Subirrigation of soils is a way to water soils through subsurface or from groundwater at highstand of its table. Irrigation water is supplied through the pipes laid at a depth of 40-60 cm (subsurface irrigation), or groundwater is replenished by different methods and from its surface moisture comes to the rootage zone by capillary way.

Subirrigation of soils has some advantages over surface irrigation, because it allows saving irrigation water, reducing the number of surface hoeing operations and usually leads to rise of crop yield.

At subirrigation of soils, soil salinization control is complicated. Irrigation and ground waters should be fresh.

Source: Dictionary of the All-Russian Institute of Scientific and Technical Information of the Russian Academy of Sciences

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