A mobile air cart includes a metering assembly configured to receiveparticulatefrom a tank and to deliver particulate to pneumatic conveying lines. Themetering assemblyincludes wall structure that defines a unitary, common metering chamber. Themeteringassembly further includes a plurality of meter units. The meter units areconfigured to meter andseparate particulate within the chamber into respective particulate flowscorresponding to theconveying lines.