Castillo, Gelia T. (+)
Ph. D. Rural Sociology
Mathematical and Physical Sciences
National Scientist
Dr. Castillo's publications are major and definitive works on Philippine agricultural and rural development. Her book All in a Grain of Rice is the first book written by a Filipino about the Filipino farmer's response to new technology. Another book, Beyond Manila, has been cited as in-depth and analytical study of the actual problems and needs of the rural areas in relation to countryside development. The totality of Dr. Castillo's research undertakings has given us much needed insights on our own rural development effort and our attempt to reach the farmer and the rural poor.

As an outstanding rural sociologist, Dr. Castillo is recognized internationally. For her contribution as a social scientist, she was presented the Rizal Pro Patria Award (1976), Distinguished Alumnus Award of the UP Alumni Association (1975) and the Distinguished Alumnus Award of the UP College of Agriculture (1979).
 
Birtdate: 27 July 1928
Died: 5 August 2017