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

Table 5

Pearson correlation among acidic soil properties’ parameters.

Variable		BD	pH	SOC	CEC	Available P	EA	NH4-N	NO3-N	TMN
Farm-1
BD		1
pH		−0.80	1
SOC		−0.83	0.83	1
CEC		−0.41	0.29^ns	0.46	1
Available P		−0.61	0.62	0.63	0.66	1
EA		0.13^ns	−0.35^ns	−0.23^ns	−0.07^ns	−0.44	1
NH4-N		−0.54	0.66	0.64	−0.26^ns	0.12^ns	−0.06^ns	1
NO3-N		0.71	−0.77	−0.87	−0.10^ns	−0.23^ns	−0.00^ns	−0.83	1
TMN		0.56	−0.51	−0.71	−0.55	−0.26^ns	−0.10^ns	−0.17^ns	0.68	1
Farm-2
BD		1
pH		−0.64	1
SOC		−0.19^ns	0.24^ns	1
CEC		−0.31^ns	−0.24^ns	0.62	1
Available P		−0.45	0.37^ns	0.08^ns	0.24^ns	1
EA		0.32^ns	−0.28^ns	−0.35^ns	−0.33^ns	−0.50	1
NH4-N		−0.56	0.25^ns	0.34^ns	0.57	0.26^ns	−0.56	1
NO3-N		0.52	−0.21^ns	−0.49	−0.53	0.03^ns	0.50	−0.79	1
TMN		−0.43	0.21^ns	−0.13^ns	0.44	0.42	−0.45	−0.88	−0.40	1

Bulk density (BD), potential of hydrogen (pH), soil organic carbon (SOC), cation exchange capacity (CEC), available phosphorous (available P), exchangeable acidity (EA), ammonium nitrogen (NH₄-N), nitrate nitrogen (NO₃-N), total mineral nitrogen (TMN) as influenced by effect of biochar (CHB), and soil test value-based lime (STV) rates. ns: non-significant, : significant (), : highly significant ().