1. Traditional underground grain storage in clay soils in Sudan improved by recent innovations;Abdalla;Tropicultura,2002
2. Assessment of soil organic carbon in semi-arid Sudan using GIS and the CENTURY model;Ardö;J. Arid Environ.,2003
3. Baldy, C., Stigter, C.J., 1997. Agrometeorology of Multiple Cropping in Warm Climates. Science Publ./Oxford and IBH/INRA, Enfield (USA)/New Delhi (India)/Paris, (France), pp. 50–51 (translated from the French 1993 Edition with an epilogue).
4. Relationship between environmental factors, tapping dates, tapping intensity and gum arabic yield of an Acacia senegal plantation in western Sudan;Ballal;J. Arid Environ.,2005
5. The economic linkages between rural poverty and land degradation: some evidence from Africa;Barbier;Agric. Ecosyst. Environ.,2000