Table 6.

Phosphorus desorption constants with different rates of biochar application after 7, 28 and 60 days of aerobic incubation on different days of incubation in clay loam soils.

Treatment	After 7th days		After 28th days		After 60th days
	Desorption maxima (Dm) (mg P kg−1)	Desorption constant (kd) (L kg−1)	Desorption maxima (Dm) (mg P kg−1)	Desorption constant (kd) (L kg−1)	Desorption maxima (Dm) (mg P kg−1)	Desorption constant (kd) (L kg−1)
Control (CK)	0.009	200.0	0.008	200.0	0.0026	500.0
Lucaena (L1)	0.041	100.0	0.007	166.7	0.0047	250.0
Lucaena (L2)	0.035	21.3	0.043	71.4	0.0066	200.0
Albbizia (A1)	0.004	500.0	0.009	200.0	0.0059	250.0
Albbizia (A2)	0.062	38.5	0.042	25.0	0.0211	111.1
Mangifera (M1)	0.020	8.5	0.068	34.5	0.0037	333.3
Mangifera (M1)	0.045	27.8	0.043	21.7	0.016	90.9
Triticum (T1)	0.020	6.6	0.008	166.7	0.0054	250.0
Triticum (T2)	0.012	1.4	0.033	20.0	0.0084	111.1
Oryza (O1)	0.077	25.0	0.005	333.3	0.0021	500.0
Oryza (O2)	0.012	200.0	0.004	333.3	0.0043	333.3
LSD (p<0.05)	0.018	25.8	0.013	30.9	0.04	56.1