Unlocks the Builder ability to construct a Terrace Farm, unique to the Inca.

+1 Food, +1 Housing. +1 Production if adjacent to Fresh Water. +1 Food for every adjacent Mountain Tile, additional Production and Food as you advance through the Civics and Technology Tree. Triggers the Eureka of 'Irrigation' Technology and the Inspiration of 'Feudalism' Civic if built on resource. Built on tiles adjacent to the builder. Must be built on Hills or Mountain tiles in Grassland, Plains or Desert (including Volacanos).

+1 Production from every 2 adjacent Terrace Farm tiles, requires Construction.
+1 Food from each adjacent Desert (Mountain) tile, becomse obsolete with Engineering.
+2 Food from each adjacent Desert (Mountain) tile, requires Engineering.
+1 Food from each adjacent Grassland (Mountain) tile, becomse obsolete with Engineering.
+2 Food from each adjacent Grassland (Mountain) tile, requires Engineering.
+1 Food from each adjacent Terrace Farm tile, requires Biology.
+1 Food from every 2 adjacent Terrace Farm tiles, requires Feudalism, becomse obsolete with Biology.
+1 Food from each adjacent Plains (Mountain) tile, becomse obsolete with Engineering.
+2 Food from each adjacent Plains (Mountain) tile, requires Engineering.
+1 Food from each adjacent Snow (Mountain) tile, becomse obsolete with Engineering.
+2 Food from each adjacent Snow (Mountain) tile, requires Engineering.
+1 Food from each adjacent Tundra (Mountain) tile, becomse obsolete with Engineering.
+2 Food from each adjacent Tundra (Mountain) tile, requires Engineering.