There is provided a liquid measurement and control apparatus (101) for measuring and controlling a level of liquid in an environment including plants or animals, the apparatus including: a first chamber (103) including a first liquid port (105) for liquid connection to the environment; a second chamber (107) integrally formed with the first chamber and including a second liquid port (109) for liquid connection to the environment; a level sensor (111) for measuring a first level of liquid in the first chamber; and an adjuster (113, 115, 117, 119, 121) for adjusting a second level of liquid in the second chamber, wherein, in use, flow of liquid between the first and second chambers within the apparatus is prevented such that the first level of liquid is representative of the level of liquid in the environment and the second level of liquid is adjustable to control the level of liquid in the environment.