. 2021 Jul 14;11:14489. doi: 10.1038/s41598-021-93805-5

Table 4.

Soil properties of three different soil types (landfill saline soil, forest infertile soil, and forest acidic soil) before fertilizer treatment.

Soil properties	Landfill saline soil	Forest infertile soil	Forest acidic soil
Sand (%)	1.0 (0.1)^c	83.8 (0.5)^a	52.1 (1.0)^b
Silt (%)	81.0 (0.5)^a	11.1 (0.5)^c	32.9 (0.9)^b
Clay (%)	18.0 (0.5)^a	5.1 (0.0)^c	15.0 (0.2)^b
pH	6.88 (0.17)^a	6.56 (0.09)^a	4.63 (0.00)^b
Organic matter (%)	0.95 (0.04)^b	0.29 (0.01)^c	3.77 (0.04)^a
Total N (g kg⁻¹)	0.46 (0.03)^b	0.12 (0.00)^c	1.06 (0.02)^a
Available P (mg kg⁻¹)	46.2 (1.0)^a	19.6 (0.3)^b	0.8 (0.2)^c
CEC (cmol_c kg⁻¹)	20.1 (0.3)^a	8.5 (0.2)^b	18.2 (0.8)^a
Exchangeable K⁺ (cmol_c kg⁻¹)	1.66 (0.06)^a	0.19 (0.03)^b	0.17 (0.02)^b
Exchangeable Ca²⁺ (cmol_c kg⁻¹)	1.04 (0.03)^b	1.38 (0.05)^a	0.25 (0.01)^c
Exchangeable Mg²⁺ (cmol_c kg⁻¹)	3.97 (0.07)^a	0.81 (0.02)^b	0.25 (0.01)^c
Exchangeable Na⁺ (cmol_c kg⁻¹)	5.65 (0.04)^a	0.12 (0.01)^b	0.14 (0.01)^b
EC (dS m⁻¹)	3.97 (0.34)^a	0.22 (0.03)^b	0.25 (0.00)^b
NaCl (%)	0.18 (0.01)^a	0.01 (0.00)^a	0.01 (0.00)^b

Standard errors are shown in parentheses (n = 3). Mean values with the same letters are not significantly different within each soil property across three soil types (p < 0.05; Tukey’s HSD test).