How is Zakat to be paid on leased land in Pakistan (5000 square meters) with a rent of 400 kilograms of grain from the land's yield? Is it to be paid from the value of the rent, and by the tenant or by the landlord?

Renting land for a specific rent from its yield is impermissible due to the unknown nature of the rent, which leads to the invalidation of the contract, unless it is not stipulated that the rent must be from its yield. Thus, the aforementioned contract is invalid, and the lessor is entitled to the fair rental value of his land. There is no zakat on the land itself, but zakat is obligatory on what is produced from it for the tenant, and it includes the entire crop without deducting the rental value.