Sahel

Sahel

An east-west zone of semidesert along the southern fringes of the Sahara, frequently drought-stricken, with an erratic annual rainfall ranging from 150 to 500 mm; also a vegetation zone in which the savanna tropical grasslands grade first into scrubland and then desert.

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Part of Speech: noun
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Industry/Domain: Agriculture
Category: Rice science
Company: IRRI
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sahel

Weather; Meteorology

1. The region of poor and intermittent rains south of the Sahara Desert in Africa. 2. A strong dust-bearing desert wind in Morocco.

sahel

Geography; Physical geography

A region in the centre of west africa on the margins of the sahara and prone to drought.

watershed

Agriculture; Rice science

The total area from which a single river collects surface water runoff; the catchment or drainage area of a river system.

watershed degradation

Agriculture; Rice science

A marked deterioration in the hydrological behavior of a river system which reduces the potential of land and water by causing a water flow of inferior quality, quantity and ...

waterlogging

Agriculture; Rice science

Impeded drainage; or soil saturated with water but not necessarily with standing water.

waterlogged field

Agriculture; Rice science

A field which continuously has standing water and cannot be drained. The water level may not be deep.

water use efficiency

Agriculture; Rice science

1). Expressed in terms of dry matter or harvested portion of the crop produced per unit of water consumed. 2). Ratio of the water used for evapotranspiration, seepage, and ...

water table

Agriculture; Rice science

The upper surface of ground water and the level below it where the soil is saturated with water.

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Industry/Domain: Geography Category: Physical geography

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