The Lumber Boost attribute increases the amount of output and skills xp you get from #!chop
Formula: +1 item = x/25 points
+1 skill xp = x/125 points
For each level you get 5 attribute points, that would mean +1 #!chop output for every 5 levels, if you invest them all in Lumber Boost. That would also mean +1 skill xp for every 25 levels, if you invest them all in Lumber Boost.
* XP Boost * Gold Boost * Criticals * Reaping * Salvaging * Strength * Lumber Boost * Mine Boost * Defense * Scavenging * Taming