G Nammalvar (or Nammazhwar) : (1938 – 2013) was an Indian organic farming scientist. Hailing from the agro-based Thanjavur district of Tamil Nadu, he was involved in preaching the farmers to get an edge in organic farming.
Nammazhlwar was born in 1938 in Elangadu, Thanjavur District, and he graduated from Annamalai University with a BSc degree in Agriculture. In 1963, he began working for the Agricultural Regional Research Station, a government organisation in Kovilpatti, as a scientist, conducting trials on spacing and manure levels of various chemical fertilisers in cotton and millet crops. During his tenure there, the government had conducted various experiments in rain fed land, using expensive inputs like hybrid seeds, chemical fertilisers and chemical pesticides which Nammazhwar considered futile as the rain fed farmers were resource poor. Based on his experience, he felt very strongly that it was imperative to totally reorient the research work being undertaken. But his peers at the institute paid little attention to his advice. Frustrated, he left the institute in 1969.