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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 1 · 25 questions

Practice questions

01The combined effect of parent material and climate in soil formation is best shown by which situation?

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02What is the most logical reason for reduced topsoil nutrient status in a humid region with intense leaching?

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03What may be the main reason for differences between soils on an upper slope and a valley floor?

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04Under which condition will the relation of residual soil with parent rock remain most evident?

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05Which is the correct pair of eluviation and illuviation in a soil profile?

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06The formation of lateritic soil in humid tropics is more closely associated with what?

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07Under which condition is calcification relatively more likely?

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08Why may the upper horizon appear light in podzolization?

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09What may be the main cause of secondary salinization in dry irrigated areas?

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10Grey or bluish grey colour in waterlogged soil may indicate which process?

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11What is the correct difference between humification and mineralization in soil?

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12Why can soils on north facing and south facing slopes differ within the same area?

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13Why does humus not always remain very high even when organic litter is abundant in dense forests?

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14Clear development of soil horizons indicates which condition?

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15Why may the soil profile be weakly developed on a young alluvial plain?

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16What may a decrease in base saturation of soil generally mean?

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17What may be one reason for difference between soil formed from granite and soil formed from basalt?

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18How does hydrolysis in chemical weathering affect soil formation?

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19Under which conditions can iron oxidation in soil be more evident?

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20Why may highly drained sandy soil have low nutrients?

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21Why can clayey soil have a higher possibility of waterlogging?

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22Why is root growth affected when soil structure is poor?

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23Why is soil formed from loess deposits often considered useful for agriculture?

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24Why can young soil formed from volcanic ash be fertile in some areas?

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25The shrink and swell property of black cotton soil may be linked with what?

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