NOMAU, Amadu. Evaluation of the Effect of Price Variations of Inorganic Fertilizer on Farmer’s Productivity in Giwa L. G. A of Kaduna State Nigeria. Zaria journal of Educational Studies (ZAJES), [S. l.], v. 18, n. 1, p. 49–56, 2018. Disponível em: https://zarjes.com/ZAJES/article/view/261. Acesso em: 18 oct. 2024.