A city type moves to the country and decides he wants to be a farmer. So he goes to the local farm shop and tells the man: "Give me 100 baby chickens."

The farm shop worker complies. A week later the man returns and says: "Give me 200 baby chickens."

Again, a week later the man returns. This time he says: "Give me 500 baby chickens."

"Wow," the farm shop worker replies. "You must really be doing well."

"Nah," says the man with a sigh. "I'm either planting them too deep or too far apart."