write two methods to determine the pH of soil
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Namely, which extraction (saturated soil paste; 1:1; 1:2 soil to water extractions) could be used without errors (and if they are convertable between each other) and also how and when to apply extraction with 0.01 M CaCl2 or 1 M KCl.
In the particular case of 1 M KCl, this solution is also used to obtain the exchangeable acidity of the soil. As the name suggests, this extraction, in theory, should, if the soil has a large value of exchangeable acidity, have a lower (or even much lower) pH than an extraction with destilled water.
On the other hand, pH measurement with 1 M KCl is recommended for better and faster results in the pH electrode.
Finally, should the soil solution be filtered or centrifuged prior to pH measurement? Some cite the use of 0.01 M CaCl2 as a method to increase soil flocculation and have a clearer supernatant but couldn't that be substituted with appropriate filtration / centrifugation?
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In the particular case of 1 M KCl, this solution is also used to obtain the exchangeable acidity of the soil. As the name suggests, this extraction, in theory, should, if the soil has a large value of exchangeable acidity, have a lower (or even much lower) pH than an extraction with destilled water.
On the other hand, pH measurement with 1 M KCl is recommended for better and faster results in the pH electrode.
Finally, should the soil solution be filtered or centrifuged prior to pH measurement? Some cite the use of 0.01 M CaCl2 as a method to increase soil flocculation and have a clearer supernatant but couldn't that be substituted with appropriate filtration / centrifugation?
i hope it will help you ..
please mark as brainliest please..
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