This may require planting deeper than 1.5 inches under dry soil conditions. If you must plant deeper than 1.5 inches in order to place the seed into uniform moisture, make sure the variety has an excellent emergence score or long hypocotyl. Also, consider seed size when deciding how deep to plant.
Sperm is made in the testes, but stored in the epididymis, a gland where it is also matured. Sperm from the testes cannot yet move on their own.
Sperm are single cells. I think you meant to ask what does semen contain. Semen contains sperm, fluids, sugars, acids and other nutrients to nourish the sperm and provide a way for them to move outside of the body. Even if you didn't masturbate, you'd still have ejaculations in your sleep.