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

Table 2

P1 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)
P1FD1	4.20	420.94	37.5	1.3	2.4	4.12	18.55	0
P1FD2	4.03	432.43	28	2.3	1.8	3.2	19.35	0.7
P1FD3	4.05	423.00	32	1.5	2.3	4.11	18.95	0
P1XD1	4.05	412.33	28	3.0	1.1	1.98	19.35	0
P1XD2	4.20	387.94	31	2.5	1.1	2.01	20.2	0.85
P1XD3	4.01	398.66	30	1.4	2.8	3.68	18.65	0