Moisture Content (\( M_d \)):

\[ M_d = E - F \ln \left[ -R ( T + C) \ln RH \right] \]

Where:

• \( M_d \) is the moisture content, in decimal dry basis.
• \( E \) is a constant, ranging from 0.0183212 to 0.480920.
• \( F \) is a constant, ranging from 0.026383 to 0.066826.
• \( R \) is the universal gas constant, 1.987.
• \( T \) is the temperature, in degrees Celsius (°C).
• \( C \) is a constant, ranging from 12.354 to 120.098.
• \( RH \) is the relative humidity, in decimal.