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

Table 4

P3 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)
P3FD1	5.74	384.61	28	2.1	3.2	5.49	22.35	0
P3FD2	5.50	386.76	27	1.9	1.2	2.63	23.6	1.25
P3FD3	5.18	437.75	28	1.3	2.9	4.97	22.85	0
P3XD1	5.50	325.41	27	0.5	0.4	0.89	24.3	0
P3XD2	4.91	324.44	28	0.2	0.9	1.96	23.15	1.45
P3XD3	4.78	346.73	29	1.2	2.7	4.66	22.95	0