What are ferralitic soils?
Ferralitic soils are highly weathered and leached soils of the humid tropics enriched in iron and aluminum relative to silica and all major cations. Primary minerals are generally absent except for quartz, and the dominant secondary minerals are some combination of kaolinite, gibbsite, goethite and hematite.
What is Ferralsols 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.
How is Plinthite formed?
Plinthite is a redoximorphic feature in highly weathered soil. The product of pedogenesis, it commonly occurs as dark red redox concretions that usually form platy, polygonal, or reticulate patterns. Generally, plinthite forms in a soil horizon that is saturated with water for some time during the year.
What is Ferrosol soil?
Ferrosols are deep, well structured soils with a red or red-brown colour. In Tasmania they have formed mainly from the weathering of basalt, a volcanic rock extruded as lava by numerous small volcanoes in northern Tasmania some 10-50 million years ago. This means that Ferrosols are relatively old soils in Tasmania.
What are ferruginous soils?
As these soils lack precise definition, and they are termed as red ferruginous soils (Pal et al., 2000a, Rengasamy et al., 1978), which denote that they are rubefied soils (7.5 YR to 2.5 YR hue) of tropical India characterized by reddish colour, stable structure mainly by the influence of iron oxides, poor base status.
What is Haplic soil?
HAPLIC: A term used in the Australian Soil Classification (Isbell, 2002) which indicates that the major part of the upper 0.5 m of the soil profile is whole coloured. These soils are not disturbed or indented by pressure of the forefinger. These harder setting soils tend to result in high runoff.
What are Plinthic soils?
Plinthosols are soils with ‘plinthite’ – a firm but soft, iron‐rich, red‐mottled clay, made up of a humus‐poor mixture of kaolinite, quartz and other constituents that irreversibly hardens to petroplinthite when exposed to repeated wetting and drying.
What is Plinthic?
Plinthite (Gr. plinthos, brick) is an iron-rich, humus-poor mixture of clay with quartz and other highly weathered minerals. It commonly occurs as reddish redox concentrations in a layer that has a polygonal (irregular), platy (lenticular), or reticulate (blocky) pattern.