Abstract: A water distribution pipe comprises an elbow formation along its length, an aperture-defining formation defining an aperture in a radially distal wall of the elbow formation along a radius of the curvature of the elbow, and an openable closure that is mounted or mountable to the aperture-defining formation and that closes the aperture.

Abstract: A water distribution pipe comprises an elbow formation along its length, an aperture-defining formation defining an aperture in a radially distal wall of the elbow formation along a radius of the curvature of the elbow, and an openable closure that is mounted or mountable to the aperture-defining formation and that closes the aperture.

Abstract: The invention provides a crop cultivation receptacle. The receptacle comprises a base and side walls that project from the base to define a receptacle space between them. In the receptacle space, a body of growth medium for the cultivation of crops can in use be contained such that a major portion thereof is spaced from the base. The receptacle also comprises at least one recess that is defined in the base. Into the recess, a minor portion of the body of growth medium can extend and in which the minor portion of the body of growth medium can be contained. The receptacle further comprises water feed control means that limits water feed to the receptacle space so as not to exceed a predetermined depth of water in the receptacle space above non-recessed portions of the base.