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.
Those sperm that die do so within the first 48 hours of freezing, and the attrition rate thereafter is minimal. Frozen semen can be stored for as long as 50 years without additional sperm deterioration beyond that caused by the original freezing process.