She and Callie are in the same place in 1930 but she is listed as "Julie" Datcher

Callie Datcher 47
Julie Datcher 49
Cora Datcher 16
Seola Datcher 13
Mamie Datcher 12
Hattie Datcher 11
Jancy Datcher 10
Deampa Datcher 9
Eldon Datcher 5
Eugene Datcher 4 1/12

**There is a note from someone named Naomi977 that reads: "Ludie Lee Datcher's husband Callie Datcher and 2nd wife Julie. All of the children are Ludie's children."

So this may in fact be a 2nd wife whose name is Julie rather than this being Ludie.