Online Measurement of Soil Organic Carbon as Correlated with Wheat Normalised Difference Vegetation Index in a Vertisol Field

Table 2

Sample statistics of laboratory and online measured SOC (%) of the calibration and independent validation sets.

Karacabey field	Sample number	Min, %	Max, %	Mean, %	SD, %
All field samples	92	0.81	1.93	1.41	0.22
Cross-validation set	391	0.79	2.64	1.41	0.31
Laboratory validation set	25	0.98	1.66	1.44	0.17
Online validation set	25	0.85	2.01	1.29	0.28

SD = standard deviation.