where, Deff is the effective moisture diffusivity (m2/s); r is
the radius of soybean kernel (3.75 mm), X is the moisture
content (kg water/kg dry matter), and t is the time (s).
The method of slopes was used for the estimation of
effective moisture diffusivity of soybean kernels at corresponding
moisture contents under different drying conditions.
An analytical solution of Eq. (8) can be derived by making the
following assumptions (Pathare and Sharma 2006; Caglar
et al. 2009):