Equalizing air pressure on air seeders

An agricultural air seeding system, comprising:

• an agricultural planting implement, including:
• at least one section;
• at least one secondary header removably attached to the at least one section;
• at least one attachment bar attached to the at least one section;
• and
• a plurality of application tools removably attached to the at least one attachment bar and fluidly coupled to the at least one secondary header;
• an agricultural air cart coupled to the agricultural planting implement;
• and
• a pneumatic distribution system fluidly coupled to the agricultural planting implement and the agricultural air cart, the pneumatic distribution system including a plurality of conduits capable of transporting agricultural product, and at least two of the plurality of conduits each have a differing respective length and include at least one flow obstruction such that the plurality of conduits delivers substantially equal air pressure to the plurality of application tools, wherein said at least one flow obstruction of each of said at least two conduits of said plurality of conduits includes at least one of:
• a) a curved section;
• b) internal dimples;
• c) internal dimples and a bifurcation;
• d) an internal component in at least one of the plurality of conduits;
• e) a restriction on a metering manifold of the pneumatic distribution system;
• f) an air flap with rectangular cross-section in the pneumatic distribution system;
• and
• g) an air bleeder on an inside of a bend of at least one of the plurality of conduits.