http://www.fao.org/3/a-bl990e.pdf
FAO 52 Profiles in Agroecology
Zero Budget Natural Farming (ZBNF), which is a set of farming methods, and also a grassroots peasant movement, has spread to various states in India. It has attained wide success in southern India, especially the southern Indian state of Karnataka where it first evolved. A rough estimation for just Karnataka puts the figure there at around 100,000 farmer families1 , while at the national level, ZBNF leaders claim that numbers could run into millions. This has been achieved without any formal movement organization, paid staff or even a bank account. ZBNF inspires a spirit of volunteerism among its peasant farmer members, who are the main protagonists of the movement.