These pegs were carved from pine heartwood, one of the hardest and most durable of woods. They were used for about twenty years, then retired when the farmers retired. I found them on tobacco barn shed supports about 30 years ago. They could still be used to good effect.
Here are two pegs. The sloped end rested on the heal and palm of the hand, and the pointed end punched a hole in the earth to receive the plant. These pegs were mostly used to plant tobacco, but also were useful to plant such things as sweet potato and strawberry plants.
The peg was cut from pine heartwood and shaped and polished to be very effective.