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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 3 · 25 questions

Practice questions

01Comparison of different soils on the basis of chronosequence is most helpful in understanding what?

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02Study of soils formed on similar parent material under different climates is linked with which sequence?

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03What is the main controlling factor of soil change in a toposequence?

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04Which aspect of soil formation is most clearly shown by a lithosequence?

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05What relationship does the catena concept explain in soil formation?

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06Accumulation of clay in the B horizon after strong washing is an example of which process?

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07Removal of basic elements in a very humid region may increase which soil tendency?

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08In podzolization acidic water can help move which type of material downward?

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09Why do iron and aluminium residues remain relatively more in laterization?

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10What is the most suitable reason for formation of a calcic horizon in dry areas?

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11Which colour indication may result from iron reduction in waterlogged soil?

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12What may be the main reason for reduced water infiltration in sodic soil?

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13What problem may develop in the upper layer when humification is very slow?

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14What immediate effect can rapid mineralization have on soil nutrients?

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15What change is possible in minerals like feldspar through hydrolysis?

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16Why does carbonation affect soil formation in limestone regions?

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17What can develop in soil due to alternating oxidation and reduction?

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18Why is good granular structure beneficial for seeds and roots in soil?

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19If soil becomes highly compacted what effect is likely?

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20Which process may increase in a semi arid area with high evaporation and weak drainage?

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21In which situation can capillary action most increase soil salinity?

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22Dark brown or black colour in soil often indicates what?

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23Why may soil formed from basaltic parent material contain relatively more of some nutrients?

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24Why can sandy texture develop in soil formed from granitic parent material?

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25What may be the general effect of silt dominance in soil formed from loess?

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