McRandal and McNulty (1980) carried out shearing
tests on forage grass stems, and, from the forcedisplacement
curve, obtained its mechanical properties,
which included shear strength, penetration resistance, and
shearing energy. They also used linear regression and
statistical methods to discuss the relevance of the crop
properties (maturity, solids content) and shear conditions
(bevel angle, shear velocity) of forage grass to the
abovementioned mechanical properties.