subirrigationn.
/ˌsʌbɪrᵻˈɡeɪʃn/, U.S. /ˌsəbɪrəˈɡeɪʃ(ə)n/ The irrigation of land or crops from beneath the soil surface, typically by means of underground channels or pipes.
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the world > food and drink > farming > cultivation or tillage > preparation of land or soil > irrigation > [noun] > sub-irrigation
subirrigation1835
subbing1895
1835 J. C. Loudon Encycl. Gardening (new ed.) iii. 848 Though a wet sub-soil is undoubtedly unfavourable to the growth of asparagus, yet it is certain that the power of sub-irrigation is highly favourable to it.
1880 News & Press (Cimarron, New Mexico) 19 Aug. 1/6 Sub irrigation for wheat would be too expensive.
1930 Amer. Speech 6 11 Subirrigation is accomplished by allowing water to stand in deep ditches from which it soaks laterally.
1979 R. Adams et al. Dry Lands viii. 116/1 Sub-irrigation..is normally achieved either by creating an artificial water-table just below the ground surface or by burying a drip irrigation system or a network of perforated pipes.
2004 BusinessWeek 31 May gd 8/1 Sub-irrigation serves as a draining outlet so the course is never too wet or too dry.
This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022).
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n.1835