Assessment of soil quality for agricultural purposes around the Barapukuria coal mining industrial area, Bangladesh: insights from chemical and multivariate statistical analysis

Environmental Systems Research

Table 6 Chemical parameters of different clustered groups with their min, max, and mean value

Clusters	pH	Total nitrogen	OM	K	P	S	Fe	As	Cu	Ni	Total alkalinity
Cluster 1
Min	*4.97*	*0.06*	2.36	0.27	22.8	3.79	1.27	0	1.54	0.1	10
Max	*6.65*	*0.21*	2.63	0.48	44.6	44.52	24.37	0.025	2.138	1.28	100
Mean	*5.67*	*0.13*	2.495	0.35	29.2	20.01	15.13	0.004	1.854	0.49	54.2
Cluster 2
Min	6.13	*0.13*	0.58	4.6	15.8	14.26	1.891	0.01	0.837	0.41	85
Max	6.77	*0.15*	0.7	9.6	38.4	25.39	2.92	0.01	1.25	0.42	120
Mean	6.45	*0.14*	0.58	7.1	29.1	24.83	2.41	0.01	1.04	0.415	102.5
Cluster 3
Min	5.82	*0.07*	0.48	0.28	21.3	2.262	7.83	0	0.454	0.54	65
Max	6.83	*0.1*	0.68	0.31	25.3	4.32	10.72	0	1.231	0.57	150
Mean	6.33	*0.09*	0.58	0.295	23.3	3.29	9.05	0	0.84	0.56	107.5

Italic marks in the table indicate higher value of chemical parameters than the Standard reference value of RSRDIB and bolditalic marks indicate lower value of chemical parameters than the Standard reference value of RSRDIB