Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Subirrigation" Definition
noun
The application of water in such manner that it will reach the roots of agricultural crops without appearing at the surface. Under this term is also included natural subirrigation, or the occurrence of water beneath the surface (and of benefit to crops) due to natural causes. Subirrigation may be by percolation through sands or gravels, or through pipes or drain-tile suitably arranged. See the extract under subirrigate.
Source: Century Dictionary
Irrigation below the surface (as by a periodic rise of the water table or by a system of underground porous pipes).
Source: Merriam-Webster
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