Is Zakat obligatory on the amount from selling a piece of land that was purchased for long-term investment, then sold before the intended term due to a partner's desire?

If you bought the land with the intention of trading, then you and your partners must pay zakat (definition) on its value every year, provided that a full year has passed since the payment of its price, and that the value of each person's share reaches the nisab (definition) (minimum threshold) either individually or by combining it with any money or trade goods he owns. Zakat is to be paid from the aforementioned amount if it reaches the nisab.