1- Strategic ninth symposium of the armed forces on: "Development and reconstruction of Sinai", from 9-11 March 1991 under the supervision of the military research, Branch Planning. The Ministry of Defense - the Arab Republic of Egypt and I threw research entitled" Land resources in Sinai".
2- Greece, Thesaloniki, June 3 – 7, 2002 "6th International Conference on The Occurrence, Properties and Utilization of natural Zeolites", and the title of joint research is:
" Sorption characteristics of iron and zinc by natural zeolite and bentonite minerals"
3- Meeting (No. 21) of the Saudi Biological Society, "The Natural Resources of the Kingdom of Saudi Arabia, look to the future," King Khalid University - Faculty of Science - Abha. 9-11/4/2002, and the title of joint research is:
"Sand minerals, amorphous aluminosilicates, free iron oxides and nutrient status in Wadi Bishah Basin soils"
4- First symposium of the Saudi Society for Agricultural Sciences, King Saud University, Riyadh. "Towards a sustainable agricultural development" from 5 - 7/2/2002, Riyadh. and the titles of joint researches is:
* " Pedological characteristics of the soils of wadi Bishah in southwestern regions Saudi Arabia. "
* "A comparative study of clay minerals and amorphous materials in different soil units of Wadi Bishah"
* Distribution of salt and moisture in Torri Psamment soils under different soil management operations".