Is zakat obligatory on farm produce intended for household consumption and gifts if it reaches the nisab by estimation and not with certainty?

Zakat is obligatory on what reaches a nisab—which is three hundred sa's—of what is extracted from the earth, and what is staple food by choice, such as grains, dates, and grapes, based on the Almighty's saying: "O you who have believed, spend from the good things which you have earned and from that which We have produced for you from the earth" and "And give its due on the day of its harvest, and do not be extravagant."

If it is irrigated by rain or drinks from its roots, then one-tenth (of its yield) is due. If it is irrigated artificially (with effort and cost), then half of one-tenth is due.

As for vegetables, fruits, and fodder, there is no zakat on them. However, if they are sold and the money reaches the nisab and a year passes over it, then money zakat becomes obligatory on it, which is one-quarter of one-tenth.