In one aspect, a system for the continuous production of liquid fertilizer is provided. The system includes a compost feed source, an extractor to produce liquid fertilizer from compost of the compost feed source, and a discharge area. The compost is fed to the extractor by a conveyor. The extractor may have a continuous belt configured to revolve about a roller. The belt is driven by a drive source such as a motor. This belt has a plurality of apertures in its surface that allow water to pass through the belt. Water sources are positioned above the belt and are configured to provide water to the belt and any compost positioned on top of the belt. The water may then collect nutrients, biologics, and other materials from the compost, and pass through the belt. A collection area is positioned to collect the water (which is now a liquid fertilizer by virtue of its collection of components from the compost). A discharge receptacle is positioned at an end of the belt to receive the spent compost after it has been wetted and nutrients extracted.