Table 7.

Phosphorus desorption constants with different rates of biochar application after 7, 28 and 60 days of aerobic incubation on different days of incubation in sandy 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)	0.053	16.9	0.014	90.9	0.037	71.4
Lucaena (L1)	0.006	250.0	0.01	142.8	0.02	111.1
Lucaena (L2)	0.038	111.1	0.011	166.6	0.017	111.1
Albbizia (A1)	0.01	142.8	0.009	125.0	0.006	166.6
Albbizia (A2)	0.006	200.0	0.0058	166.6	0.008	142.8
Mangifera (M1)	0.0038	333.3	0.011	125.0	0.003	333.3
Mangifera (M1)	0.101	90.9	0.0092	142.0	0.003	250.0
Triticum (T1)	0.0042	250.0	0.0048	200.0	0.014	71.40
Triticum (T2)	0.027	111.1	0.0087	125.0	0.020	13.50
Oryza (O1)	0.0021	500.0	0.0033	333.3	0.008	166.6
Oryza (O2)	0.0019	500.0	0.003	333.3	0.0059	166.6
LSD (p<0.05)	0.011	62.9	NS	50.0	0.013	58.2