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Ecological Processes

Table 1 Statistical summary of the SPA analyzed using conventional laboratory methods

From: Determination of soil physicochemical attributes in farming sites through visible, near-infrared diffuse reflectance spectroscopy and PLSR modeling

Soil attributes

Min

Max

Mean

Std. deviation

SOC (g kg−1)

0.12

0.16

0.13

0.72

N (mg kg−1)

212.23

250.88

226.66

14.98

SOM (g kg−1)

9.12

134.87

50.46

39.09

pH values

7.14

8.42

7.95

0.35

EC (d Sm−1)

0.25

0.46

0.36

0.07

P (mg kg−1)

21.27

81.29

37.41

15.26

K (mg kg−1)

773.12

3308.94

1937.06

800.12

Fe (mg kg−1)

0.926

2.994

1.85

0.89

Sand (g kg−1)

89

765

360

230.37

Silt (g kg−1)

97

876

388.06

236.11

Clay (g kg−1)

109

398

193

77.63

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