A pecan is an example of a nut that does not reproduce seeds similar to those it came from. To get edible nuts from a wild pecan tree, consider grafting edible-fruit-producing limbs onto the tree. Bark grafting is the typical type of grafting used.
Saw a limb off the rootstock roughly 5 to 6 feet from the ground.
Remove an inch of bark from the end of the limb. With a razor-sharp grafting knife, slice a bevel cut into the end of the bud stick. (A bud stick is a shoot from which buds are cut to propagate the plant.) The cut should be 2 to 3 inches long.
Place the cut bud stick against the smooth wood of the branch and cut a pocket around the bud stick, roughly one inch away. Place a lighter cut down the center of the pocket. This cut should not go through the bark.
Use your thumb to gently hold the bark pocket in place and with your other hand slowly insert the bud stick into the bark pocket until the entire exposed area of the bud stick is tucked away firmly in the pocket.
Hammer the two nails into the graft. The first should be toward the end of the limb and the second at the tip of the bud sick that is in the bark pocket.
Wrap the entire graft in tin foil to reflect heat away from the site. Cover the graft in the polyurethane bag with the bud stick poking through. Place the rubber band at the base of the bud stick to hold the bag in place. Tie the bag tightly to the tree with the string.
Remove the bag and foil after new growth has formed in roughly two to three weeks.