Table 5.

Phosphorus desorption constants with different rates of biochar application after 7, 28 and 60 days of aerobic incubation on different days of incubation in silt 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)	0.004	250	0.031	66.6	0.005	166.7
Lucaena (L1)	0.006	250	0.354	58.8	0.026	50.0
Lucaena (L2)	0.706	83	0.017	15.3	0.006	142.9
Albbizia (A1)	0.004	250	0.010	125.0	0.003	166.7
Albbizia (A2)	0.003	333.3	0.015	76.9	0.006	100.0
Mangifera (M1)	0.142	45.4	0.015	55.5	0.009	66.7
Mangifera (M1)	0.110	55.5	0.021	23.8	0.014	52.6
Triticum (T1)	0.023	90.9	0.012	142.8	0.023	41.7
Triticum (T2)	0.020	40.0	0.062	62.5	0.051	16.1
Oryza (O1)	0.005	200.0	0.198	38.4	0.013	66.7
Oryza (O2)	0.010	142.8	0.009	142.8	0.003	166.7
LSD (p<0.05)	0.028	20.3	0.019	23.0	0.011	25.6