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.
Once the sperm are produced, they move to the epididymis, where the sperm grow, mature, and learn to swim. The epididymis is a collection of tubes running along the back side of each testicle, that serve as sperm collectors from each testicle, and as a storage area for the sperm to develop.