how could soil pH modification affect organic matter functional groups?
What is the best way to characterize this effect?
pH modified using gaseous acid and base.
Y. Steinberger
The question is not clear - what you mean functional groups ? microflora ? micro meso-fauna ? or organic matter fractions ?
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Ahmad Amer
The functional groups of organic matter coating soil particles i.e. -OH, -COOH, -NH2 etc.
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Nguyen Hue
Carboxylic (-COOH) and phenolic (-OH) functional groups will deprotonate (release of H+) if the soil pH is greater than their pHa, which ranges from 1 to 7 to COOH and about 8-10 for -OH. Amine (-NH2) group will take up a H+ to become -NH3+ if the soil pH is acidic.
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