Talk:Game Updates/@comment-76.112.96.230-20130502121134/@comment-216.52.207.123-20130502145601

http://dragonvale.wikia.com/wiki/Boost_Calculation_Guide

See if that helps. The thing to keep in mind is a Boost only affects the island it is on, not the whole park. So if you have a Plant Boost on an island just make sure no dragns on the island have a Metal Element in them, and any Dragon with a Plant Element will earn more.

Personally, I set up my islands with 2 boosts per island (so 4 islands with boosts) so some dragons can gain the effects of 2 boosts at once (earn 40% more).

Opposite Dragons can't be anywhere near either Boost that contains their element.