explain any five factots responsible for the formation of soil?
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Answer:
Five factors of soil formation. Scientists attribute soil formation to the following factors: Parent material, climate, biota (organisms), topography and time. These factors interact to form more than 1,108 different soil series in Minnesota.
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Factors responsible for soil formation : Parent material, climate, biota (organisms), topography and time.
PARENT MATERIAL:
CLIMATE:
Temperature and precipitation influence how fast parent materials weather and, thus, soil properties such as mineral composition and organic matter content. Temperature directly influences the speed of chemical reactions. The warmer the temperature, the faster reactions occur. Temperature fluctuations increase physical weathering of rocks. Precipitation governs water movement in the soil. The amount of water the soil receives and the amount of evapotranspiration that occurs influence water movement. Normal annual precipitation in Minnesota is the least in the northwest corner at 16 inches, and increases as you go toward the southeast corner, where 34 inches is the normal annual precipitation.
BIOTA:
Biotic agents have greatly affected the soil formation process. These include organisms that live in the soil, such as bacteria and gophers, and vegetation growing on the surface. Organisms in the soil can speed up or slow down soil formation. For example, microorganisms can facilitate chemical reactions or excrete organic substances to improve water infiltration in the soil. Other organisms such as gophers slow soil formation by digging and mixing soil materials, and destroying soil horizons that have formed.
TOPOGRAPHY:
Slope and aspect are two topography features that affect soil formation. Slope refers to steepness (in degrees or percent) from horizontal, which affects how much soil material is deposited or eroded. Level soil is the most developed, as it doesn’t lose or gain material. It’s the change in material that slows the soil-forming process. Aspect is the direction the slope faces relative to the sun (compass direction), which affects the amount of water that moves through the soil.
TIME:
Time is the fifth factor in soil formation. Over time, vegetation and climate act on parent material and topography. Development, not chronological age, determines a soil’s age. The degree of aging depends on the intensity of the other four soil-forming factors.
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