Examine any four factors of soil formation. [6] mark
Answers
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.
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Organisms
All living organisms actively influence the soil forming process. These organisms include bacteria, fungi, vegetation and animals. Their major influence is the effect on the chemical and physical environment of the soils.
Most, if not all of Plymouth County, was originally in native forest of mixed hardwoods and conifers in varying proportions. The mineral element content of leaves and branches varies depending on the type of forest vegetation, and influences the characteristics of the soils that develop beneath it. Hardwoods characteristically take up bases (calcium, magnesium, and potassium) from the soil and return them to the soil surface in the form of organic litter; thus recycling the soil nutrients. Coniferous trees tend to be low in bases, consequently soils developed beneath them tend to be more acid. Bases are also more susceptible to leaching beneath coniferous trees. Mixing of the soil, due to tree throws, is also a characteristic of woodland soils.
2.Climate:
Climate, particularly temperature, precipitation and frost action have a profound influence on the soil forming processes which occur within a region. The kind of climate largely determines the nature of the weathering processes that will occur and the rates of these chemical and physical processes. It directly affects the type of vegetation in an area which in turn will affect those soil forming processes related to vegetation.