The paper presents a study on the air flow resistance of beetroot seed bed. Air pressure drop across a porous layer of the seed, within a wide range of Reynolds number values, was described with a modified Levy equation. Determination of coefficient of resistance depending on Reynolds number allows to design a height of the layer in an dryer for a particular fan or to select the fan for the assumed height of the bed, which ensures the optimum drying time. Physical properties of beetroot seeds were determined. Pressure drop in the different heights of the bed were estimated. This allowed to determine the elementary pressure gradient. Relationship between the elementary pressure gradient and airflow velocity was described by Ergun equation. To describe the relationship between the coefficient of resistance and a constant Reynolds number friction K₂ = 15.03 was calculated.