Agricultural systems having stalk sensors and data visualization systems and related devices and methods

An agricultural data visualization system for use on a corn head comprising one or more row units, the data visualization system comprising:

• (a) one or more sensors disposed on the one or more row units, each of the one or more sensors configured to sense stalks passing through the corn head;
• (b) a GPS receiver in association with the corn head configured to detect a location of the corn head during harvest operations;
• (c) a display in communication with the one or more sensors and the GPS receiver;
• and
• (d) a storage system comprising as-planted spatial information in communication with the display,
• wherein the display is configured to correlate the as-planted spatial information with the location of the corn head during harvest operations, wherein each of the one or more row units is correlated to a planter row unit on the basis of the as-planted spatial information, and wherein correlation of the one or more row units and the planter row unit is reset for every harvester pass.