Dependent variable

Intercept

Variable 1

Variable 2

Variable 3

Variable 4

R²

RMSE

Coeff.

Std. Error

Coeff.

Std. Error

Coeff.

Std. Error

Coeff.

Std. Error

Coeff.

Std. Error

Equation (1)

Mg

66.1

7.6

Ca

0.585

16.4

0.081

0.005

Equation (2)

Zn

1.14

0.3

Cu

DTW > 4 ha

0.232

0.701

0.364

0.051

0.055

0.013

Equation (3)

C

0.26

0.28

Silt

NO₃-N

0.274

0.225

0.048

0.006

−0.040

0.007

Equation (4)

P

−73.7

34.4

Ca

Mn

Sand %

0.535

36.5

0.068

0.013

2.22

0.28

6.2

0.7

Equation (5)

S

238

25

K

pH-H₂O

Ca

0.355

14.1

0.224

0.027

−43.0

5.5

0.024

0.005

Equation (6)

Mn

−35.1

4.6

Ca

Fe

P

0.523

7.73

0.015

0.003

0.111

0.017

0.079

0.012

Equation (7)

Ca

−1727

257

pH-H₂O

P

DTW > 4 ha

0.553

160

513

49

1.76

0.23

−0.182

0.03

Equation (8)

NO₃-N

−0.77

0.68

NH₄-N

DTW > 4 ha

K

0.585

1.61

6.67

0.63

−0.323

0.029

0.029

0.003

Equation (9)

pH-H₂O

4.6

0.1

Ca

S

K

0.554

0.165

0.00058

0.00005

−0.0056

0.0007

0.0022

0.0003

Equation (10)

NH₄-N

0.47

0.05

K

DTW > 4 ha

NO₃-N

0.42

0.149

−0.0016

0.0003

0.020

0.003

0.042

0.004

Equation (11)

Cu

0.449

0.07

Ca

Sand

Fe

P

0.630

0.055

0.00014

0.00002

−0.0097

0.0013

0.00075

0.00002

0.00046

0.0001

Equation (12)

Cs¹³⁷

−3884

474

Silt

K

C

Cu

0.546

332

73.1

10.9

3.0

0.6

472

100

125

26

Equation (13)

Fe

431

44

Cu

Mn

NO₃-N

pH-H₂O

0.421

26.6

12.3

2.1

0.94

0.17

−4.1

0.8

−36.7

8.6

Equation (14)

K

−109

51

pH

NO₃-N

P

NH₄-N

0.42

31.4

38.9

9.6

7.1

1.0

0.24

0.04

−87.4

12.8