This applies to virtually every aspect of agriculture, from planting to harvest.
Yield monitoring uses sensors to measure the force of grain flow through the combine.
Instantaneous readouts are generated which measure yield, moisture and speed, as well as totals by the bushel and by the acre. With yield monitoring, you can measure variation within a single field. Another example is precision spraying. With precision spraying, you can control flow in the field. With GPS, you can further identify and track crop patterns.