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Subjects

Geography

Soil formation processes

In this Class 11 Geography topic from Geomorphic Processes, students learn how soil develops through the weathering of rocks and the gradual interaction of parent material, climate, organisms, relief and time. The topic explains key processes such as the addition and loss of materials, transformation of minerals and the movement of clay and other substances within the soil profile. It also helps students understand soil horizons, profile development and the influence of erosion and drainage on soil formation.

Expert · Level 5 · 25 questions

Practice questions

01In a lithosequence study, which factor is mainly considered variable?

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02What is the basis for understanding soil change in a climosequence?

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03On what basis is soil development compared in a biosequence?

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04Why do soil moisture and depth change in a toposequence?

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05Formation of an argillic horizon can indicate which process?

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06Shiny clay coatings in soil can be evidence of what?

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07What is the main result of lessivage?

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08Movement of metal compounds in cheluviation is associated with what?

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09Which change is generally associated with brunification in soil?

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10Rubification is related to development of which colour in soil?

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11In melanisation, what produces the dark colour of soil?

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12Which residues remain relatively more in ferrallitic soil formation?

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13A calcic horizon is identified by accumulation of which material?

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14A gypsic horizon is related to accumulation of which mineral?

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15Why does surface soil hardness increase when duricrust forms?

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16Which condition is important in the formation of plinthite?

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17Why is a self-ploughing effect seen in Vertisols?

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18How does cryoturbation affect soil formation?

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19What is the general meaning of pedoturbation?

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20How does bioturbation affect soil structure?

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21How can termite mounds change local soil formation?

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22Why is mycorrhiza important in the soil system?

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23Why is the rhizosphere considered a special zone in soil formation?

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24What is the main difference between weathered regolith and true soil?

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25Why can soil remain immature on recent alluvial deposits?

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