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Table 7 The relationship (Pearson’s product movement coefficient of correlation) between soil physicochemical properties

From: Effects of soil and water conservation practices on soil physicochemical properties in Gumara watershed, Upper Blue Nile Basin, Ethiopia

Soil properties pH (H2O) SOC (%) SOM (%) TN (%) BD (g cm-3) Sand (%) Clay (%) Silt (%) Av. P (ppm) CEC and Exch. cations [cmol(+) kg−1]
CEC Na+ K+ Ca2+ Mg2+
pH (H2O) 1              
SOC (%) .673** 1             
SOM (%) .673** 1.000** 1            
TN (%) .628** .959** .959** 1           
BD (g cm-3) − .426* − .702** − .702** − .661** 1          
Sand (%) − .248 − .403 − .403 − .481* .598** 1         
Clay (%) .230 .354 .354 .461* − .417* − .608** 1        
Silt (%) − .133 − .192 − .192 − .277 .150 .140 − .871** 1       
Av. P (ppm) .232 − .221 − .221 − .227 .212 .029 .102 − .145 1      
CEC & Exch. cations [cmol(+) kg−1] CEC .619** .765** .765** .699** − .756** − .425* .339 − .160 .083 1     
Na+ .640** .756** .756** .783** − .496* − .504* .463* − .266 .093 .763** 1    
K+ .188 .115 .115 .082 − .228 − .257 − .130 .321 − .053 .232 .331 1   
Ca2+ .669** .641** .641** .553** − .747** − .428* .261 − .061 .183 .931** .621** .179 1  
Mg2+ .505* .741** .741** .734** − .501* − .304 .295 − .180 − .073 .768** .807** .380 .529** 1
  1. Av. P available phosphorous, BD bulk density, CEC cation exchange capacity, SOC soil organic carbon, SOM soil organic matter; **,* the correlation is significant at p < 0.01 and p < 0.05 respectively (two-tailed); TN total nitrogen