Nondestructive Detection of Moisture Content in Walnut Kernel by Near-Infrared Diffuse Reflectance Spectroscopy

Table 1

The moisture content of walnut kernel samples.

Subsets	Sample number	Moisture content (%)	Mean (%)	Standard deviation^a
Calibration set	102	1.20–9.92	5.57	0.26
Prediction set	34	1.43–9.43	5.52	0.27
Total samples	136	1.20–9.92	5.55	0.27

^aThe standard deviation refers to the spread of the individual samples.