A distributed metering system and method for metering liquid anhydrous ammoniaisdisclosed. The distributed metering system can comprise a plurality ofapplicator devices coupledto a plurality of metering units, and an electronic control unit coupled tothe plurality of meteringunits. The electronic control unit is configured to control an applicationrate of a crop inputmaterial supplied from the plurality of metering units by adjusting anoperating parameter of acomponent of each of the plurality of metering units when the application rateexceeds or fallsbelow a predetermined threshold.
