What is the ruling on estimating the zakah of crops entrusted to the granaries by weight?

Question : He says: What is your opinion, Honorable Shaykh, regarding the situation of many farmers today? They deliver what Allah has provided them from the produce of the land to the silos, and they do not deal in measures, but rather in weight, taking the zakah from it. Is it valid to estimate it by weight? And is the obligation discharged by the amount of zakah they take? I hope the answer will be simple, as the questioner is a layperson.

Answer : It is known that the silos take the crops based on their value. Is that not so? This is what we know: when the government takes it, they give him its value, and at that point the zakah is easy; one calculates how much comes out of this value, which is half of one-tenth. So if the government gives ten thousand to this man whose crops were taken by them, we say: you must pay five hundred, correct? Ten thousand contains five hundred because it is half of one-tenth. And at that point the matter is easy. But some farmers store some of the crops to use as seed for the coming year. Is there zakah on this stored amount? The answer is yes, there is zakah of half of one-tenth if it is watered at a cost. It is estimated as half of one-tenth, either by weight or by measure, and it is given to the poor and the needy, or in a broader term, to those entitled to zakah.