Soil Characteristics and Pedoclimatic Evaluation of Rainfed Sorghum (Sorghum bicolor (L.) Moench) in the Mayo-Lemié Division, South-Western Chad

Table 2

Chemical composition of the studied soils.

Profile	Depth (cm)	SiO2%	Al2O3%	Fe2O3%	K2O%	Na2O%	CaO%	MgO%	P2O5%	SO3%	LOI%	Total
M3	0–26	76.07	6.27	2.64	3.05	0.47	0.83	0.20	0.03	0.05	10.37	99.98	9.83	0.49
	26–156	58.45	7.76	5.73	4.24	1.10	9.40	0.62	0.00	0.22	10.68	98.20	6.10	0.55
	156–186	63.94	12.22	6.01	1.60	0.21	0.83	0.14	0.02	0.07	14.46	99.50	4.24	0.13
M2	0–10	79.80	7.86	3.18	2.75	0.43	0.54	0.21	0.01	0.06	4.06	98.90	8.22	0.35
	10–30	57.77	8.18	5.87	4.10	0.82	4.46	0.44	0.03	0.10	17.98	99.75	5.72	0.50
	30–75	66.37	11.65	5.33	2.70	0.53	0.72	0.35	0.02	0.06	11.31	99.05	4.61	0.23
	75–175	64.29	11.90	5.97	3.02	0.69	1.09	0.55	0.07	0.29	11.85	99.72	4.38	0.25
	175–215	74.72	8.06	4.44	2.50	0.44	0.78	0.41	0.02	0.05	7.69	99.09	7.51	0.31
M1	0–11	68.82	8.20	6.16	3.49	0.56	1.55	0.34	0.05	0.12	9.20	98.50	6.80	0.43
	11–80	54.97	15.42	8.22	2.74	0.39	0.39	0.48	0.03	0.06	16.64	99.33	2.89	0.18
	80–154	75.89	7.47	2.97	2.65	0.34	0.60	0.21	0.02	0.05	8.69	98.89	8.23	0.35
	154–205	69.43	6.72	4.72	3.03	0.62	0.50	0.31	0.00	0.09	14.02	99.45	8.38	0.49