Table 3.

Langmuir and Freundlich adsorption 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
	Langmuir		Freundlich		Langmuir		Freundlich		Langmuir		Freundlich
	(b) (mg kg−1)	(K) (L kg−1)	(a) (mg kg−1)	(n) (L kg−1)	(b) (mg P kg−1)	(K) (L kg−1)	(a) (mg kg−1)	(n) (L kg−1)	(b) (mg P kg−1)	(K) (L kg−1)	(a) (mg kg−1)	(n) (L kg−1)
Control (CK)	66.6	1.140	5.27	3.42	37	3.220	3.79	2.26	11.3	0.220	4.00	2.61
Lucaena (L1)	31.2	0.065	1.08	1.3	20.8	0.081	1.57	1.46	10	0.190	2.25	1.97
Lucaena (L2)	0.88	0.350	1.75	1.85	22.7	0.070	1.57	1.46	9.43	0.230	2.15	2.04
Albbizia (A1)	18.5	0.122	1.18	1.14	16.6	0.100	3.37	1.53	8.19	0.250	2.44	2.04
Albbizia (A2)	11.2	0.290	1.58	1.52	2.11	0.376	1.79	1.35	11.2	0.160	2.15	1.86
Mangifera (M1)	3.90	0.314	3.37	2.73	2.77	0.493	3.1	2.12	9.43	0.210	2.25	1.86
Mangifera (M1)	1.15	0.310	3.37	2.2	1.98	0.361	3.38	2.29	2.93	0.580	3.13	2.24
Triticum (T1)	0.47	0.228	4.62	3.01	15.6	0.090	2.09	1.72	7.93	0.280	2.47	2.1
Triticum (T2)	0.38	0.253	1.42	1.36	3.2	0.990	3.35	2.22	4.65	1.140	3.06	2.2
Oryza (O1)	37.0	0.342	3.2	2.31	28.5	0.628	1.27	1.38	11.9	0.100	2.47	1.87
Oryza (O2)	66.6	1.140	5.27	3.42	37	3.220	3.79	2.26	11.3	0.220	4.00	2.61
LSD (p<0.05)	31.2	0.065	1.08	1.3	20.8	0.081	1.57	1.46	10	0.190	2.25	1.97