The speed or rate at which seed lose moisture to the surrounding air depends
on how much lower air RH is than its equilibrium level with seed moisture
content, and seed characteristics such as size, shape, and composition.
When seed moisture content is high, drying or moisture loss rate is higher if
the drying air is of higher temperature and lower RH. As seed moisture
content decreases, moisture must migrate within the seed, to the seed surface,
and the drying rate slows down. Seed composition and structure also affect