English walnuts (Juglans regia L.) are drupes consisting of a fleshy
green fruit, called the hull or husk, surrounding a hard shell
encasing a seed that is commonly called the nut meat or kernel.
When mature, the walnut hulls dehisce or split open, exposing the
inshell nut. At maturity, walnuts are mechanically shaken from the
tree. At this point the nuts may completely release from the hull or
they may be fully or partially covered by the hull. The walnuts are
then mechanically collected from the ground by sweeping into
windrows, loaded into trailers, and transported to a hullerdehydrator