Does the farmer bear the sin of usury occurring between the bank and the fund in financing the agricultural support project, or is he not involved in it, and is he obliged to abandon the project if he bears the sin?

Since the farmer receives this project from the state as a grant, and is not a party to the financing process between the fund and the bank, there is no harm for him in benefiting from the project. This is because he takes it as a gift and has not dealt with usury. Even if the financing between the bank and the fund were unlawful, the sin would fall upon those who contracted or consented to the unlawful contract. The fund that borrows with usury owns the loan and has the right to dispose of it. So, if it gifts it to someone, there is no harm for them in taking it and benefiting from it.