What is Ferralsol soil?
What is Ferralsol soil?
Ferralsols are old soils, or are soils that are developed in strongly weathered parent materials. There is usually no evidence of recent deposition in the profile, such as volcanic ash or fresh alluvium. Thin bedding or rook structure is normally absent, since the material has often been reworked by the soil fauna.
Where can Ferralsols be found?
Ferralsols form principally in humid tropical zones under rainforest, scrub and thorn, or savanna vegetation on flat to gently sloping uplands. They are typically found on old landscapes that have been subject to shifting cultivation for millennia.
What are the characteristics of Ferralsols?
Ferralsols are characterized by relative accumulation of stable primary and secondary minerals; easily weathering primary minerals such as glasses and ferro-magnesian minerals and even the more resistant feldspars and micas have disappeared completely.
How are Ferralsols formed?
Formation of Ferralsols occurs under climatic conditions that favor both leaching and intense weathering: conditions common in regions with a wet tropical/monsoonal, subtropical or warm temperate climate.
What is Podzolization of soil?
Definition of podzolization : a process of soil formation especially in humid regions involving principally leaching of the upper layers with accumulation of material in lower layers and development of characteristic horizons specifically : the development of a podzol.
What is soil Gleying?
Gleying 1 is a technical term that describes the gray, blue, purple or green soil colors that occur in soils that have been waterlogged 1 for prolonged periods of time. Anaerobic 2 microbes flourish in the absence of air, reducing iron and manganese minerals.
What is Hydromorphic soil?
Abstract. Hydromorphic soils are characterised by the reduction or localised segregation of iron, owing to the temporary or permanent waterlogging of the soil pores which causes a lack of oxygen over a long period.
Are Oxisols good for plant growth?
Most nutrients in Oxisol ecosystems are contained in the standing vegetation and decomposing plant material. Despite low fertility, Oxisols can be quite productive with inputs of lime and fertilizers.
What is oxisol used for?
Uses. Oxisols are often used for tropical crops such as cocoa and rubber. In some cases, rice is grown on them.
What does Podzolized mean?
: a process of soil formation especially in humid regions involving principally leaching of the upper layers with accumulation of material in lower layers and development of characteristic horizons specifically : the development of a podzol.
How does ferralsol affect the quality of soil?
In weathered tropical soils, such as Ferralsols, rates of C loss caused by cultivation are often considered many times faster than those for temperate soils, with a substantial deterioration in soil quality often in less than 10 years, thus proper OM management is necessary for sustainable agriculture on these soils (Shang and Tiessen, 1997 ).
What is the ABC profile of a ferralsol?
Ferralsols have an ABC profile. Deep and intensive weathering has resulted in a high concentration of residual, resistant primary minerals alongside sesquioxides and well-crystallized kaolinite.
Where does the scientific name ferralsol come from?
Ferralsol is derived from Latin terms ferrum, iron, and alum, aluminum. Internationally, Ferralsols are known as Oxisols (Soil Taxonomy, USA), Latosols (Brazil), Sols ferralitiques (France), and Lateritic soils.
Where are ferralsols found in the tropical rainforest?
Ferralsols form principally in humid tropical zones under rainforest, scrub and thorn, or savanna vegetation on flat to gently sloping uplands. They are typically found on old landscapes that have been subject to shifting cultivation for millennia. Their parent material is strongly weathered material on old, stable geomorphic surfaces.
