International Journal of Irrigation and Water Management Vol. 7 (8), pp. 001-015, August, 2020. © International Scholars Journals
Full Length Research Paper
Does Irrigation enhance and food deficits discourage fertilizer adoption in a risky environment? Evidence from Tigray, Ethiopia
Gebrehaweria Gebregziabher1, 2* and Stein Holden1
1Department of Economics and Resource Management, Norwegian University of Life Sciences (UMB), P.O. Box 5033, N-1432 Ås, Norway.
2International Water Management Institute, Sub Regional Office for Nile Basin & Eastern Africa, Ethiopia, C/o ILRI-Ethiopia Campus, Wereda 17, Kebele 21, P. O. Box 5689, Addis Ababa, Ethiopia.
Accepted 02 May, 2020
The northern Ethiopian highland in general and the Tigray region in particular is a drought prone area where agricultural production risk is prevalent. Moisture stress is a limiting factor for improved agricultural input mainly fertilizer use. Lack of capital and consumption smoothing mechanisms limits households’ investment in production enhancing agricultural inputs, possibly leading into poverty trap. Using a Cragg (Double Hurdle) model, we analyzed how rainfall risks, access to irrigation and food deficits affect the probability that farm households’ use fertilizer and given that the probability is positive and significant, the amount (intensity) of fertilizer use. Accordingly, we found that households were more likely to use fertilizer and that they used significantly higher amounts of fertilizer on their irrigated plots than on rain-fed plots. Furthermore, households with access to irrigation were more likely to use fertilizer, but the intensity (amount) of fertilizer they used was not significantly different from those households without access to irrigation. In investigating the effect of rainfall risk on fertilizer use, we found that fertilizer use was significantly higher in areas with higher average rainfall and in areas with lower rainfall variability. In general, irrigation was found significantly important for fertilizer adoption mainly in areas with low rainfall and high rainfall variability. Finally, we investigate the effect of food deficit on fertilizer adoption and found that both food self-sufficient and food deficit households were less likely to use fertilizer as coping mechanism. However, among those who decided to adopt, the food deficit households used higher amount of fertilizer than the food self-sufficient.
Keywords: Tigray, irrigation, average rainfall, rainfall variability, food deficit, fertilizer use.