MATERIAL AND METHOD
In the actual forage harvesting of Napier grass, the base
stem of the plant is cut off quickly. Hence, the Napier grass
stem was used as the subject in the impact shearing test, but
the impact shearing test for Napier grass leaf was not
carried out. In the Napier grass forage harvesting, the stem
mowing and fine cutting process is closely related to the
shearing action. The factors influencing the shear properties
are the moisture content in the crop stem, the harvest
period, the stem cross-section area, the shear blade
material, the bevel angle, and the shear velocity.