Although the voucher system is a small-scale project with an initial FAO budget of $17m, Mr Diouf said it had the potential to increase crop production in poor countries by up to 20 per cent.

• 尽管这个优惠券制度只是一个小规模项目，联合国粮农组织对其最初预算只有1700万美元，但迪乌夫表示，它有可能让贫困国家的粮食产量提高至多20%25。