Ruling 1887
If the weight of wheat, barley, dates, or grapes when they are wet reaches the niṣāb and reduces to below the niṣāb when they become dry, then zakat on them is not obligatory.
-Ayatullah Sistani, Practical Laws of Islam, Alms Tax (Zakat)
Alms Tax: Weight Reducing Below the Nisab After Drying
Practical Laws of Islam as per the teachings of Ayatullah Sistani
