Abstract: A self-driven chopper-harvester for experimental plots of ground of reduced size, intended especially for collecting fodder plants, comprises a collecting and chopping device forming a first module to which is connected via an ejection duct to a second module comprising an automatic weighing and sampling assembly.

Abstract: A seed-sowing element intended to be mounted on a drill of the pneumatic type having a turbine, a general low pressure conduit circuit and a seed-sowing element, with the seed-sowing element comprising a low pressure assembly for recovering excess seeds including a first flap inserted in a low pressure conduit connected to a supply chamber for a disk, a second flap between the outlet of a hopper and the supply chamber, and a third flap positioned in a suction cover adjacent to the disk, the flaps being connected to an operating-cycle control assembly, itself controlled by a datum point set up on the ground and marking the plots to be sown.