If crops are afflicted by any pest before they ripen, there is no Zakah due on them

Q 1: We live in a desert where we grow agricultural crops such as barley and wheat. These crops may grow weak and as it is impractical to harvest them, we sell them to sheep breeders who make use thereof as they like. How should we pay Zakah (obligatory charity) of those crops? We hopefully wish Your Eminence will clarify the issue for us. A 1: If crops are afflicted by any pest before they ripen, there is no Zakah due on them because the owner does not benefit from them, but if (Part No. 8; Page No. 47

A 1: If crops are afflicted by any pest before they ripen, there is no Zakah due on them because the owner does not benefit from them, but if (Part No. 8; Page No. 47) you sell them for a certain sum of money and a Hawl (one lunar year calculated from the time a property reaches the minimum amount upon which Zakah is due) passes on this amount of money which completes the Nisab (the minimum amount on which Zakah is due), 2.5% would be Wajib (obligatory) as Zakah on this amount.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.