Assessment of Soil Organic Carbon (SOC) Stock in Different Agro-Climatic Zones of Tamil Nadu

Soil map prepared on 1:50,000 scale for natural resources information system (NRIS) employing satellite data (IRS-1C/1D-PAN sharpened LISS-III image) was used to estimate SOC stock upto 50 cm depth in different agroclimatic zones of Tamil Nadu. Among different agroclimatic zones of Tamil Nadu, hilly zone registered the highest SOC stock followed by north eastern, southern, western, cauvery delta, north western and high rainfall zone. SOC density was higher in high rainfall and hilly zone than other agroclimatic zones of Tamil Nadu. Among low rainfall regions, cauvery delta zone recorded higher SOC density.