Agriculture Minister Sharad Pawar presented the 'Degree of Doctor of Science (Honoris Causa)' to the Prime Minister at 50th Convocation of IARI here.
Being the country's premier national institute for agricultural research, education and extension, it is said that the "Green Revolution" was born in the fields of IARI.
The citation recognises the Prime Minister's illustrious academic career and his contributions to development of the farm sector in the country.
"In his political and professional career, Manmohan Singh has always worked for the welfare of Indian farming community," the citation said.
Policy interventions to increase the farmers' access to institutional credit, promotion of agricultural investment and technology, strategic partnership in research and development with the developed countries, trade reforms and special packages for agriculture have all directly benefitted Indian farmers and promoted inclusive growth, it added.
"His seminal contributions to the country's economy have enabled India to emerge as a global leader," it said.
Singh, who has been recipient of many awards and honours, was elected fellow of the National Academy of Agricultural Sciences in 1999.