Hydroponic growing systems comprised of light emitting diode (LED) plant grow lights, grow cabinets in the nature of closed environments with integrated misting chambers, and automated controls therefor; Hydroponic grow boxes comprised of plant grow lights and also including lights, exhaust system, hydroponics growing container and odor control system, sold as a unit; Hydroponic growing systems comprised of light emitting diode (LED) plant grow lights, grow cabinets in the nature of closed environments with integrated water delivery chambers, and automated controls therefor; Water treatment apparatus for infusing irrigation water with liquid fertilizer; Watering machines for agricultural purposes; Agricultural irrigation units