The automatic spreading regulation on slurry tankers inludes DPAE (Flow rate proportional to the Electronic advance) with inductive flowmeter Ø 150 mm, protected in the tank : precision of inputs (automatic management of the spread dose/ha with a precision of 5 %), 2 variables to enter: working width and dose/ha, system compatible with precise agriculture, speed sensors (wheels, grinder distributor and compressor), instant display and exportable data (PC, printer).