Effect of Biochar and Inorganic Fertilizer on the Soil Properties and Growth and Yield of Onion (Allium cepa) in Tropical Ethiopia

Table 2

Soil pH, EC, and CEC analysis in the biochar and inorganic fertilizer treatment.

Treatment	pH^1	EC^1	CEC^1
Wfb^b	4.92 ± 0.8	0.2 ± 0.03	16.28 ± 1.9
Bc^b	5.38 ± 0.9	0.23 ± 0.01	18.23 ± 2.1
Bg^a	6.43 ± 1.2	0.42 ± 0.02	28.08 ± 3.8
If ^a	6.74 ± 1.0	0.33 ± 0.03	25.36 ± 3.5

Bg = biochar grass; Bc = biochar chat; If = inorganic fertilizer; Wfb = control plot (free from biochar and fertilizer). ¹Mean of the four-treatment pH, electric conductivity (EC), and cation exchange capacity (CEC). Treatments with the same letters were not significantly different at .