0 past simple and past participle of leach
1 When a chemical substance leaches or is leached from a material, especially soil, it is removed by the action of water passing through the material:
Under such conditions, nitrate can be leached and can contaminate the shallow aquifer which is also a source of drinking water.
The data may suggest that growing lowland rice during the wet season could reduce the amount of nitrate leached to the shallow aquifer.
The iron oxide presumably gets leached out from the surface of the cultivated land.
The soil was then leached with 95 % ethanol to remove free salts, air-dried and passed through a 2-mm sieve.
Denitrification of leached nitrate accounted for 26-35% of nitrous oxide emissions.
Using artificial neural networks and regression to predict percentage of applied nitrogen leached under turfgrass.
Analysis of anions leached from rock samples suggests that subsurface pyrite weathering is centered at two zones within the ore body.
Table 1 shows the total amounts leached in about 20 pore volumes.
