Development of a nitrate ion-selective electrode based on an Urushi matrix membrane and its application to the direct measurement of nitrate-nitrogen in upland soils

analytical methods andosol andosoles andosols azote calibration contenido de agua en el suelo japan japon measurement mesure nitrate nitrates nitratos nitrogen normalisation soil soil water content sol sol de moyenne altitude standardizing suelo suelo de altura technique analytique temperatura temperature teneur en eau du sol upland soils