Agriculture Reference
In-Depth Information
TABLE 2:
Soil properties measured at the 13 organic tomato fields in Yolo County, California, USA in the 0-15 cm surface layer (se =
standard error).
Field
Total C (g kg
−1
)
Total N (g kg
−1
)
C:N
pH
Clay (%)
Silt (%)
Sand (%)
Soil texture
Mean
se
Mean
se
Mean
se
Mean
se
Mean
se
Mean
se
Mean
se
1
6.7
0.17
0.8
0.03
8.2
0.16
6.7
0.11
13.9
0.80
47.1
2.77
39.1
3.57
Loam
2
9.6
0.23
1.2
0.02
8.3
0.08
6.8
0.10
21.4
0.27
59.3
0.36
19.3
0.56
Silt loam
3
10.7
0.17
1.3
0.03
8.2
0.07
6.7
0.08
19.4
0.12
55.6
0.45
25.1
0.40
Silt loam
4
11.1
0.22
1.4
0.03
8.1
0.09
6.6
0.06
17.6
0.36
61.4
1.30
21.0
1.35
Silt loam
5
11.2
0.22
1.4
0.03
8.1
0.06
6.3
0.06
18.1
0.45
60.1
0.67
21.9
1.04
Silt loam
6
12.5
0.53
1.4
0.07
9.2
0.14
6.3
0.04
16.2
0.19
63.5
0.45
20.3
0.52
Silt loam
7
12.8
0.52
1.4
0.05
9.0
0.10
7.2
0.04
14.6
0.29
52.1
0.59
33.3
0.86
Silt loam
8
13.2
0.38
1.5
0.04
9.0
0.07
6.8
0.02
9.7
0.21
48.4
0.43
41.9
0.49
Loam
9
13.9
0.24
1.6
0.03
9.0
0.15
6.4
0.04
14.0
0.06
58.1
0.26
27.8
0.31
Silt loam
10
16.5
0.33
1.7
0.04
9.7
0.24
6.6
0.06
15.7
0.16
63.8
0.48
20.6
0.62
Silt loam
11
17.1
0.48
1.8
0.04
9.8
0.12
6.9
0.04
17.5
0.16
67.3
0.34
15.3
0.45
Silt loam
12
18.1
0.76
2.0
0.08
9.3
0.05
6.8
0.04
11.2
0.21
47.8
0.40
41.0
0.52
Loam
13
20.0
0.56
2.1
0.05
9.7
0.10
6.5
0.04
16.4
0.38
66.4
1.15
17.3
1.41
Silt loam
Mean
13.3
1.5
8.9
6.7
15.8
57.7
26.4
CV
28.0
22.1
7.2
3.7
20.2
12.2
35.3
