A Novel Portable Soil Water Sensor Based on Temperature Compensation

Table 2

Comparison of temperature compensation effects.

Temperature compensation	Soil samples	Indicators	Soil volumetric water content (%)
			7.50	12.00	18.00	21.00	23.00	26.50
Before compensation	Sandy soil	MAE	1.03	1.04	1.17	0.74	0.47	0.53
		MSE	0.40	0.40	0.46	0.29	0.18	0.21
	Clay loam soil	MAE	1.48	1.45	0.80	0.79	0.84	0.82
		MSE	0.56	0.54	0.31	0.33	0.33	0.33
	Loess soil	MAE	1.37	1.33	1.45	0.96	0.57	0.78
		MSE	0.52	0.51	0.55	0.38	0.23	0.31
After compensation	Sandy soil	MAE	0.54	0.33	0.63	0.24	0.23	0.26
		MSE	0.22	0.13	0.23	0.08	0.10	0.09
	Clay loam soil	MAE	0.11	0.35	0.25	0.65	0.54	0.42
		MSE	0.04	0.13	0.11	0.22	0.19	0.18
	Loess soil	MAE	0.14	0.18	0.58	0.25	0.17	0.44
		MSE	0.06	0.07	0.22	0.10	0.06	0.18