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.
In man, about 50% of spermatozoa are stored in the cauda (tail) of the epididymis, with the average time of storage in the epididymis between 10 and 20 days. Sperm can be damaged during epididymal storage by elevated temperature (such as in the presence of a varicocele), infection, or other hostile conditions.