Wood is an important resource in The Hobbit: Kingdoms of Middle-earth.
Elven Arboretums and Dwarven Lumber Mills increase the wood production of the city, along with boosts from Research in Arbors which allows you to increase wood production by 10% per level.
By conquering Woods your wood production increases by 5%*[level of Woods] conquered.
Wood is needed for the construction of city buildings, buildings and the training of troops. Wood can be protected from attacks by the Vault.