NOVELTY - Manufacturing a liquid fertilizer comprises supplying organic waste to a fermenter (5) rotatable on axis (15) in a predetermined direction, continuously or intermittently.    USE - The method is used for manufacturing liquid soil improving fertilizer from organic waste of the drink-industry, stock raising waste, agricultural waste, fishery, from the city, food processing industry and kitchen residue.    ADVANTAGE - Organic waste can be efficiently decomposed without using new/non-decomposed organic waste to produce liquid fertilizer, as decomposed product is extracted during the process. The obtained liquid fertilizer contains balanced nutrients such as a trace amount of metal salt such as a nitrogen compound, bacteria, or a water soluble inorganic decomposition product such as ammonia, nitric acid, phosphoric acid or potassium. Transportation, storage and fertilization can be performed easily. Constructions for dumping the organic waste and process fields for processing waste are eliminated.    DETAILED DESCRIPTION - Manufacturing a liquid fertilizer comprises supplying organic waste to a fermenter (5) rotatable on axis (15) in a predetermined direction, continuously or intermittently. The organic waste is biodegraded to decomposed inorganic product by bacteria. Water is superfluously supplied to the organic waste. The water soluble decomposed inorganic product is extracted from organic waste to obtain liquid fertilizer.    INDEPENDENT CLAIMS are also included for the following:    (i) liquid fertilizer manufacturing apparatus (1) comprising a heat retention tank (3) equipped with a horizontally mounted-rotatable fermenter, driving motor (23) and pipe (37), where the fermenter contains bacteria and performs biodegradation of organic waste to a decomposed inorganic product, the fermenter is rotated in a predetermined direction, water is sprinkled through the pipe for extracting the water soluble decomposed inorganic product, and the obtained extract is ejected out through an outlet (44); and    (ii) a vehicle for liquid fertilizer production, mounted with liquid fertilizer manufacturing apparatus.    DESCRIPTION OF DRAWING(S) - The figure shows a sectional drawing of the liquid fertilizer manufacturing apparatus.    Liquid fertilizer manufacturing apparatus (1)    Heat retention tank (3)    Fermenter (5)    Storage tanks (12)    Surrounding wall (14)    Rotation axis (15)    Drive motor (23)    Water sprinkling pipe (37)    Liquid fertilizer extracting opening (44)