We had bought a piece of yam from the market. It had a tiny projection which I knew was the place from where plants emerge. I slowly sliced off that tiny bit and placed it in soil in a plastic bag. I did not think it would start getting life and getting life it did. It is now almost a month. It did not let me down. The plant has grown to a height of about 8 inches. I shall now transplant it in a large pot and hope by next year I will get a full yam.