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Table 2 Pearson’s correlation matrix of physico-chemical properties and heavy metal contents of soil

From: Heavy metals bioaccumulation in Berseem (Trifolium alexandrinum) cultivated in areas under intensive agriculture, Punjab, India

 

pH

Cond.

Sand

Silt

Clay

SOM

Ca

Mg

Na

K

N

P

CaCO3

Cr

Cu

Cd

Co

Cond.

0.23

                

Sand

0.03

0.88**

               

Silt

−0.02

−0.85**

−0.99**

              

Clay

−0.05

−0.83**

−0.85**

0.79**

             

SOM

0.62*

0.39

0.32

−0.32

−0.24

            

Ca

−0.39

0.51

0.44

−0.42

−0.47

−0.08

           

Mg

0.64*

0.53

0.15

−0.11

−0.34

0.39

0.17

          

Na

0.33

−0.34

−0.01

−0.04

0.18

0.30

−0.60*

0.89**

         

K

0.06

−0.71**

−0.38

0.33

0.52

0.01

−0.65*

−0.60*

0.89**

        

N

0.17

−0.61**

−0.86**

0.88**

0.61*

−0.37

−0.33

0.19

−0.21

0.08

       

P

0.43

0.90**

0.64*

−0.60*

−0.68*

0.49

0.43

0.72**

−0.42

0.75**

−0.33

      

CaCO3

−0.92**

−0.38

−0.26

0.25

0.27

−0.77*

0.23

−0.57

−0.40

−0.04

0.12

−0.51

     

Cr

0.13

0.13

−0.13

0.09

0.28

−0.24

0.00

0.24

−0.43

−0.42

0.30

0.20

0.01

    

Cu

−0.17

0.66

0.80**

−0.77**

−0.83**

0.43

0.54

0.02

−0.04

−0.30

−0.81**

0.48

−0.13

−0.52

   

Cd

−0.18

0.14

−0.19

0.20

0.10

−0.49

0.07

0.27

−0.77**

−0.64*

0.33

0.25

0.34

0.69*

−0.35

  

Co

0.54

−0.23

0.02

−0.05

0.14

0.45

−0.65*

−0.20

0.97**

0.80**

−0.17

−0.25

−0.59*

−0.38

−0.04

−0.73**

 

Pb

−0.10

−0.54

−0.12

0.08

0.29

−0.02

−0.59*

−0.70*

0.89**

0.93**

−0.20

−0.67*

0.03

−0.49

−0.05

−0.65*

0.77**

  1. * Correlation is significant at the 0.05 level (2-tailed)
  2. ** Correlation is significant at the 0.01 level (2-tailed)