I believe Leeeroieee had posted it in another thread, he’ll be happy to post them here just wait till he comes on and sees this
Iron ingots, carrots and potatoes (0.8% chance each, 1.2% chance with Looting I, 1.5% chance with Looting II and 1.8% chance with Looting III). (Source: Zombie – Official Minecraft Wiki) This is if Zombie drops follow normal Minecraft rules which I am not sure about.
I have been told that the droprate has been modified for the skyblock.net. This, coming from a credible source and seeming to me like a reasonable precation for a server like this to take has lead me to believe this is correct, I am therefore asking for the modified drop rate. This reply was written before the subtext was added to the message it replies to.
Iron drop from zombies is disabled. BUT chicken riders still drop iron with the vanilla chances i think.