Some bio-technical properties of flax seeds, fennel seeds, and
harmal seed capsules were determined. The size dimensions
(length, width, and thickness) of flax seeds and fennel seeds were
as 4.31 mm, 2.28 mm, 0.87 mm; 6.93 mm, 2.13 mm, 1.75 mm,
respectively. The diameter and length for harmal seed capsules
were 9.07 mm and 6.65 mm, respectively. The true density (ρt)
was determined using the liquid displacement method, and the
bulk density (ρb) was determined using the hectolitre tester. The
bulk density for flax seeds, fennel seeds, and harmal seed
capsules were determined as 384.3 kg m-3, 270.5 kg m-3 and
201.5 kg m-3, while, true density was found as 1256.5 kg m-3,
664.6 kg m-3, 936.2 kg m-3 for flax seeds, fennel seeds, and
harmal seed capsules, respectively. The sphericity of for flax
seeds, fennel seeds and harmal seed capsules were obtained as
0.47, 0.43, 0.72, respectively. The angle of repose was obtained
as 13.84º, 17.35º, 29.94º for flax seeds, fennel seeds, and harmal
seed capsules, respectively. The rubber friction surface has given
the highest static friction coefficient for flax seeds, fennel seeds,
and harmal seed capsules.