title: Rapid determination of nitrate nitrogen in soils.
abstract: A simple but effective method for pretreatment of soil samples is suggested. The application of an electrodynamic vibrator or ultrasonic device eliminates the necessity for continuous stirring in direct potentiometric determination of nitrate nitrogen. It also makes the extraction process faster, and the apparatus could easily be used in automatic systems for continuous soil control.
authors.affiliation: Department of Physics and Biophysics, Medical Institute, Sofia, Bulgaria.
authors.forename: V
authors.initials: V
authors.lastname: Simeonov
authors.forename: I
authors.initials: I
authors.lastname: Asenov
authors.forename: V
authors.initials: V
authors.lastname: Diadov