Factors Influencing the Profitability of Fertilizer Use on Maize in Zambia

By Zhiying Xu, Zhengfei Guan, T. Jayne, J. Black. 2009

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Climate Smart Agriculture? Assessing the Adaptation Implications in Zambia (2015, background): “Timely access to fertiliser is an important determinant of whether farmers can realise full yield benefits from fertiliser use as well as from other practices, and has been found to increase yields significantly (Rockstr€om et al., 2009; Xu et al., 2009).”
Maize Revolutions in Sub-Saharan Africa (2011, background): “92 kg to the amount of fertilizer used by farmers (Xu et al. 2009).”
Limits to Green Revolution in rice in Africa: The case of Ghana (2017, methodology): “Despite some criticism regarding the quadratic or higher-order polynomial functional form (Grimm, Paris, and Williams 1987), we adopt this functional form because it permits 0 inputs and concavity in the yield response curves, a process that is more consistent with most biological relationships (She”