INTERNATIONAL

• Armenia. International Symposium on Melioration of Soda Salinized Soils.

• "Soils of soda salinization of the Ararat plain and methods of their development". G. Petrosyan, A. Ch. Itchyan, Yerevan, May, 1969

• Spain: "International meeting on the development of soda-saline soils", Seville, May 6-23, 1971

• Egypt: International Symposium on Saline Soils.

• "Influence of chemical reclamation on the physical and water-physical properties of soda-saline soils of the Araks lowland". G.Petrosyan, Z.Avunjyan, Cairo, 1972, head of the delegation

• Czechoslovakia: Anniversary conference of the NTO of agriculture in Czechoslovakia.

• "Some issues of the development of soda solonchaks of the Araks lowland". G. Petrosyan, Prague, March, 1973

• Hungary: International Conference on Thermal Analysis. G. Petrosyan, M. Aranbaev, F. Grigoryan, Budapest, 1974

• Czechoslovakia: International Symposium "Etudes in Humus".

• "Comparative characteristics of humus in high-mountain soils of the Armenian highlands and the Pamirs". G. Petrosyan, M. Aran6aev, L. Iskandaryan, S. Khailov, Prague, 1975

• Bulgaria: Report "Use of spent sulfuric acid for melioration of soils with soda salinity". 19/03/1975, Sofia

• Armenia: International Symposium on Apricot Culture.

• "On the cultivation of apricot culture on reclaimed soda solonetzes-salt marshes of the Ararat plain". G. Petrosyan, V. Tarverdyan, Yerevan, 1974

• USA: International Conference on the Use of Reclaimed Water for Irrigation. "Chemical reclamation of solonetzes-salt marshes of the Ararat Plain and the possibility of using mineralized waters for flushing and irrigation". G. Petrosyan, Texas, Lubbock, 1977

• Canada: XI International Congress of Soil Scientists.

• "Technology and economic indicators of chemical reclamation of soda solonetzes-salt marshes of the Ararat Plain of the Armenian SSR", G. Petrosyan, Canada, Edmonton, 1978

• Italy: Meeting of the FAO Expert Council on the "problem of secondary salinization".

• "Problems of melioration of solonetzes-salt marshes of the Ararat plain and issues of secondary salinization of soils". G. Petrosyan, Rome, December 1977

• Armenia: Ninth CMEA meeting of authorized CMEA member countries on the issue of "Development of requirements for new complex and other mineral fertilizers, methods for their effective use and study of the effect on soil fertility during their long-term use."

• "The main directions of scientific research in the field of chemicalization of agriculture in the Armenian SSR and the issues of chemical reclamation of soda-saline soils of the Ararat plain". G. Petrosyan, Yerevan, June 4-10, 1978

• Libya: General Assembly of the International Center for Mineral Fertilizers. Application of water and fertilizers in semi-arid conditions.

• "On the Possibility of Using Mineralized Waters for Washing and Irrigation". Benrazi, 1979

• India: International Symposium - "Principles and practice of salinized soils".

• “Chemical composition and quality of wines depending on the content of sodium ions in the reclaimed salt marsh.” G. Petrosyan, R. Sahakyan

• “Peculiarities of Salt Inhibition and Grapevine Metabolism Depending on the Sodium Ion Content”. G. Petrosyan. Karnal, February 18-24, 1980.

• GDR: International scientific session dedicated to the 20th anniversary of the Melioration and Engineering Faculty of the University of Rostock.

• "Influence of reclamation measures on increasing the productivity of soils in Armenia", 28-30.08.1982

• India: XII International Congress of Soil Scientists "

• Development of soda solonetzes-salt marshes by local reclamation in the places of planting grapes and fruit trees.  Delhi, February 8-16, 1982

• China: International Symposium on Reclamation of Salt Soils "Express Method for Reclamation of Soda-Saline Solonetzes". Beijing, 09-23 May 1985

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ALL-UNION

• Conference on the physiological resistance of plants.

• "Growing of a grapevine and some fruitful cultures in the conditions of soda salinization of the Araks valley". G. Petrosyan, Moscow, 1960

• All-Union Conference on Salt Tolerance  plants

• "Carbohydrate exchange of grapes in conditions of soil salinization". R. Sahakyan, G. Petrosyan.

• "Some biochemical features of adaptation of perennial crops to soil salinization". G. Petrosyan, R. Sahakyan, L. Apoyan, S. Khizantsyan, Tashkent, 1973.

• 3rd All-Union Conference on the Physiology and Biochemistry of Plant Salt Tolerance.

• "Influence of excess soil salts on the chemical composition and quality of grapes and wines". G. Petrosyan, R. Sahakyan, L. Apoyan, S. Khizantsyan, Alma-Ata, 1974

• All-Union scientific conference on the provision of agriculture with measuring and control instruments, devices and laboratory equipment, the development of metrology in agriculture.

• "Small Mechanization and Big Problems". G. Petrosyan, Moscow, 1975

• Coordination meeting on melioration of solonetzes of the Ministry of Agriculture of the USSR.

• "Experience of chemical melioration of soda-saline soils of Armenia". G. Petrosyan, Yerevan, 06/25/1975

• All-Union Scientific Conference. - Techniques and methods for improving the amelioration of solonetzes.

• "Economic efficiency of amelioration of saline soils for intensive crops in conditions of land shortage in the Transcaucasian republics". G. Petrosyan, B. Agaev, V. Chkhikvikshvili, F. Mamedov, Rostov-on-Don, 1976

• V Delegate Congress of the All-Union Society of Soil Scientists.

• "The possibility of using the mineralized waters of the Ararat Plain: the Armenian SSR for flushing and irrigation". G. Petrosyan, Minsk, 1977

• All-Union Interuniversity Conference - Microorganisms in agriculture.

• "Changes in the biological activity of solonchaks during their development". G. Petrosyan, L. Khachikyan, Moscow, 1978

• Coordination meeting "Soil reclamation problems and ways to increase the fertility of irrigated lands in the south  Ukrainian SSR".

• "Rational use of reclaimed soils of the Ararat Plain"

• VI Congress of the All-Union Microbiological Society. Microorganisms and agricultural productivity.

• "Microbiological activity of reclaimed solonetzes-salt marshes of Armenia. G. Petrosyan, L. Khachikyan. Riga, 1980

• All-Union scientific and technical conference - "Theoretical foundations and experience of reclamation processing and chemical reclamation of solonetzic soils".

• "Perspective technology and a new set of machines for the amelioration of solonetz-saline soils", K. Alexandryan, G. Petrosyan, O. Pshtimaldan, Tselinograd, 1980

• All-Union Coordination Conference - "To develop optimal land reclamation systems for various zones of the country and areas of farms."

• "Improving the fertility of reclaimed soils". G. Petrosyan, Tashkent, June, 1980

• All-Union NT Conference. Tasks of further improvement of land management in the conditions of intensification of agricultural production.

• "Ways for Further Increasing Land Productivity in the Armenian SSR". Yerevan, September 22-24, 1981

• All-Union scientific and technical conference on the issue of "Progressive methods of melioration and development of heavy saline lands".

• "Experience of melioration of soda-saline solonetzic soils of Armenia". G. Petrosyan, April 21-23, 1981, Baku

• All-Union School of Young Scientists and Specialists on Topical Issues of Theory and Practice of Increasing Soil Fertility.

• "On the main results of research on the chemical reclamation of saline soils in Armenia, Noorus, Estonian SSR, May 15-22, 1981.

• All-Union Conference "Problems and Ways of Increasing Plant Resistance to Diseases and Extreme Environmental Conditions in Connection with Breeding Tasks".

• "Changes in some physiological and biochemical parameters of fruit crops on reclaimed solonetzes-salt marshes of the Ararat Plain".

• "Peculiarities of grapevine metabolism on reclaimed solonetzes-salt marshes of the Ararat Plain, Leningrad, 1981

• VI Congress of the All-Union Society of Soil Scientists, leader of the symposium "Soils of intermountain depressions and their use".

• "Soils of the Ararat intermountain plain and improvement of their use", Report to the VI Commission "Influence of the size of leaching checks on the quality of chemical reclamation of solonetzes-salt marshes". September 16-20, 1981, Tbilisi.

• Scientific and technical conference "Actual issues of agriculture in the light of the decisions of the XXVI s.CPSU" Report: "Experience of ameliorative development of the soils of Armenia", Kursk, June 29 - July 2, 1982

• All-Union Scientific and Technical Conference "Culture of production in the conditions of industrialization of agriculture", Jurmala, September 21-23, 1982

• Topic of the report: "Introduction of achievements of science and advanced experience - an important factor in improving the culture of production."

• All-Union Conference on the Application of Mathematical Methods and Computers in Soil Science.

• "Information retrieval system for regime observations on SM-computer"

• "Evaluation of the spatial variation of the properties of solonetzes-saline marshes of the Ararat plain with the help of a computer, November 17-19, 1983, Pushchino.

• All-Union Conference on Land Reclamation, Hydrogeology, Engineering Geology and Ameliorative Soil Science. ''Drainage Efficiency Criteria in Chemical Melioration and Agricultural Development of Soda Solonetzes-Saline Marsh of the Ararat Plain", September 18-21, 1984, Novaya Kakhovka.

• VII Congress of the All-Union Society of Soil Scientists. "Regulation of the salt regime of reclaimed soils with a high level of standing groundwater".

• "Productivity of agricultural crops cultivated on reclaimed solonchaks depending on indicators of soil fertility", September 09-13, 1985, Tashkent.

• All-Union scientific and technical conference "Ways to increase the productivity of solonetzic: lands",

• "Reclamation ensuring high productivity of solonetzes-salt marshes", June 30 - July 4, 1986, Novosi6irsk

• Delegate Congress of Soil Scientists of the Ukrainian SSR. "Recoupment of investments in the chemical reclamation of solonetzes-salt marshes", November 11-14, 1986 Kharkov.

• All-Union Conference "Physiological and Biochemical Basis of Salt Tolerance of Plants".

• "Adaptive possibilities of the vine cultivated on reclaimed solonetzes-salt marshes", October 8-10, 1986, Tashkent.

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TRANSCAUCASUS

• Joint scientific session of Georgia, Azerbaijan and Armenia.

• "The nature of the growth of the root system of the vine, depending on the degree of salinity of the soil and the level of standing groundwater." G. Petrosyan, Yerevan, 1958

• Transcaucasian scientific session.

• "Cultivation of grapevine and other fruit trees on other soils in the conditions of the Oktemberyan region of the Armenian SSR". G. Petrosyan, Kirovabad, 1959.

• Transcaucasian scientific session on large-scale soil and agrochemical mapping. "Rational use of land resources of the Armenian SSR", G. Petrosyan, Yerevan, 1965

• Scientific conference dedicated to the 30th anniversary of the Research Institute of Soil Science, Agrochemistry and Land Reclamation of the Ministry of Agriculture of the Georgian SSR.

• "Chemical reclamation of soda-saline soils of the Ararat plain", G. Petrosyan, Tbilisi, 1976

• Transcaucasian Scientific and Technical Conference. Problems of scientific and technological progress in the agriculture of Transcaucasia.

• "Intensification of scientific research", G. Petrosyan, Kirova6ad, 1977

• V-th meeting of agricultural chemists of Transcaucasia.

• "Influence of ameliorative state of the soil on the effectiveness of nitrogen fertilizers for winter wheat", G. Petrosyan, S. Arazyan. Tbilisi, 1980

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ARMENIA

• Scientific conference on the technology of growing grapes on a high stem in the conditions of the Armenian SSR, September 27-28, 1982 Report: , G. Petrosyan,  Sahakyan

• "Cultivation of frost-resistant varieties of grapes on a high stem in conditions of reclaimed solonetzes-salt marshes"

• Scientific conference on the issues of increasing feed production in the republic. 09/30/1982

•   Report: "Fodder production on reclaimed salt marshes"