#$%^&*AU2009238378B220120209.pdf#####C:\NRFrtbl\DCC\AKW\25MWh 6_l. LXM -l /A121N ABSTRACT OF THE DISCLOSURE A system and method is provided for remotely and automatically calibrating a mass-flow sensor in a yield monitor of a combine. The invention uses a wireless communication device installed on a combine and a remote wireless communication device installed on a grain carrier or truck carrier. Once an actual weight is obtained, calibration information is sent to the combine to calibrate the mass-flow sensor.