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Table 3 Correlation matrix between selected parameters based on Pearson's correlation coefficient r

From: Spring waters as an indicator of nitrate and pesticide pollution of rural watercourses from nonpoint sources: results of repeated monitoring campaigns since the early 2000s in the low mountain landscape of Saarland, Germany

R NO3 NH4+  EC Δ T O2 median O2 min Farmland [%] Cropland [%]
NO3 1.00        
NH4+ 0.00 1.00       
EC 0.29 0.14 1.00      
Δ T − 0.18 0.49 − 0.11 1.00     
O2 median − 0.03 − 0.44 − 0.27 − 0.27 1.00    
O2 min 0.07 − 0.49 − 0.20 − 0.51 0.82 1.00   
Farmland 0.80 0.09 0.47 0.00 − 0.07 − 0.09 1.00  
Cropland 0.88 0.10 0.36 − 0.07 − 0.04 0.03 0.86 1.00
  1. Bold = p < 0.05