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Appendix 1: Conversion for pH in water to pH inCaCl 2The conversion table for pH in water (1:5 soil to water) to pH in CaCl 2 (1:5 soil to 0.01M CaCl 2 ) is fromHenderson and Bui (2002). It is based on 70,465 observations collated to support <strong>ASRIS</strong> 2001. The values initalics are to be regarded as more doubtful extrapolations of the statistical curve because they aresupported by a smaller number of observations.Table 69: Conversion for pH in water to pH in CaCl 2 .Observed pHwaterPredicted pHCaCl 2Observed pHwaterPredicted pHCaCl 2Observed pHwaterPredicted pHCaCl 23.0 2.8 5.4 4.6 7.8 7.23.1 2.9 5.5 4.7 7.9 7.33.2 3.0 5.6 4.8 8.0 7.43.3 3.0 5.7 4.9 8.1 7.53.4 3.1 5.8 5.0 8.2 7.53.5 3.2 5.9 5.1 8.3 7.63.6 3.2 6.0 5.2 8.4 7.73.7 3.3 6.1 5.3 8.5 7.83.8 3.4 6.2 5.4 8.6 7.83.9 3.5 6.3 5.5 8.7 7.94.0 3.5 6.4 5.7 8.8 8.04.1 3.6 6.5 5.8 8.9 8.04.2 3.7 6.6 5.9 9.0 8.14.3 3.7 6.7 6.0 9.1 8.24.4 3.8 6.8 6.2 9.2 8.24.5 3.9 6.9 6.3 9.3 8.34.6 3.9 7.0 6.4 9.4 8.44.7 4.0 7.1 6.5 9.5 8.44.8 4.1 7.2 6.6 9.6 8.54.9 4.2 7.3 6.7 9.7 8.65.0 4.2 7.4 6.8 9.8 8.75.1 4.3 7.5 6.9 9.9 8.75.2 4.4 7.6 7.0 10.0 8.85.3 4.5 7.7 7.1 10.1 8.979
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