highly significantp < 0.0001
Altered K/Na, Ca/Na and Mg/Na Concentration Ratios Are Strong Indicators of Na-Stress Exposure The ANOVA summary for concentration ratios of K, Ca or Mg with Na in examined test crop tissues showed a highly significant ( p < 0.0001) impact of NaCl salinity, whereas the soil Cd contamination as well as the CdxNaCl interaction were not significant ( Table S3 ).