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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.

Hard · Level 4 · 25 questions

Practice questions

01Why can the texture of river alluvial soil vary from place to place?

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02Why can local rock influence be weaker in transported parent material?

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03What is the correct meaning of biological mixing in soil formation?

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04Why are root fungal associations like mycorrhiza important in soil plant relations?

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05How can deep roots in grasslands increase organic matter in soil?

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06Why can soil profile development slow after deforestation?

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07How does terracing help in soil conservation?

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08What adverse effect can excessive ploughing have on soil structure?

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09Why is the effect of drainage in soil formation not limited only to waterlogging?

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10Why is a deep profile more likely on a stable flat surface?

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11Why are young and thin soils common on steep slopes?

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12The sequence O A B C of soil horizons generally indicates what?

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13Why is the mixture of humus and mineral particles in the A horizon important?

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14The light colour of the E horizon is generally related to which process?

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15Why can the texture of the B horizon be heavier than the A horizon?

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16Why is studying the C horizon helpful for understanding parent material?

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17Under which circumstance is weak development of soil horizons expected?

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18If climate is similar but parent materials differ why will soils still differ?

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19Which statement best describes the interaction of soil forming factors?

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20What improvement in soil development is possible by adding organic manure in agriculture?

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21Which condition is most dangerous in the balance between soil formation and soil erosion?

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22What combined effect can removal of ground cover have in a high rainfall slope area?

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23Which is the most analytical description of the role of water in soil formation?

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24Which is the most scientific conclusion in the study of soil formation?

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25Chelation in soil formation is most closely related to what?

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