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Lumber Preservation is a technology in Age of Empires IV that can be researched at the Lumber Camp starting in the Castle Age. Once researched, it increases Villagers' gathering rate for Wood by 15%.

Civilization bonuses

  • PN Icons Delhi 75px Delhi Sultanate: Technology is free, but takes 5x as long to research (375 seconds instead of 75 seconds).
  • PN Icons French 75px French: Economic technologies are 30% cheaper.
  • PN Icons Mongols 75px Mongols: improved technology - Villager wood gather rate +20% (cost another 500 stone)
Technologies in Age of Empires IV
Economic technologies
WoodForestry · Double Broadax · Lumber Preservation · Crosscut Saw
FoodHorticulture · Fertilization · Precision Cross-Breeding
Gold/StoneSpecialized Pick · Acid Distillation · Cupellation
HuntingProfessional Scouts · Survival Techniques
FishingExtended Lines · Drift Nets
VillagerWheelbarrow · Textiles
RelicTithe Barns
Military technologies
Melee damageBloomery · Decarbonization · Damascus Steel
Ranged damageSteeled Arrow · Balanced Projectiles · Platecutter Point
Melee armorFitted Leatherwork · Insulated Helm · Master Smiths
Ranged armorIron Undermesh · Wedge Rivets · Angled Surfaces
Ship (General)Armored Hull · Shipwrights
Archer ShipExtra Hammocks · Heated Shot
Incendiary ShipIncendiaries · Explosives
Springald ShipSpringald Crews · Swivel Cannon · Mounted Guns
Siege (General)Siege Engineering · Greased Axles · Siege Works
Siege (Specific)Geometry · Adjustable Crossbars · Roller Shutter Triggers · Lightweight Beams
MiscellaneousSpyglass · Biology · Elite Army Tactics · Incendiary Arrows · Chemistry
Religious unitsPiety · Herbal Medicine
Building-specific technologies
EmplacementsArrowslits · Naval Arrowslits · Springald Emplacement · Cannon Emplacement · Fortify Outpost
MiscellaneousBoiling Oil · Court Architects · Military Academy
Unique technologies
CivIcon-AbbasidAoE4 Abbasid DynastyComposite Bows · Camel Rider Barding · Camel Handling · Camel Support · Camel Rider Shields · Medical Centers · Improved Processing · Agriculture · Boot Camp · Teak Masts · Proselytization · Preservation of Knowledge · Phalanx · Armored Caravans · Grand Bazaar · Spice Roads · Fresh Foodstuffs · Fertile Crescent
CivIcon-AyyubidsAoE4 AyyubidsPhalanx · Teak Masts · Infantry Support · Siege Carpentry · Sultan's Mamluks · House of Wisdom technologies (Advancement · Logistics · Growth · Industry · Master Smiths · Reinforment · Advisors · Bazaar)
CivIcon-ByzantinesAoE4 ByzantinesHeavy Dromon · Liquid Explosives · Expilatores · Trapezites · Numeri · Greek Fire Projectiles · Mercenary contracts (Eastern · Western · Silk Road) · Veteran Contract · Elite Contract · Teardrop Shields · Ferocious Speed · Border Settlements · Mangonel Emplacement
CivIcon-ChineseAoE4 ChineseReload Drills · Ancient Techniques · Pyrotechnics · Imperial Examinations · Additional Barrels · Battle Hardened · Extra Materials · Handcannon Slits · Thunderclap Bombs
CivIcon-DelhiAoE4 Delhi SultanateArmored Beasts · Howdahs · Forced March · Village Fortresses · Honed Blades · Tranquil Venue · Lookout Towers · Reinforced Foundations · All-Seeing Eye · Efficient Production · Sanctity · Swiftness · Zeal · Hearty Rations · Slow-Burning Defenses · Manuscript Trade
CivIcon-EnglishAoE4 EnglishNetwork of Citadels · Enclosures · Arrow Volley · Armor Clad · Admiralty · Shattering Projectiles
CivIcon-FrenchAoE4 FrenchCrossbow Stirrups · Gambesons · Royal Bloodlines · Enlistment Incentives · Long Guns · Cantled Saddles · Chivalry · Merchant Guilds
CivIcon-HREAoE4 Holy Roman EmpireSlate and Stone Construction · Reinforced Defenses · Devoutness · Heavy Maces · Two-Handed Weapons · Fire Stations · Inspired Warriors · Riveted Chain Mail · Steel Barding
CivIcon-JapaneseAoE4 JapaneseTowara · Takezaiku · Fudasashi · Copper Plating · Tatara · Hizukuri · Kobuse-gitae · Yaki-ire · Odachi · Nagae Yari · Do-maru Armor · Kabura-ya Whistling Arrow · Daimyo Manor · Daimyo Palace · Shogunate Castle · Zen · Nehan · Five Mountain Ministries · Shinto Rituals · Gion Festival · Bunrei
CivIcon-JeannedArcAoE4 Jeanne d'ArcCrossbow Stirrups · Gambesons · Royal Bloodlines · Long Guns · Cantled Saddles · Chivalry · Companion Equipment · Ordinance Company · Merchant Guilds
CivIcon-MaliansAoE4 MaliansBanco Repairs · Farima Leadership · Imported Armor · Local Knowledge · Poisoned Arrows · Precision Training · Canoe Tactics
CivIcon-MongolsAoE4 MongolsImproved technologies · Whistling Arrows · Yam Network · Piracy · Superior Mobility · Monastic Shrines · Additional Torches · Raid Bounty · Stone Bounty · Siha Bow Limbs · Stone Commerce · Steppe Lancers · Pax Mongolica
CivIcon-OrderoftheDragonAoE4 Order of the DragonSlate and Stone Construction · Reinforced Defenses · Fire Stations · Inspired Warriors · War Horses · Dragon Fire · Golden Cuirass · Dragon Scale Leather · Zornhau · Bodkin Bolts
CivIcon-OttomansAoE4 OttomansJanissary Guns · Imperial Fleet · Advanced Academy · Anatolian Hills · Fast Training · Field Work · Great Bombard Emplacement · Janissary Company · Mehter Drums · Military Campus · Siege Crews · Trade Bags
CivIcon-RusAoE4 RusFine Tuned Guns · Boyar's Fortitude · Mounted Training · Knight Poleaxes · Siege Crew Training · Wandering Town · Divine Light · Fervor · Saint's Veneration · Banded Arms · Castle Watch · Castle Turret · Adaptable Hulls
CivIcon-ZhuXiLegacyAoE4 Zhu Xi's LegacyRegional Inspection · Single Whip Reform · Imperial Red Seals · Advanced Administration · Military Affairs Bureau · Thunderclap Bombs · Handcannon Slits · Cloud of Terror · Roar of the Dragon · 10000 Bolts · Dynastic Protectors
Removed technologies
Season Two UpdateShipwrights
Season Three UpdateAdditional Sails · Navigator Lookout · Extra Ballista · Chaser Cannons · Patchwork Repairs · Clinker Construction · Cedar Hulls
Season Four UpdateImproved Blessing · Saint's Reach
Season Five UpdateReusable Barrels · Benediction · Setup Camp · Double Time
Season Seven UpdateMarching Drills
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