Study on The Influence of Direct Ground Liquid CO₂ Injection on Soil Chemical Properties in Subsidence Areas under Shallow Buried Geological Conditions

Table 3

P2 soil test results.

Number	pH value	Available nitrogen (mg/kg)	Available potassium (mg/kg)	Water-soluble salt (g/kg)	Total organic carbon (TOC) (g/kg)	Total carbon (TC) (g/kg)	Bicarbonate ions () (mg/kg)	Carbonate ions () (mg/kg)
P2FD1	4.52	416.97	34	1.9	2.1	3.62	19.15	0
P2FD2	4.51	485.05	30	1.6	7.1	8.7	20.2	0.95
P2FD3	4.40	459.44	30	1.5	0.6	1.34	19.35	0
P2XD1	4.39	364.45	32	2.4	1	2.19	19.45	0
P2XD2	4.36	327.29	32	1.3	0.3	0.75	20.35	0.85
P2XD3	4.20	433.62	27	1.9	2.4	4.12	19.5	0