He introduced an agricultural land tax.He taxed provincials on the amount of olive oil they exported.He forbade land from being taxed in any way.He taxed shipowners by the weight of grain their ships carried.How did Diocletian reform the Roman tax system?Elon.io is an online learning platformWe have an entire course teaching World History 1 grammar and vocabulary.Start learning World History 1 nowYour questions are stored by us to improve Elon.ioYou've reached your AI usage limitSign up to increase your limit.