A method and system of tracking transported grain. A radio-frequency identification (RFID) tag is provided for being deposited in a container with the grain. The tag is dimensioned to approximate a size of an individual grain, and comprises a memory and RF communication channel. The RFID tag further comprises data stored in the memory, the data including at least a time when the RFID tag was handled with surrounding grain, and information sufficient to determine a location of handling at the time the RFID tag was handled with the surrounding grain.