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Table 5 Correlation coefficient among metals and properties of soil

From: Bioaccumulation of heavy metals in soil and selected food crops cultivated in Kogi State, north central Nigeria

  pH TOC TOM Cu Zn Pb Cd Ni Co
pH 1         
TOC −0.096 1        
TOM −0.095 1.000b 1       
Cu −0.113 0.043 0.043 1      
Zn −0.107 0.029 0.030 0.519b 1     
Pb 0.164 −0.171 −0.171 0.300b 0.168 1    
Cd −0.053 0.069 0.070 0.409b 0.238a 0.061 1   
Ni −0.107 0.142 0.143 0.514b 0.486b 0.193 0.95 1  
Co 0.167 −0.029 −0.028 0.752b 0.390b 0.346b 0.364b 0.644b 1
  1. aCorrelation is significant at the 0.05 level (2-tailed)
  2. bCorrelation is significant at the 0.01 level (2-tailed)