The paper reviews the performance of the Sudanese agricultural sector over the last three decades (1990 through 2021) and examines the drivers of that performance. Key findings show that the sector’s contribution to gross domestic product was greater during the 1990–1999 period than during the other two decades; agricultural productivity as well was higher in that decade than in the subsequent two decades. The sector has remained a major source of employment and livelihood. During the last decade reviewed (2010–2021), the sector regained its leading position as a generator of foreign currency. Public investment in agriculture and government spending allocated to the sector were lower than in other countries in the region. Political elites have generally lacked commitment to development plans in the sector. Political developments in Sudan have disrupted more recent efforts to revitalize the sector. Climate change, as manifested in rising temperature, declining rainfall, and drought, is a substantial determinant currently affecting the sector. The paper discusses some broad recommendations for improving the performance of the Sudanese agricultural sector.

Several environmental changes have occurred in the Sudan in the past; several are ongoing; and others are projected to happen in the future. The Sudan has witnessed increases in temperature, floods, rainfall variability, and concurrent droughts. In a country where agriculture, which is mainly rainfed, is a major contributor to gross domestic product, foreign exchange earnings, and livelihoods, these changes are especially important, requiring measurement and analysis of their impact. This study not only analyzes the economy-wide impacts of climate change, but also consults national policy plans, strategies, and environmental assessments to identify interventions which may mitigate the effects. We feed climate forcing, water demand, and macro-socioeconomic trends into a modelling suite that includes models for global hydrology, river basin management, water stress, and crop growth, all connected to the International Model for Policy Analysis of Agricultural Commodities and Trade (IMPACT). The outcomes of this part of the modeling suite are annual crop yields and global food prices under various climate change scenarios until 2050. The effects of such changes on production, consumption, macroeconomic indicators, and income distribution are assessed using a single country dynamic Computable General Equilibrium (CGE) model for the Sudan. Additionally, we introduce yield variability into the CGE model based on stochastic projections of crop yields until 2050. The results of the model simulations reveal that, while the projected mean climate changes bring some good news for the Sudan, extreme negative variability costs the Sudan cumulatively between 2018 and 2050 US$ 109.5 billion in total absorption and US$ 105.5 billion in GDP relative to a historical mean climate scenario without climate change.

This new volume provides an authoritative source of information on Sudan's agriculture up to the present. It includes detailed background on agricultural production systems in various regions of the country, as well as an overview of Sudanese vegetation, climate, hydrology, geology and other important agricultural impact systems. Twenty authors with first-hand experience and specialized knowledge of the area have written an important reference for all researchers in this field.