Principal component

Model

parameter^†

Components coefficient

Overall model P-value

Overall model R²

RMSE^†

4

BD (g∙cm⁻³)

−3.07

0.014

0.32

9.36

pH

1.26

EC (dS∙m⁻¹)

2.13

P (kg∙ha⁻¹)

0.04

K (kg∙ha⁻¹)

0.01

Ca (kg∙ha⁻¹)

0.01

Mg (kg∙ha⁻¹)

0.03

S (kg∙ha⁻¹)

−0.03

Na (kg∙ha⁻¹)

0.004

Fe (kg∙ha⁻¹)

0.003

Mn (kg∙ha⁻¹)

0.01

Zn (kg∙ha⁻¹)

0.01

TN (kg∙ha⁻¹)

0.003

TC (kg∙ha⁻¹)

−0.0001

SOM (kg∙ha⁻¹)

−0.0001

Intercept

−0.53

Prediction expression 38.41 - 5.45* (Principal 4)