The AD-P 303 Special pneumatic seed drill, with its compact design, has been developed for use on medium-sized farms. The seed hopper capacity is 750 l but this can be increased with an extension to 1250 l. The seed drill is mounted onto the rotary harrow by means of a universal coupling triangle. It can also be mounted onto soil preparation implements from other manufacturers. The fan can be operated either via the PTO or hydraulically. The variator, connected to the patented dosing system, allows precision dosing of seed quantities ranging from 2 to 400 kg/ha. The translucent distributor head is located outside the seed hopper enabling the permanent monitoring of the seed flow from the tractor cab. In particular cases, excess seeds are fed to the hopper (e.g. when excluding seeding rows). The external arrangement of all hoses ensures easy cleaning of the hopper. This characteristic is particularly advantageous in the case of seed changes.