The young’n tells him. “Get yourself two sticks of dynamite, one with a short fuse and one with a long fuse. Put them both under the outhouse and light them both at the same time. The first one will go off and shoot the outhouse in the air. While it’s in the air the second one will then go off and spread the poo all across your farm, fertilizing your ground. The outhouse should then come back down to the same spot atop the now-empty hole.”

Pa thanks the neighbour, then drives to the hardware store and picks up two sticks of dynamite, one with a short fuse and one with a long fuse. He goes home and puts them under the outhouse. He then lights them and runs behind a tree.

All of a sudden, Ma comes running out of the house and into the outhouse! Off goes the first stick of dynamite, shooting the outhouse into the air.

BOOM! Off goes the second stick of dynamite, spreading poo all over the farm.
Then, WHAM! The outhouse comes crashing back down atop the hole.

Pa races to the outhouse throw open the door and asks. “Ma, are you all right?”

As she pulls up her panties she says. 
“Yeah, but I’m sure glad I didn’t break wind in the kitchen!”