The invention relates to devices for spreading liquid manure, wherein a liquid manure sensor (8) determines the constituents of the liquid manure (G) to be spread and an evaluating unit (10) compares the determined values with predefined constituent data. The quantity of liquid manure (G) to be spread per area unit is calculated based on the result of the comparison. According to the result of the comparison an adjustable valve (6) actuates a distributor device (7) accordingly, by means of which the calculated quantity of liquid manure (G) is spread onto the field.
