CLASSIFYING METHOD FOR GRANULAR FERTILIZER AND CLASSIFYING EQUIPMENT FOR GRANULAR FERTILIZER

摘要

PROBLEM TO BE SOLVED: To provide a classifying method for granular fertilizers capable of extremely rapidly, accurately and easily evaluating and classifying the quality and function of the granular fertilizer and an apparatus for manufacturing the granular fertilizers. SOLUTION: The granular fertilizers are irradiated with electromagnetic waves of different wavelengths, the reflection or absorption spectral values are measured and the granular fertilizers are classified by the spectral values thereof. The apparatus for classifying has an electromagnetic wave irradiation means for irradiating the granular fertilizers with the electromagnetic waves of the different wavelengths, a measuring means for measuring the reflection or absorption spectral values of the electromagnetic waves of the granular fertilizers and a classifying means for classifying the granular fertilizers by the measured spectral values.