Abstract: The present invention constitutes an improved subsurface irrigation and drainage apparatus and system for its use that includes at least one main pipe or line arranged to receive a water flow therein that can include a water born fertilizer and, optionally, the main pipe or line can incorporate a fan or like arrangement for injecting an air-flow therein and, as required, an airborn fertilizer. The main line preferably includes spaced cross-pieces that are joined to lateral lines or laterals and may incorporate sleeves therewith, which main line, laterals, and sleeves may contain weirs for maintaining a desired water head therebehind as appropriate, and may include slots, holes or like openings formed therein above and/or below a water line therein.