Doses of P (kg/ha)

Doses of Ca (kg/ha)

Doses of Mg (cmol/kg)

RDG correlation coefficients

DSP

Ca/Mg

Al

Fe

25

0

0

0.99*

−0.07ns

−0.3 ns

0.52ns

25

0.94ns

−0.13ns

−0.34ns

0.63ns

50

0.96ns

−0.07ns

−0.35ns

0.54ns

75

0.61ns

0.10ns

−0.32ns

0.52ns

25

0

0.75ns

−0.10ns

−0.94ns

0.63ns

25

0.99*

0.52ns

−0.94ns

0.99*

50

0.96ns

−0.11ns

−0.97ns

0.82ns

75

0.92ns

−0.03ns

−0.97ns

0.85ns

50

0

0.84ns

−0.06ns

−0.93ns

0.62ns

25

−0.66ns

0.99*

−0.07ns

0.77ns

50

−0.50ns

0.99ns

−0.30ns

0.90ns

75

0.75ns

−0.07ns

−0.99ns

0.66ns

75

0

0.98ns

−0.39ns

−0.98ns

0.58ns

25

0.89ns

−0.35ns

−0.99*

0.79ns

50

0.80ns

−0.28ns

−0.99*

0.81ns

75

0.88ns

0.07ns

−0.99*

0.84ns