganga plains in India.
Found in flood plains, valley bottoms or deltaic regions.