Configurations of inlet and outlets of air filled auxiliary tank of air seeders

A method of replenishing a supply of a particulate agricultural material in a tank of a pneumatic agricultural material delivery system, by providing an air conveying system for receiving the particulate agricultural material from an agricultural material reservoir and delivering the particulate agricultural material to the tank to replenish the particulate agricultural material in the tank, the method comprising:

• supplying air from an air flow source to the agricultural material reservoir;
• passing the supplied air through a venturi region to create a region of increased air velocity and reduced air pressure for ingesting particulate agricultural material from the agricultural material reservoir and providing a flow of air entrained particulate agricultural material, the venturi region including an inlet and at least one venturi coupled to the air flow source, an inlet for receiving the particulate agricultural material from the agricultural material reservoir, and an outlet for providing the particulate agricultural material from the agricultural material reservoir entrained within air flow from the air flow source;
• operating a three position valve located in the venturi region to move the air entrained particulate agricultural material to the tank, wherein placing the valve in a first position drains particulate agricultural material front the agricultural material reservoir only, placing the valve in a second position drains from both the agricultural material reservoir and the venturi region outlet, and placing the valve in a third position pressurizes the tank and permits the air entrained particulate agricultural material to move through the venture region outlet;
• conveying the air entrained particulate agricultural material through a plurality of supply conduits from the venturi region outlet and delivering the air entrained particulate agricultural material to the tank, each supply conduit extending into the tank;
• releasing the air entrained particulate agricultural material from multiple spaced apart locations within the tank to provide a uniform distribution of the particulate agricultural material within the tank;
• and
• venting excess air from the tank.