NOVELTY - The aeration and extraction assembly comprises a tank (115) for holding a predetermined amount of liquid, a blower for moving air at a selected rate, an extractor head connected to the blower, and an extraction assembly having a top portion, a bottom portion and an extraction aerator (165) connectable to the extractor head and extending to the bottom portion and opening into the bottom portion. The top portion defines a mixing region. The bottom portion is submergible in the predetermined amount of liquid and has a filter (180) with holes sized of 250-841 microns.    USE - The aeration and extraction assembly is useful for producing compost tea.    ADVANTAGE - The aeration and extraction assembly is easy to clean, and effectively and economically obtains large quantities of compost tea with high yield.    DETAILED DESCRIPTION - The aeration and extraction assembly comprises a tank (115) for holding a predetermined amount of liquid, a blower for moving air at a selected rate, an extractor head connected to the blower, and an extraction assembly having a top portion, a bottom portion and an extraction aerator (165) connectable to the extractor head and extending to the bottom portion and opening into the bottom portion. The top portion defines a mixing region. The bottom portion is submergible in the predetermined amount of liquid and has a filter (180) with holes sized of 250-841 microns. A selected amount of contents has particle sizes larger and smaller than the size of the holes of the filter contained in the bottom portion. The blower causes air to exit the extraction aerator in the bottom portion of the extraction assembly causing the contents, the liquid and air to mix in the bottom portion and vigorously mix in the top portion. The air exiting the filter forms a current causing some of the liquid and particles having a size smaller than the size of the holes to exit the extraction assembly through the filter. The top portion has a dome (170) having a lip. The filter is a mesh bag that is removeably connected to the dome and clamped onto the dome above the lip. The extraction aerator extends through the dome to the bottom portion of the extraction assembly. The aeration assembly further comprises a base aerator (150) for aerating the liquid in the tank. The extractor head has a yoke, a first end and a second end. The extraction aerator has a top, which is removeably connected to the yoke of the extractor head. The tank has a volume of 250 gallons, and has a bottom. The extraction assembly has a volume of 4 gallons. The extraction aerator has an aeration rate of 8 cubic feet of air per minute. An INDEPENDENT CLAIM is included for a method of producing compost tea.    DESCRIPTION OF DRAWING(S) - The diagram shows a perspective view of an aeration and extraction assembly.    Tank (115)    Base aerator (150)    Extraction aerator (165)    Dome (170)    Filter. (180)