| 摘要 |
<p>1. Method for the controlled irrigation of an area of land, wherein the land is irrigated by means of porous tubes (2) which are substantially parallel and which are buried in the soil, characterised in that gaps (3) are provided between the parallel porous tubes (2), which gaps penetrate from soil level to beneath the level of the porous tubes (2), and the said gaps (3) are filled with substances (4) of a sufficiently large granulometry to impede the suction effect which is naturally offered by the soil.</p> |
