Ojo's family works at the Munchkin Farm, a huge urban farm in Emerald City. Munchkins are known for being gifted farmers, naturally born with green thumbs (although they prefer the color blue).
Jo gives Dorothy a laundry list of Ozian creatures who may want to steal Glinda's Pearl, all of which come from various fairylands within Oz: Dragons, Spiders, Growleywogs, Hammer-Heads, Invisible Bears, Phanfasms, Scoodlers, Skeezers, Wheelers, Whimsies.
Ojo tells Dorothy about a Lunchpail Tree he and his father planted. These trees are native to the Land of Ev, and when they're ripe they bud with lunch-boxes full of delicious meals, ranging from hoagie sandwiches to mac and cheese.
Glinda hides her Pearl of Pingaree with Scarecrow. Pingaree is an island in the Nonestic Sea known for producing magic pearls.