A distributed metering system and method for metering liquid anhydrous ammonia is disclosed. The distributed metering system can comprise a plurality of applicator devices coupled to a plurality of metering units, and an electronic control unit coupled to the plurality of metering units. The electronic control unit is configured to control an application rate of a crop input material supplied from the plurality of metering units by adjusting an operating parameter of a component of each of the plurality of metering units when the application rate exceeds or falls below a predetermined threshold.
