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Elagib, Nadir Ahmed, Khalifa, Muhammad ORCID: 0000-0002-3100-9353, Rahma, Abbas E., Babker, Zryab and Gamaledin, Suad Ibrahim (2019). Performance of major mechanized rainfed agricultural production in Sudan: Sorghum vulnerability and resilience to climate since 1970. Agric. For. Meteorol., 276. AMSTERDAM: ELSEVIER. ISSN 1873-2240

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Abstract

Food security in the African Sahel has frequently been threatened by climate variability and change. A large part of the farming system in the arid and semi-arid region of Sudan is heavily rainfed, with sorghum representing the major crop. This study sheds light on the performance of sorghum production in the major mechanized sector in Sudan since 1970. Despite a significant extensification of the mechanized cultivated area of sorghum, a drastic loss of area at harvest took place during 1970-2016. The sorghum production showed both increases and decreases in the average over time besides high year-to-year variability. Synchronous with the above findings, a significant steady decline of sorghum yield occurred from the 1970s level (744.3 kg/ha) to 476.6 kg/ha since 1982. Based on the ratio of growing season precipitation to reference evapotranspiration, a Standardized Multi-Criteria Drought Index (SMCDI) for the period 1941-2015 was introduced using three drought characteristics, namely drought severity, dry spell and time relative frequency of drought. There occurred 23 mild to extreme droughts and 17 mild to extreme wet cases over the period 1970-2015. Aggregation of the SMCDI with 'climatic' sorghum yield revealed highly variable performance of this crop. Accordingly, 26 vulnerable and 20 resilient sorghum yield years were discernible under drought, near normal or wet conditions due to a combination of factors not only climate, i.e. physio-geographic, socio-economic and institutional factors. Apart from the regional analysis, one representative state was also selected for further in-depth spatio-temporal assessment of the SMCDI, integrated Normalized Difference Vegetation Index (iNDVI), Modified Vegetation Condition Index (MVCI), sorghum yield, precipitation and reference evapotranspiration data over the period 2001-2014. The results also underscored the spatio-temporal and local-scale vulnerability of the farming system under study to climate variability. Such findings urge for interventions in the mechanized rainfed sorghum farming system to enable improvement of its performance, drought vulnerability reduction, development of alternatives, and achievement of food security.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Elagib, Nadir Ahmed UNSPECIFIED UNSPECIFIED UNSPECIFIED Khalifa, Muhammad UNSPECIFIED orcid.org/0000-0002-3100-9353 UNSPECIFIED Rahma, Abbas E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Babker, Zryab UNSPECIFIED UNSPECIFIED UNSPECIFIED Gamaledin, Suad Ibrahim UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-130849
DOI:	10.1016/j.agrformet.2019.107640
Journal or Publication Title:	Agric. For. Meteorol.
Volume:	276
Date:	2019
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1873-2240
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FOOD SECURITY; GADARIF REGION; DROUGHT RISK; FED AREAS; YIELD; WATER; LAND; VEGETATION; IMPACTS; POLICIES Multiple languages Agronomy; Forestry; Meteorology & Atmospheric Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13084