Phosphorus Sorption Kinetics in Reclaimed Lignite Mine Soils under Different Age Stands of Robinia pseudoacacia L. in Northeast Germany

Table 6

Coefficient of determination () for the kinetics equations of the measured P (de)sorption at the 0–3, 3–10, and 10–30 cm soil layers under 2 (R2), 3 (R3), 4 (R4), and 14 (R14) years old Robinia pseudoacacia plantations.

Study site	Coefficient of determination—
	Sorption			Desorption
	Elovich	Parabolic	Exponential	Elovich	Parabolic	Exponential
			0–3 cm
R2	0.97	0.83	0.96	0.98	0.85	0.94
R3	0.92	0.71	0.9	0.99	0.91	0.98
R4	0.95	0.84	0.94	0.99	0.93	0.97
R14	0.98	0.83	0.98	0.99	0.96	0.98
			3–10 cm
R2	0.97	0.83	0.97	0.99	0.88	0.95
R3	0.94	0.82	0.93	0.98	0.94	0.98
R4	0.91	0.69	0.89	0.99	0.95	0.97
R14	0.85	0.59	0.82	0.99	0.96	0.98
			10–30 cm
R2	0.97	0.88	0.96	0.99	0.91	0.98
R3	0.93	0.75	0.87	0.99	0.87	0.95
R4	0.96	0.82	0.95	0.99	0.91	0.96
R14	0.92	0.71	0.92	0.99	0.94	0.96