A Polish migrant worker lays freshly-harvested white asparagus into a box at the Buschmann und Winkelmann Spargelhof Klaistow asparagus farm on April 26, 2013 near Klaistow, Germany. White asparagus, which is grown under black sheeting to protect it from the sun in order to maintain the white color, is a national delicacy and one of the main agricultural products of the local Beelitz region.