write the process of soil formation and it's factor. for 8marks . explain in details.class 11
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Answer:
Soils are formed through the interaction of five major factors: time, climate, parent material, topography and relief, and organisms. The relative influence of each factor varies from place to place, but the combination of all five factors normally determines the kind of soil developing in any given place.
Role of Precipitation: The variability in the precipitation modifies the composition of the soil. For Example- Areas with little rainfall and a high rate of evaporation led to the accumulation of salts in the soil. The soils underlying tropical rain forests tend to be nutrient-poor because of intensive leaching due to heavy rains.
4. Role of temperature: It also plays an important role because fluctuations in temperature causes shrinking and swelling, frost action, and general weathering in soil.
3. Biota (Flora, Fauna, and Microorganisms): Biota, in conjunction with climate, modifies parent material to produce soil. For Example- Leguminous plants (such as beans, peas, and groundnuts) have nitrogen-fixing bacteria. These plants take the nitrate ions directly from these nitrogen-fixing bacteria. It improves the fertility of the soil by fixing atmospheric nitrogen to ammonia or ammonium.