ABSTRACT
Bulk density of a clean grain sample (for corn, the
sample is not cleaned) is determined by filling a 500-
mL metallic container (90 mm diameter and 78 mm
high) from a funnel with a 38.1 mm opening and
having a flat slide gate. The opening of the funnel is
maintained at 44.1 mm above the top of the con-
tainer. Grain required to fill the container plus a
small additional amount are loaded into the funnel
whereas its gate is closed. When the gate is opened,
the sample flows freely from the funnel into the center
of the container and fills the container to overflowing.
The grain in the container is leveled by striking off the
excess grain with a round rod (19-mm diameter hard-
wood) using three equal zigzag movements at an
angle to the direction of movement of approximately
458. The mass of the grain in the container is measured and the bulk density (kg/m3) or the test weight
(kg/hL) is calculated (Canadian Grain Commission
[2]). The bulk density for common grains and oilseeds
are summarized in Table 24.1 (ASAE [3]).
