A pneumatic distribution system for pneumatically distributing material in anagriculturalvehicle is described. In one example, the pneumatic distribution systemcomprises an air sourcehaving an outlet with different air pressures defining a pressure gradientacross the outlet, and aplurality of inlet ports configured to receive air from the outlet for aplurality of distributionstreams, comprising at least a first distribution stream with a first pressureloss value and a seconddistribution stream with a second pressure loss value that is greater than thefirst pressure lossvalue. The inlet ports for the first and second distribution streams arelocated relative to thepressure gradient such that the second distribution stream receives a higherair pressure than thefirst distribution stream.
