How is the Zakat calculated for agricultural land that was purchased with the intention of trade five years ago, knowing that he only has his salary?

The Zakat (definition) on inherited land becomes due on its price if it is sold and a full year has passed since its sale. If the intention to sell purchased agricultural land is indecisive (to sell if needed), then no Zakat is due on it. However, if the intention to sell is firm after five years, then Zakat becomes obligatory on it. The Zakat is paid annually, based on its value at the end of each year (Hawl), and it is a quarter of one-tenth (2.5%) of its value. If liquidity is not available, the Zakat can be delayed until the land is sold or funds become available, and it must then be paid for all the past years.