**Author details**

Charles S. Wortmann1 \*, Anthony O. Esilaba2 , Kayuki C. Kaizzi3 , Catherine Kibunja4 , Keziah W. Ndungu-Magiroi<sup>5</sup> and Nouri Maman6

1 Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, USA

2 Kenya Agriculture and Livestock Research Institute, Nairobi, Kenya

3 National Agricultural Research Laboratories, Kampala, Uganda

4 Kenya Agricultural and Livestock Research Organization (KALRO)-Kabete, Nairobi, Kenya

5 KALRO-Kitale, Kitale, Kenya

6 Institut National de Recherche Agronomique du Niger (INRAN), Maradi, Niger

\*Address all correspondence to: cwortmann2@unl.edu

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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*Fertilizer Use Issues for Smallholder Agriculture in Tropical Africa*

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[10] Senkoro CJ, Marandu AE, Ley GJ, Wortmann CS. Maize and pigeon pea sole crop and intercrop nutrient response functions for Tanzania. Nutrient Cycling in Agroecosystems. Mexico, DF: The International Maize and Wheat Improvement Center; 2017;**109**:303-314. DOI: 10.1007/

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