| 摘要 |
<p>Apparatus for use in the control of the irrigation of an area of land or other terrain, comprising a pressure sensor (8) which is connectable operably to means for irrigating such an area, which is capable of being located within the material of the area below the surface thereof and which, when so located, is arranged to control operation of the irrigation means in dependence upon the pressure exerted upon the sensor (8) resulting from a condition, such as the water content, of the material in the vicinity of the sensor (8). Preferably, the apparatus includes means (9) arranged to disturb, in the region of the pressure sensor (8), the material of the area of land of other terrain those irrigation is to be controlled. The invention also provides an irrigation system incorporating the inventive apparatus, as well as an associated method. <IMAGE></p> |
