Germany: The Bilateral Cooperation Fellowship from DFG (Deutsche Forschungsgemeinschaft) funded Dr. Saha to work as a visiting scientist at the Gottingen University with Prof. Norbert Lamersdorf under the Bioenergie-Regionen stärken (BEST) project. They studied the carbon storage in traditional agroforestry grassland-orchard systems (GOS) in Central Europe. They estimated the carbon storage potential of GOS. Three study sites in Göttingen district were identified and soil, vegetation & necromass samples and necessary allometric data were collected to calculate the carbon stock both in soil and above & belowground vegetation. Soil carbon stocking of GOS were compared to other common agricultural land-use systems in the region, such as rapeseed (Brassica napus), wheat (Triticum aestivum), and pasture fields.
India: Dr. Saha has a long-history of collaboration with India. His doctoral dissertation field research was on the homegarden agroforestry in southern India, where he collaborated with the Kerala Agricultural University. Currently, Dr. Saha is collaborating with Dr. Rupak Goswami of RKMVU, India and working on sustainability of smallholder farms in West Bengal. Dr. Saha has also served as an external Ph.D. committee member of one of the RKMVU students. Together Drs. Saha and Goswami have published four peer-reviewed journal articles.
Mexico: Dr. Saha collaborated with the Instituto De Investigaciones Forestales. University of Veracruzana (UV) (Prof. Patricia N. Castillo) of Mexico and served in the committee of local graduate student Ms. María Guadalupe Álvarez De Anda. Her thesis topic was on carbon capture in Painus patula plantations of Tonalaco, Veracruz, Mexico (“Captura de carbono en plantaciones de Pinus patula Schltdl. et cham en Tonalaco, Veracruz”). Dr. Saha visited University of Veracruzana , Mexico, followed by visit of the Ms. Anda and the Prof. Castilloto Dr. Saha’s lab in the USA. Dr. Saha was also a representative of the North American Mobility Program at UV.
Guatemala: As a Ph.D. student, Dr. Saha was selected by the ‘Coca Cola World Citizenship Program’ for an internship with the Wildlife Conservation Society in Guatemala. He lived and worked in an economically disadvantaged community (Uaxactun, a village deep inside Maya Biosphere Reserve in Petén) with no electricity or fresh water supply. He worked with different workgroups (local organizations, students, and communities) and designed and implemented several conservation and capacity building projects such as Xate (Chamaedorea Spp) seedling production, Cacao-Vanilla intercropping, development of Maya fruit garden (or Jardín Maya), and also organized educational & training workshops on plant propagation, organic farming, and slash & burn reduction.
Costa Rica: In collaboration with CATIE, Costa Rica (Dr. Eduaardo Somarriba), Dr. Saha's graduate student Mr. Stuart Barker conducted his thesis field research on the coffee agroforestry systems of Costa Rica. His thesis topic was "Effects of fertilizer and shade management on nitrogen mineralization and nitrifying bacteria abundance in coffee (Coffea arabica) agroforestry systems in Costa Rica". As part of CATIE collaboration, Dr. Saha also visited the agroforestry field sites (Cacao, Coffee) in Nicaragua.
Africa: African Cherry tree (Prunus africana) has been identified as a medicine source to treat prostate cancer. Supported by the University of Florida and hosted by the World Agroforestry Center, Dr. Saha visited Uganda and and Kenya as a field data collector to identify the locations and distribution of the Prunus africana and explore the possibility of developing a research project on the genetic diversity of the species in East Africa.