| 释义 |
underˈdrain, v.
[under-1 4 a.]
trans. To drain by means of underground trenches.
1805[implied at underdraining below]. 1832Scoreby Farm Rep. 13 in Husb. III (L.U.K.), The land was..completely underdrained with tiles. 1898Yearbk. U.S. Dept. Agric. 318 If it is not underdrained in all wet spots, [surface draining] should be the first work done.
Hence underˈdrainer; underˈdraining vbl. n.
1805R. W. Dickson Pract. Agric. I. 13 Those clayey soils where water stagnates on the surface of the ground, and..cannot be removed by the more general modes of under⁓draining. 1832Scoreby Farm Rep. 25 in Husb. III (L.U.K.), The great enemy to underdrainers, the mole. 1879Harper's Mag. June 135/2 Other minor improvements have been made, such as the under-draining of a low tract. 1969G. E. Evans Farm & Village ii. 27 This is under-draining, sometimes called thorough-draining, the technique by which a hollow drain is made under the soil into which excess water can soak and be taken off. |