Help with Planting Potatoes

"A bright young farmer serving in the army oversees received a letter from his wife. She wanted to know how she was going to plant the potatoes in the north 40 without any help.

"The soldier wrote back, 'Whatever you do, dear, do not dig up the north 40. That's where the guns are buried.'

"As is customary, his letter was censored. Not long after, he received another letter from his wife, saying, 'A company of soldiers swarmed over the north 40 and dug it all up. Now what shall I do'

"The soldier/husband/farmer wrote back, 'Plant the potatoes!'" - Source Unknown