Soil Types and Characteristics

Vocabulary flashcards detailing the formation, distribution, composition, and characteristics of Alluvial and Black soils as discussed in the Geography notes.

Alluvial Soil

Soil formed by silt deposition brought by the Indus, Ganga, and Brahmaputra river systems, commonly found in the Eastern Coastal Plains and piedmont plains.

Bangar

Old Alluvial soil that has a higher concentration of kankar nodules and is less fertile with coarse particles in the upper reaches of river valleys.

Khadar

New Alluvial soil that consists of more fine particles and is more fertile than Bangar soil.

Piedmont plains

Areas such as Duars, Chos, and Terai where Alluvial soil is distributed.

Black Soil

Also known as 'regur' or 'black cotton soil', it is formed by the weathering of lava-flow rocks and is ideal for growing cotton.

Kankar nodules

Nodules found in higher concentrations in Bangar soil compared to Khadar soil.

Regur

An alternative name for Black Soil, defined by its clayey material and moisture-holding capacity.

Indus, Ganga, and Brahmaputra

The three important Himalayan river systems responsible for the formation of Alluvial soil through silt deposition.

Composition of Alluvial Soil

Contains adequate proportions of potash, phosphoric acid, and lime.

Composition of Black Soil

Made of extremely clayey material containing calcium carbonate, magnesium, potash, and lime, but poor in phosphoric contents.

Aeration in Black Soil

The process facilitated by the development of deep cracks in the soil during hot weather.

Deccan Plateau

The primary region of distribution for Black Soil, covering Maharashtra, Saurashtra, Malwa, Madhya Pradesh, and Chhattisgarh.

Lava-flow rocks

The specific type of rocks whose weathering leads to the formation of Black Soil.

Alkaline Soil

Soil occurring in drier areas of Alluvial regions that can be productive after proper treatment and irrigation.