The accuracy of yield monitors is a hot topic.
Loads are usually the amount of grain in a combine hopper or on a truck or wagon.
Even now most methods of calibration depend on loads by comparing the amount reported by the yield monitor for some reasonably large area with some type of scale. Research has shown that it is extremely important to calibrate the yield monitor under the conditions in which it will be used. One of the ways that yield monitors would be helpful is by measuring the amount of grain harvested from test plots. We used a combine equipped with both scales and a yield monitor to harvest an experimental field with 60 plots that had combinations of tillage and herbicide treatments. The plots were 300 feet in length and five 30-inch rows in width.