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Soil horizon in tropical area and soil in temperate areas
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Soil horizons in tropical areas and in temperate areas
by shiv
what is a soil horizon
types of horizon
Tropical soil horizion
Soil in the tropical rainforests is very nutrient poor. The topsoil is only one to two inches 2.5 to 5 centimeters deep. The only reason plant life is so lush is because the plants store the nutrients in themselves rather than getting them from the soil. When plants decay, other growing plants tap the nutrients from the dead matter and reuse nutrients left over from that plant.
Trees depend on soil for; stability, nutrients, and water. Most nutrient cycling takes place in the top two feet of soil where supplies of air, water and food allow microorganisms to thrive. These include bacteria, fungi and algae.
soil animals, e.g earthworm, carry humus deeper
into the soil
All layers (horizons) are well drained some nutrients are carried away (leached) into the groundwater
Roots from the plants penetrate
all horizons.
Temprate soil horizon
All generalizations about soil systems have significant exceptions, but two generalizations
that differentiate temperate from tropical soils are quite tenable. First, because temperate
soils are seasonally cold, during a significant portion of the year, plant growth and soil
biological activity are low or nil due to suboptimal or freezing soil temperatures.
Seasonality with its temperature fluctuations results in important changes in the chemical
and physical soil environment.
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