Analysis of the Accuracy of an FDR Sensor in Soil Moisture Measurement under Laboratory and Field Conditions

Table 4

Goodness-of-fit test for soil water content (% vol) between the Insentek and oven-drying methods.

Treatments		Linear regression equation	Average SWC (% vol)		Goodness-of-fit
			Insentek	Oven-drying	RMSE	RPD
Irrigation amount (mm)	30		24.7	23.8	1.436	1.56	0.778	0.01
	45		26.2	25.3	1.930	1.93	0.784	0.01
	60		25.2	24.8	0.977	4.04	0.912	0.001

Note: is soil water content (SWC, % vol) of Insentek method; is SWC of oven-drying method; RMSE is root mean square error (% vol); RPD is relative prediction deviation; is coefficient of determination; and is probability.