If some grains are stored in their husks, how is their nisab (minimum threshold for zakah) calculated?

Question : He says: If some grains are stored in their husks, and if the husks are removed they will not last long, then one looks at this husk to see if it equals half. If it is said, yes, it equals half, what is its nisab?

Answer : It is ten wasqs, because the nisab of pure grain is five, and this is its nisab: ten. If they say it equals less than half, for example a quarter, then its nisab is seven and a half. And so the description follows. Because some grains must remain in their husks. As for the individual, if it remains in its husk, its duration is extended. For this reason, Yusuf (peace be upon him) guided the king who saw the cause of the fatness: they would be fat, dry, and seven ears of green and others dry. He ordered them to keep them in their ears so that they are not separated. Yes.