Home Page - Harvest Tec Harvest Tec's specialized application equipment and hay preservative are available through the major manufacturers of hay harvesting implements. Your local dealer can assist you in setting up your bal Harvest Tec's specialized application equipment and hay preservative are available through the major manufacturers of hay harvesting implements. Your local dealer can assist you in setting up your baler or forage harvester to apply preservatives. This webpage provides information to help you in your selection.