What is Nitisols soil?
A nitisol in the World Reference Base for Soil Resources (WRB) is a deep, red, well-drained soil with a clay content of more than 30% and a blocky structure. Nitisols correlate with the kandic alfisols, ultisols and inceptisols of the USDA soil taxonomy.
How Nitisols are formed?
The formation of Nitisols involves the following processes: 1 ‘ferralitization’, i.e. intensive hydrolysis of weathering minerals combined with leaching of silica and bases, and relative accumulation of (meta)halloysite, kaolinite and sesquioxides.
Where are Nitisols found?
Occupying 1.6 percent of the total land surface on Earth, Nitisols are found mainly in eastern Africa at higher altitudes, coastal India, Central America, and tropical islands (Cuba, Java, and the Philippines).
What is Calcimorphic soil?
Calcimorphic or calcareous soils develop from a limestone. It has two sub-types: Rendzina soils are thin soils with limited available water capacity. Terra rossa soils are deep red soils associated with higher rainfall than rendzina. Hydromorphic soils form in wetland conditions.
Which is the richest soil?
Porous loamy soils are the richest of all, laced with organic matter which retains water and provides the nutrients needed by crops. Sand and clay soils tend to have less organic matter and have drainage problems: sand is very porous and clay is impermeable.
What is the best type of soil for agriculture?
Loamy-textured soils
Loamy-textured soils are commonly described as medium textured with functionally-equal contributions of sand, silt, and clay. These medium-textured soils are often considered ideal for agriculture as they are easily cultivated by farmers and can be highly productive for crop growth.
What is Regosol soil?
Definition of Regosols For all practical purposes, Regosols are soils in unconsolidated mineral material of some depth, excluding coarse textured materials and materials with fluvic properties, and have no diagnostic horizons other than an ochric horizon.
What is Halomorphic soil?
of a soil. : developed in the presence of neutral or alkali salts or both.
Which country has best soil?
Ten of the most fertile countries include Bangladesh, Denmark, the Ukraine, Moldova, India, Hungary, Rwanda, Comoros, Togo and Gambia. There are a few types of soil that are considered highly fertile. Each type of soil consists of different types of nutrients that contribute to the growth and health of crops.
Which soil is best for farming?
Loamy-textured
What is A Nitisol in geography?
Distribution of nitisols A nitisol in the World Reference Base for Soil Resources (WRB) is a deep, red, well-drained soil with a clay content of more than 30% and a blocky structure. Nitisols correlate with the kandic alfisols, ultisols and inceptisols of the USDA soil taxonomy.
What is a nitic horizon in soil science?
Soils having a nitic horizon (a horizon with pronounced nut-shaped soil structure and significant amount of active iron) within 100 cm from the soil surface, and gradual to diffuse horizon boundaries between the surface and the underlying horizons. They do not have a ferric, plinthic or vertic horizon within 100 cm from the soil surface.
What is the natural vegetation on the Nitisols?
The natural vegetation on nitisols includes tropical rain forest and savannah. Limitations frequently include low phosphorus availability and low base status, but once ameliorated, these deep, stable soils have high agricultural potential, and are often planted to crops.
How many Nitisols are there in Africa?
There are 260 million hectares of Nitisols (oxic or rhodic Alfisols and Oxisols) and similar soils in Africa that have anion exchange capacity in the subsoil, where roots of Sesbania and similar agroforestry trees can penetrate ( Sanchez et al., 1997Sanchez et al., 1997aSanchez et al., 1997b ).