The liquid fertilizer made by the present invention can be sprayed over crops, or over turf or ornamental plants, or used prior to planting, or it can be dispensed through an irrigation system. In a particular embodiment, the system may be present on site at a farm location, and the extraction system collector that receives the liquid fertilizer may be in direct connection to a local irrigation system such as an agricultural irrigation system. In another embodiment, the liquid fertilizer may be created, and then transported to another location for use. The present invention therefore has a primary object of providing a system and method for making liquid fertilizer in the form of liquid compost or compost tea.