Self propelled agricultural application machine

A self-propelled agricultural application machine comprising:

• a chassis comprising a central longitudinal beam from which are suspended a pair of front wheels and a pair of rear wheels;
• a storage tank containing material to be applied mounted on the chassis, wherein the storage tank is positioned on the chassis so that it extends on both sides of the central longitudinal beam but is asymmetric about a longitudinal vertical plane along the centre of the chassis such that a volume of the storage tank disposed to one side of the plane is greater than a volume of the storage tank disposed to the other side, and wherein said storage tank has a downwardly-extending portion on the one side of the longitudinal vertical plane with the greater volume without a corresponding downwardly-extending portion on said other side of the plane, said downwardly-extending portion being a lowest part of the storage tank and a last part of the storage tank to empty during application of the material by the agricultural application machine;
• and
• an engine which is disposed transversely offset to one side of the longitudinal beam and longitudinally positioned between said front wheels and said rear wheels, wherein the engine comprises an output drive shaft which is transversely orientated and connected to hydraulic pumps which are positioned on an opposite side of the longitudinal beam between the front wheels and the rear wheels, wherein the downwardly-extending portion of the storage tank is disposed on the side of the longitudinal beam opposite the engine to counterbalance a weight of the engine.