Parameter

Coefficient

Std. Error

Z

P > z

SOM

0.75

0.03

23.18

0.000^**

pH

−0.11

0.10

−1.12

0.264

Si

0.03

0.05

0.52

0.603

Cl

0.01

0.03

0.17

0.868

tt

−0.01

0.02

−0.51

0.609

Intercept

−2.52

0.27

−9.26

0.000^**

R-sq (overall) = 0.7864

Wald chi square (5) = 635.04.21 Prob > chi square = 0.0000

Rho = 0.246

Hausman test: chi square (5) = 1.02 Prob > chi square = 0.9607