I am conducting a microcosm study, studying the effect of pH. How do I reliably measure soil pH? (So far I have been measuring soil pH in a ratio of 1:2 soil:water). Once I have this pH, how do accurately determine how much NaOH or HCl to add to my microcosm (50g of soil) to get desired pH?
Thanks in advance!
The link as suggested of Science direct will be helpful
Dear Mel
Have a look at these links.
https://core.ac.uk/download/pdf/20660799.pdf
https://www.sciencedirect.com/science/article/pii/S1164556399001041
https://academic.oup.com/femsec/article/58/2/303/567816
I hope you find this information helpful
Dear Sir. Concerning your issue about the measurement and adjustment of soil pH for a microcosm study . The treatment might be necessary when reproducing an agricultural soil. For one of our experimental aims, the soil pH was adjusted to a pH often found in soils at commercial sugarcane fields (5.5–6.0). A neutralization curve was previously determined as described by CETESB for respirometric assays. In summary, at least five different amounts of CaCO3 following an arithmetical progression were added to 20 g of soil in Erlenmeyer flasks for 125 mL in three replicates. Soil and CaCO3were mixed and kept under 70% of WHC during 7 days. Afterwards, soil pH was determined in CaCl 0.01 mol L−1 at ratio 1:2.5 (w:v). For this soil, 740 mg kg soil−1 of CaCO3 was required to adjust the soil pH to the target range (5.5–6.0). I think the following below links may help you in your analysis:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6039707/pdf/main.pdf
http://trop.troy.edu/kyu/2007-SSSAJ.pdf
https://academic.oup.com/femsec/article/25/4/319/494991
Thanks
Isam Eldin Hussein Elgailani Could you please send me a more detailed protocol based on the CETESB? I cannot find an English version. Thank-you in advance.
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