About Thondaimandalam

Thondaimandalam also known as Thondai Nadu is a historical region located in the northernmost part of Tamil Nadu and the southernmost part of Andhra Pradesh. The region includes the Nellore, Chittoor, North and South Arcot and Chingleput districts of the Andhra and Madras states (now in Andhra Pradesh and Tamil Nadu). It covers the present day areas of Nellore, Chittoor, Vellore, Ranipet, Tirupattur, Tiruvanamalai, Villupuram, Kallakuruchi, Tiruvallur, Kanchipuram, Chengalpattu, Cuddalore and Chennai districts of modern-day Andhra Pradesh and Tamil Nadu. The boundaries of Thondaimandalam are between the river basins of Penna river and Ponnaiyar (Then Pennai) river.

This region covers the North Eastern Agro Climatic zone of Tamil Nadu and the Southern Agro Climatic zone of Andhra Pradesh. The soil types are red sandy loam, clay loam, saline coastal-alluvium. The annual rainfall varies from 850mm to 1400mm as one moves towards the coast. Northeast monsoon is the lifeline of this region with the Lake (Eri) system, canals and tanks harvesting most of the rainfall during the monsoon for use over the next 6-8 months. Paddy, sugarcane, groundnuts, sesame and other horticultural plants are predominantly cultivated here. There are several native breeds found in this region such as Thondaimaadu cattle, Madras Red sheep and other native livestock. There is also a high level of urbanisation and industrialization concentrated around the Greater Chennai area and the Vellore-Ranipet stretch.

Board of Trustees

Ananthan Krishnan
Ananthan Krishnan is a farmer who has chosen to walk the path of natural farming with an inclination towards an inclusive and sustainable farming principles.

Himakiran is an organic farmer and strong supporter of local economy, decentralised policy making, sustainable livelihoods & federalism. He promotes organic/natural farming & native livestock based livelihoods.

Parthasarathy VM
Parthasarathy VM is an organic farmer based out of Pandeswaram, Thiruvallur District. He has been working on improving agriculture, livelihood and education standards in the region.


Rathnavel Pandian
Capacity Building and Research
Rathnavel is a researcher focused on rural livelihoods, biodiversity conservation and ecology, with a Master's degree in Ecology and Evolutionary Biology from University at Buffalo, USA.

Srinivasan Deenadaylan
Field Coordinator 

Srinivasan is an organic farmer, bridging between consumers and producers, and coordinating activities on field. He also works on inclusion initiatives for kids with autism spectrum disorders.

Ganapathi Thamizhselvan

Ganapathi Thamizhselvan is an organic farmer in Thiruppukuzhi, Kancheepuram district. He is a seed conservator, actively managing the native paddy varieties seed conservation project.

12AA Exemption – Reg No: CIT (Exemption), Chennai/12AA/2020-21/A/11311
IT 80G Exemption - URN: AADTT6457FF20206 dt 09.07.2021
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