Analysis of the Accuracy of an FDR Sensor in Soil Moisture Measurement under Laboratory and Field Conditions
Table 3
Infiltration area (cm d) within the 0–50 cm soil depth converted using pixel area.
Treatments
Irrigation quota (mm)
Range of SWC (% vol)
Pixel area within 0–50 cm depth
Percent of total pixel area (%)
Infiltration depth (cm)
Duration after irrigation (d)
Infiltration area within 0–50 cm depth (cm d)
Maximum value
0–36
10
100
50
7.0
350
Insentek method
30
32–36
0.68
6.8
18
4.3
24
28–32
1.63
16.3
21
5.8
57
24–28
4.61
46.1
43
7.0
161
45
32–36
0.65
6.5
31
1.7
23
28–32
3.31
33.1
38
5.8
116
24–28
3.69
36.9
48
7.0
129
60
32–36
0.71
7.1
36
1.8
25
28–32
4.47
44.7
42
7.0
156
24–28
2.06
20.6
50
7.0
72
Oven-drying method
30
32–36
0.019
1.9
12
0.4
6.7
28–32
1.04
10.4
19
2.7
36
24–28
4.28
42.8
39
7.0
150
45
32–36
0.41
4.1
25
1.1
14
28–32
2.05
20.5
33
3.3
72
24–28
4.17
41.7
45
6.9
146
60
32–36
0.23
2.3
26
0.6
8
28–32
3.98
39.8
41
5.6
139
24–28
3.81
38.1
50
7.0
133
Note: maximum infiltration depth is 50 cm under the three irrigation treatments. Pixel area is calculated using the software ImageJ (NIH, Maryland, USA). Infiltration area is the product of infiltration depth (cm) and duration after irrigation (d).
