PH

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PH

The two-character ISO 3166 country code for PHILIPPINES.
References in periodicals archive ?
THE pH scale is used to measure acidity or alkalinity of soil.
The pH scale is logarithmic, this means that a difference of one pH unit represents a tenfold change.
Soil acidity should stay around 5 on a pH scale, to keep the rots from developing.
The pH scale can determine presence of additional contaminants which are not detected by halogenide testing (such as sulfates and nitrates), and can corroborate halogenide surface concentrations measured.
The acidity of water is measured on a pH scale, ranging from zero (maximum acidity) to 14 (maximum alkalinity).