Calibration of Passive UHF RFID Tags Using Neural Networks to Measure Soil Moisture

Table 2

Training, validation, and test results for the artificial neural network used to correlate soil volumetric water content with RFID tag signal properties while the soil moisture was rising. MSE: mean square error.

RFID tag depth	ANN training (85% samples per depth)		ANN test (15% samples per depth)
Measure	MSE		MSE
5 cm	6.2e − 04	0.97	2.1e − 03	0.89
10 cm	3.84e − 05	0.99	2.9e − 03	0.78
15 cm	1.52e − 04	0.99	1.9e − 03	0.91