Examining the Effect of Combined Biochar and Lime Rates on Selected Soil Physicochemical Properties of Acid Soils in Gimbi District, Western Ethiopia

Table 1

Mean values of selected physicochemical properties of soil of preplanting of the study area and biochar produced from coffee husk (CHB).

Parameters	BD (g·cm^−3)	Clay (%)	Silt (%)	Sand (%)	TC	MC (%)	Po (%)	pH-H2O (1 : 2.5)	Ca^2+ (cmol(+)kg^−1)	Mg^2+ (cmol(+)kg^−1)	K^+ (cmol(+)kg^−1)	Na^+ (cmol(+)kg^−1)	BS (%)	CEC (cmol(+)kg^−1)	OC (%)	OM (%)	C/N	Total N (%)	Total P (mg·kg^−1)	Available P (mg·kg^−1)	NH4-N (mg·kg^−1)	NO3-N (mg·kg^−1)	EA (cmol(+)kg^−1)	EAl (cmol(+)kg^−1)
Soil of Farm-1	1.26	23	30	47	Loam	30.5	52.2	5.2	4.1	0.4	0.7	0.2	51.77	10.43	1.89	3.26	8.38	0.11	2.93	1.14	12.89	32.9	4.46	4.31
Soil of Farm-2	1.41	12	27	61	Sandy loam	23.6	46.7	4.63	1.94	0.2	0.4	0.3	31.35	9.06	1.55	2.67	11.11	0.09	1.19	0.91	15.89	38.6	5.13	4.92
Coffee husk biochar (CHB)	—	—	—	—	—	—	—	10.61	58.3	7.77	3.1	4.47	91.94	80.1	31.26	53.89	15.39	2.03	138.01	16.8	—	—	—	—

Bulk density (BD), soil texture class (TC), porosity (Po), moisture content (MC), potential of hydrogen (pH), exchangeable calcium (Ca²⁺), exchangeable magnesium (Mg²⁺), exchangeable potassium (K⁺), exchangeable sodium (Na²⁺), base saturation (BS), organic carbon (OC), organic matter (OM), nitrogen (N), carbon-to-nitrogen ratio (C/N), available phosphorous (available P), cation exchange capacity (CEC), exchangeable acidity (EA), exchangeable aluminum (EAl), ammonium nitrogen (NH₄-N), nitrate nitrogen (NO₃-N), and total mineral nitrogen (TMN).