Agricultural vehicle pneumatic distribution system

1 AGRICULTURAL VEHICLE AIR DISTRIBUTION SYSTEM 3 A pneumatic distribution system for pneumatically distributing material in an agricultural 4 vehicle is described. In one example, the pneumatic distribution system comprises an air source 5 having an outlet with different air pressures defining a pressure gradient across the outlet, and a 6 plurality of inlet ports configured to receive air from the outlet for a plurality of distribution 7 streams, comprising at least a first distribution stream with a first pressure loss value and a 8 second distribution stream with a second pressure loss value that is greater than the first pressure 9 loss value. The inlet ports for the first and second distribution streams are located relative to the .0 pressure gradient such that the second distribution stream receives a higher air pressure than the .1 first distribution stream.