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

Table 3

Soil property variation of elements within the treatments.

Treatment	% SOM	N	S	P
Wfb^b	0.98 ± 0.04	0.11 ± 0.001	8.98 ± 1.4	0.66 ± 0.07
Bc^b	1.03 ± 0.2	0.21 ± 0.01	9.94 ± 1.54	0.37 ± 0.05
Bg^a	5.74 ± 0.45	0.38 ± 0.04	49.46 ± 6.7	5.66 ± 1.3
If ^a	3.75 ± 0.21	0.35 ± 0.0.02	49.98 ± 6.9	5.67 ± 1.01

Bg = biochar grass; Bc = biochar chat; If = inorganic fertilizer; Wfb = control plot (free from biochar and fertilizer); SOM = soil organic matter; N = nitrogen; S = sulfur; P = phosphorus. Treatments with the same letters were not significantly different at .