Volume Flow (\( Q_h \)):

\[ \begin{cases} Q_h = 0.016 \times A \times D^{0.79} & \text{for corn (13-16.5% wb)} \\ Q_h = 0.024 \times A \times D^{0.62} & \text{for sorghum (12-18% wb)} \\ Q_h = 0.018 \times A \times D^{0.72} & \text{for soybean (12% wb)} \end{cases} \]

Where:

• \( Q_h \) is the volume flow, in cubic meters per hour (m³/hr).
• \( A \) is the area of the orifice, in square centimeters (cm²).
• \( D \) is the hydraulic diameter, in centimeters (cm).