This was probably taken in the 50's, and it's SO grandpa! The coveralls, that hat, the ever present dog, and no smile...lol I don't recognize the building behind him for sure, but it might have been the tool shed/granary between the house and barn...or else, the picture was taken at one of his kids' farms. Who had that wagon, behind the dog?
"Pa, wir brauchen Fleisch für das Abendessen, werden Sie töten einem Huhn?"
("Pa, we need meat for supper--will you go kill a chicken?")