Boron Characterization, Distribution in Particle-Size Fractions, and Its Adsorption-Desorption Process in a Semiarid Tunisian Soil

Table 2

Freundlich adsorption and desorption coefficients and desorption index of the studied soil.

Depth (cm)	Horizons		Freundlich adsorption				Freundlich desorption				DI
					K	R^2	1/n′	n′	K′	R^2
0–25	Ap	7.67	0.70	1.42	0.88	0.82	0.61	1.62	0.84	0.73	1.13
25–50	A/C	7.75	0.43	2.31	4.79	0.79	0.70	1.42	1.09	0.92	0.61
50–75	C1	7.70	0.73	1.36	1.61	0.88	1.03	0.96	0.37	0.97	0.70
75–100	C2	7.72	0.64	1.54	2.02	0.72	0.80	1.24	0.68	0.91	0.80

R²: regression coefficient; DI: desorption index.