International symposium : earth and water ( Annaba 21 – 23 November 2004 ) .
Awareness Day on Desertification: Desertification Conference: Challenges and Issues + exposure (Biskra 17-June-2004).
Water and children Awareness Day (Biskra 22 March 2004).
Study day on on the chronological dating of climate records in North Africa and the hydrological and thermal events (Ouargla March 3, 2004).
Regional workshop on groundwater aquifers: Dynamic and exploitation and modeling by MODFLOW and MT3D codes (Biskra 17-22 September 2003).
International symposium : Oasis , Water and Population, A & B axes (Biskra 22-24 September 2003)
Scientific days of Biotechnology : Microorganisms of industrial interest (Setif 29 - 30 April 2003 ) .
1st days of International Pharmaceutical Biskra (Biskra 05 - 06 March 2003).
study days on expansive soils in the area of in-Amenas (Ouargla 29 -30 October 2002)
International conference: Development of Saharan agriculture as an alternative to exhaustible resources (Biskra 22 - 23 October 2002).
International conference on dune fixation techniques, Koutbane (Taghit 4 - 6 November 2001 ).
First seminar on contribution of solar and wind energy in sustainable development, ENERSOLE (Adrar 30 - 31 October 2001 ).
International seminar on sustainable development in arid and semi-arid ECODEV 2001 (Ghardaia 06 - 08 February 2001).
International Scientific forum : Climate Forecasting and strategic management of water resources in the Maghreb (Adrar 24-26 September 2001).
International seminar on the problemtic of dryland agriculture and reconversion (Sidi Bel Abbes 22 - 24 January 2001 )
International seminar : Sahara and Sustainable Development Area (Biskra 14 -16 November 2000 ).
International course : desertification and sustainble development : case of rangland ( biskra 04 _15 november 2000 )
International seminar : rediscover and reinvent sylviculture in arid areas (Djanet 27 - 29 October 2000 ).
Congress : The contribution of the scientific research and the new technologies in the development and the value enhancement of the arid and semi-arid regions (El-Oued 1-4 october 2000).
1st national seminar on the Drip _ irrigation , SNMB 2000 ( Blida 22 _ 23 May 2000 ) .
Workshop on the the useful and harmful fauna of the date palm and date (Ouargla 22-23 February 2000).
National seminar on agronomy and hydraulic in arid and semi- arid regions ( Ouargla 8-10 november 1999 )
National seminar : salinization (soil salinity) of agricultural land in Algeria (Chlef 01 - 02 June 1999).
First days on camelina sativa research . (Ouargla 25 _27 May 1999 )
International days on the date palm tree ( El _Oued 20 _22 october 1998 )
Seminar on arid regions : retrospectives, stakes and Strategies (Adrar 25-27 April 1998).
Seminar on spatial tools Arzew, 5 - 6 May 1997. CRSTRA / CNTS