| 摘要 |
A liquid delivery apparatus is disclosed which includes a frame supporting a drum. The frame is adapted for displacement relative to a ground surface (3) having plant matter (4,5,6) and the drum is rotatably disposed relative to t he frame at a rest position (H2) having a height above said ground surface whic h allows for engagement of an outer circumferential surface (9) of the drum wi th at least some of said plant matter (4,5). The apparatus has at least one applicator for application of a liquid onto the circumferential surface such that the liquid is transferable to at least some of the plant matter as the frame is displaced relative to said ground surface. Preferably, the drum is retractably mounted to the frame such that the drum retracts from the rest position upon engagement with a ground obstacle (17) and returns to the rest position subsequent to engagement with the ground obstacle. Another embodime nt includes at least one applicator for application of a liquid onto the circumferential surface, the applicator providing a variable liquid application profile along a length of the outer circumferential surface. Yet another embodiment discloses a saturation sensor for determining the degree of saturation of liquid on the circumferential surface of the drum, the saturation sensor providing a measurement of the weight of the drum.
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