What is the obligatory Zakat on a plot of land that was purchased for an unspecified purpose and remained for five years before being sold?

Zakat (definition) is obligatory on commodities if their owner intended only to trade with them at the time of purchase. However, if he intended both trade and other uses, then if the intention for trade predominated, Zakat becomes obligatory when a full year has passed. But if the intention for personal use (acquisition) predominated, there is no Zakat on them. Instead, a new year (for Zakat calculation) begins for the price (if they are sold).