MEASUREMENT OF NITRATE NITROGEN CONCENTRATION IN SOIL BASED ON ABSORPTION SPECTROSCOPY

摘要

PROBLEM TO BE SOLVED: To provide a prompt and economical measurement system for nitrate nitrogen in soil.;SOLUTION: An attenuation spectrum of a mixture of soil and extractant is measured throughout a wavelength range (spectral movement range) including wavelengths close to an absorption peak at 200 nm, and then a nitrate nitrogen concentration in the soil is determined on the basis of the attenuation spectrum.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2016,JPO&INPIT