Abstract: An irrigation conduit for sub ground irrigation, methods for fabrication the conduit and irrigation systems comprising the same. The irrigation conduit comprises one or more elongated water-impermeable plastic strips joined to form a sleeve, wherein at least one of the strips comprises a plurality of water transmitting ceramic windows spaced along its length. The water transmitting ceramic windows are having an internal structure comprising vacuoles and a network of channels connecting between the vacuoles.

Abstract: A harvesting device for harvesting cotton or similar crop plants comprising: a housing mountable on a vehicle or a cart and adapted to be advanced along a row of the plants and provided with a gap through which each plant may pass through as the housing is advanced; two substantially parallel elongated revolvable bar assemblies placed in housing, each consisting of at least one spiral bar rotatable about a first axis, the first axis revolvable about a second axis, whereby when the device is advanced along a row of plants and the revolvable bar assemblies are rotated the spiral bars impart a plant as it passes through the gap in the housing a series of lashes that cause separation of cotton bolls from the plant and their conveying and collection.