The four universities making the grade are Kasetsart, Chulalongkorn, Mahidol and Chiang Mai.
Kasetsart University is ranked 39th in the world for Agriculture and Forestry, and holds the highest ranking in Thailand for the subject.
Chulalongkorn University is part of the top-100 list for Chemical Engineering, Modern Languages and Architecture/Built Environment. Mahidol University made it to the ranking for excellence in Medicine, while Chiang Mai University was honoured for Agriculture and Forestry.
“These rankings provide institutions a unique opportunity to showcase their strengths that may not be represented in overall rankings,” Ben Sowter, head of research at QS, said.
Since 2011, QS has been extending the scope of world rankings to include the evaluation of 36 individual disciplines. The methodology utilises adaptive weightings for the four criteria and takes into account the difference in disciplines. The rankings are based on research citations, alongside surveys of more than 126,000 academics and graduate employers worldwide.
In 2015, academics nominated 3,551 universities for the QS World University Rankings by Subject and of them only 512 have made it to the top 100 listing on at least one subject.
In addition, just 15 of the institutes have made to the No 1 spot for different subjects.
The Massachusetts Institute of Technology tops the list in 11 subjects, including Physics and Astronomy, and Engineering – Chemical. Harvard University, meanwhile, tops the list in 10 other subjects, including Medicine and Psychology. Oxford University comes in first in two fields, namely Modern Languages and Geography, while Cambridge University tops the list in just one subject – English Language and Literature.