| ۱ | بررسی اثر کشت برنج بر فرمهای مختلف پتاسیم در خاکهای شالیزاری شمال ایران | شاهین اوستان-حسن توفیقی | پنجمین کنگره علوم خاک ایران | 1375 |
| ۲ | Effect of sodium dodecylbenzene sulfonate (SDBS) on soil aggregate stability | Shahin Oustan | International Conference: Key Concepts of Soil Physics | 2019 |
| ۳ | Efficiency of Humic Acid Extracted from Different Sources for Reduction of Hexavalent Chromium | Shahin Oustan | 6th Congress on Soil and Water Resources with International Participation | 2019 |
| ۴ | Phosphorus Aging Impacts on Sorption-Desorption Features of Lead (Pb) in Soils | Shahin Oustan | 10th International Soil Science Congress on “Environment and Soil Resources Conservation” | 2018 |
| ۵ | Improving soil functions by zeolitic amendments in agricultural lands | Shahin Oustan | 5th Iran International Zeolite Conference | 2018 |
| ۶ | Removal of chromate from aqueous solutions by reduction with nanoscale Fe-Al layered double hydroxide | Shahin Oustan | ICIEM 2016 | 2016 |
| ۷ | Atrazine sorption-desorption properties in some soils of North and North-West of Iran | Shahin Oustan | SAFE-2015 | 2015 |
| ۸ | Removal of heavy metals from a contaminated calcareous soil using oxalic and acetic acids as chelating agents | Shahin Oustan | ICESE-2011 | 2011 |
| ۹ | Sorption of phosphorus at low equilibrium concentrations in some soils of Iran | Shahin Oustan-Hassan Towfighi | 4th International Symposium on Phosphorus Dynamics in the Soil-Plant | 2010 |
| ۱۰ | Potassium fixation as affected by moisture conditions in some soils of Azerbaijan | Shahin Oustan | International Meeting on Soil Fertility, Land Management and Agroclimatology | 2008 |
| ۱۱ | Potassium depletion from paddy soils in north of Iran | Shahin Oustan-Hassan Towfighi | 2th International Rice Research Conference | 2006 |
| ۱۲ | Recovery of added phosphorus as affected by organic matter in some soils of Iran | Shahin Oustan-Hassan Towfighi | Intranational Conference on Environmental Management | 2005 |