Examine the distinctive characteristics of soils of the himid tropical regions
CAMEROON GCE JUNE 2012
The humid tropical regions are regions that are found in low lattitudes, located between latitude 23 and half ° north and south of the equator. The major soils types here include FERRALLITIC, FERRUGINOUS, TROPICAL BLACK EARTH, AND DESERT SOILS examine below.
- Ferrallitic soils are common in the tropical rainforest or equatorial regions formed as a result of high rainfall ( 2500mm) within the tropics. These soils results from much leaching, as such though chemical weathering is high due to favourable climatic conditions, bases are washed (leached) downward while insoluble iron and Aluminium sesqui oxides remain on the surface to give the poor reddish brown ferrallitic soils. These soils are found in Amazon basins, Congo basins and south Cameroon low plateau.
The main characteristics include;
- They contain abundant litter.
- Rate of breakdown of litter through decomposition is high.
- Laterization is a common pedogenic regime.
- Soils are extremely deep without any clear horizons, due to thorough mixing by soil organisms.
- Soils has a deep red yellowish colour owing to high concentration of iron and aluminium oxides.
- They are formed under tropical grassland regions.
- They have outstanding dry and wet periods.
- Capilary action is common during dry periods.
- Leaching is common during wet seasons.
- Soils are generally infertile and can not support any meaningful farming.
- Has deep black colour.
- Contain much calcium carbonate.
- Common in Tropical grasslands with seasonal drought.
- Fairly drained and resembles chernozems.