By What is Luvisol soil?
Luvisols are a group of soils, comprising one of the 32 Reference Soil Groups in the international system of soil classification, the World Reference Base for Soil Resources (WRB). They are widespread, especially in temperate climates, and are generally fertile. Luvisols are widely used for agriculture.
What are Orthic soils?
Orthic. These are the most widespread of the Chernozemic soils and represent the central concept of the order (or the “true” Chernozem). The A horizons (Ah, Ahe, Ahk, Ap, Apk) meet the criteria for a Chernozemic A horizon. The A is followed by one or more B horizons (Bm, Bmk, Btj, Bnjtj) at least 5 cm thick.
Is Luvisolic soil good for farming?
The clayey Bt horizons are slowly permeable to water and difficult for roots to grow into. Despite these limitations, and the cool climate that limits the range of crops, Gray Luvisols can be improved with good farming.
Where are Luvisols found?
Luvisols extend over 500 to 600 million hectares worldwide, for the greater part in temperate regions such as west/central Russia, the USA and central Europe, but also in the Mediterranean region and southern Australia. In subtropical and tropical regions, Luvisols occur mainly on young land surfaces.
What causes GLEY soil?
The chemical reduction of iron and manganese produces the characteristic gley colors. Both gleying and mottling 2 develop if a soil is waterlogged for extended periods of time.
What is the soil like in Ethiopia?
The soils are clay loam to clayey in texture with bulk density values ranging from 1.12 to 1.32 g cm−3 and basic infiltration rate varying from slow to moderate (0.4 to 3.3 cm hr−1). They were moderately acidic to neutral in pH (5.5 to 7.1) and had very low to medium organic carbon (OC) (0.27 to 2.98%).
Where is the richest soil in the world?
Places with the richest soil in the world are Eurasian Steppe; Mesopotamia; from Manitoba, Canada, as far south as Kansas; the central valley of California; Oxnard plain and the Los Angeles basin; Pampas lowlands of Argentina and Uruguay.
What is Histic Epipedon?
A surface soil horizon, not less than 1 m in depth, high in organic carbon, and saturated with water for some part of the year. See also humus (2). The name is from the Greek histos, meaning ‘web’.
What is Solonetzic soil?
Solonetzic soils, often called burnout or gumbo soils, are characterized by a tough, impermeable hardpan that may vary from 5 to 30 cm (2 to 12 in.) or more below the surface. This hardpan severely restricts root and water penetration of the subsoil.
Is gley a clay?
8.3 Cambic gley soils are loamy or clayey, with no significantly clay-enriched subsoil. 8.5 Humic-alluvial gley soils are loamy or clayey alluvial soils with a humose or peaty topsoil.