Anhydrous Ammonia Application Rate Errors

Abstract

The application rates of 61 anhydrous ammonia applicators were measured to determine their application accuracy. Thirty percent of the operators underapplied anhydrous ammonia while 34% overapplied. The principle distinction between applicators was the use of controllers or regulators. The application rate errors of 17 controllers and 44 regulators were significantly different. Fifty-nine percent of the controllers and 27% of the regulators had acceptable application rate errors. Thus, it was concluded that controllers were more accurate than regulators.