Tags

Type your tag names separated by a space and hit enter

Spatial variation in fertilizer prices in Sub-Saharan Africa.
PLoS One 2020; 15(1):e0227764Plos

Abstract

Low crop yields in Sub-Saharan Africa are associated with low fertilizer use. To better understand patterns of, and opportunities for, fertilizer use, location specific fertilizer price data may be relevant. We compiled local market price data for urea fertilizer, a source of inorganic nitrogen, in 1729 locations in eighteen countries in two regions (West and East Africa) from 2010-2018 to understand patterns in the spatial variation in fertilizer prices. The average national price was lowest in Ghana (0.80 USD kg-1), Kenya (0.97 USD kg-1), and Nigeria (0.99 USD kg-1). Urea was most expensive in three landlocked countries (Burundi: 1.51, Uganda: 1.49, and Burkina Faso: 1.49 USD kg-1). Our study uncovers considerable spatial variation in fertilizer prices within African countries. We show that in many countries this variation can be predicted for unsampled locations by fitting models of prices as a function of longitude, latitude, and additional predictor variables that capture aspects of market access, demand and environmental conditions. Predicted within-country urea price variation (as a fraction of the median price) was particularly high in Kenya (0.77-1.12), Nigeria (0.83-1.34), Senegal (0.73-1.40), Tanzania (0.90-1.29) and Uganda (0.93-1.30), but much lower in Burkina Faso (0.96-1.04), Burundi (0.95-1.05), and Togo (0.94-1.05). The correlation coefficient of the country level models was between 0.17 to 0.83 (mean 0.52) and the RMSE varies from 0.005 to 0.188 (mean 0.095). In 10 countries, predictions were at least 25% better than a null-model that assumes no spatial variation. Our work indicates new opportunities for incorporating spatial variation in prices into efforts to understand the profitability of agricultural technologies across rural areas in Sub-Saharan Africa.

Authors+Show Affiliations

Department of Environmental Science and Policy, University of California, Davis, California, United States of America.International Maize and Wheat Improvement Center (CIMMYT), Nairobi, Kenya.International Food Policy Research Institute (IFPRI), Washington, DC, United States of America.Department of Environmental Science and Policy, University of California, Davis, California, United States of America.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31935246

Citation

Bonilla Cedrez, Camila, et al. "Spatial Variation in Fertilizer Prices in Sub-Saharan Africa." PloS One, vol. 15, no. 1, 2020, pp. e0227764.
Bonilla Cedrez C, Chamberlin J, Guo Z, et al. Spatial variation in fertilizer prices in Sub-Saharan Africa. PLoS ONE. 2020;15(1):e0227764.
Bonilla Cedrez, C., Chamberlin, J., Guo, Z., & Hijmans, R. J. (2020). Spatial variation in fertilizer prices in Sub-Saharan Africa. PloS One, 15(1), pp. e0227764. doi:10.1371/journal.pone.0227764.
Bonilla Cedrez C, et al. Spatial Variation in Fertilizer Prices in Sub-Saharan Africa. PLoS ONE. 2020;15(1):e0227764. PubMed PMID: 31935246.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Spatial variation in fertilizer prices in Sub-Saharan Africa. AU - Bonilla Cedrez,Camila, AU - Chamberlin,Jordan, AU - Guo,Zhe, AU - Hijmans,Robert J, Y1 - 2020/01/14/ PY - 2019/07/11/received PY - 2019/12/27/accepted PY - 2020/1/15/entrez PY - 2020/1/15/pubmed PY - 2020/1/15/medline SP - e0227764 EP - e0227764 JF - PloS one JO - PLoS ONE VL - 15 IS - 1 N2 - Low crop yields in Sub-Saharan Africa are associated with low fertilizer use. To better understand patterns of, and opportunities for, fertilizer use, location specific fertilizer price data may be relevant. We compiled local market price data for urea fertilizer, a source of inorganic nitrogen, in 1729 locations in eighteen countries in two regions (West and East Africa) from 2010-2018 to understand patterns in the spatial variation in fertilizer prices. The average national price was lowest in Ghana (0.80 USD kg-1), Kenya (0.97 USD kg-1), and Nigeria (0.99 USD kg-1). Urea was most expensive in three landlocked countries (Burundi: 1.51, Uganda: 1.49, and Burkina Faso: 1.49 USD kg-1). Our study uncovers considerable spatial variation in fertilizer prices within African countries. We show that in many countries this variation can be predicted for unsampled locations by fitting models of prices as a function of longitude, latitude, and additional predictor variables that capture aspects of market access, demand and environmental conditions. Predicted within-country urea price variation (as a fraction of the median price) was particularly high in Kenya (0.77-1.12), Nigeria (0.83-1.34), Senegal (0.73-1.40), Tanzania (0.90-1.29) and Uganda (0.93-1.30), but much lower in Burkina Faso (0.96-1.04), Burundi (0.95-1.05), and Togo (0.94-1.05). The correlation coefficient of the country level models was between 0.17 to 0.83 (mean 0.52) and the RMSE varies from 0.005 to 0.188 (mean 0.095). In 10 countries, predictions were at least 25% better than a null-model that assumes no spatial variation. Our work indicates new opportunities for incorporating spatial variation in prices into efforts to understand the profitability of agricultural technologies across rural areas in Sub-Saharan Africa. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/31935246/Spatial_variation_in_fertilizer_prices_in_Sub-Saharan_Africa L2 - http://dx.plos.org/10.1371/journal.pone.0227764 DB - PRIME DP - Unbound Medicine ER -