Evaluation of four special initiatives of the Ministry of Food and Agriculture, Government of Ghana: Fertilizer subsidy agricultural mechanization block farms and youth in agriculture National Buffer Stock Company (NAFCO) - Benin, Samuel; Johnson, Michael E.; Jimah, Kipo; Taabazuing, Joe; Tenga, Albert; Abokyi, Emmanuel; Nasser, Gamel; Ahorbo, Gerald; Owusu, Victor (Ministry of Agriculture, Government of Ghana, 2012)