Rice Acreage Estimation in Thanjavur, Tamil Nadu Using Lands at 8 OLIIMAGES and GIS Techniques

Rice (Oryza sativa L.) is one of the most important food crops in the world occupying about 140 million hectares, feeding more than 50% of the world’s population (Khush, 2005). Asia accounts for 90% of the world’s rice production and consumption because of its favourable hot and humid climate. Rice crop grows between 55 0 N and 36 0 S latitudes under diverse conditions like flooded, irrigated and rain fed ecosystems. India contributed 21 per cent (155.4 million tonnes) of world’s rice production (738.2 million tonnes) during 2015 (FAO, 2016). Tamil Nadu has produced 79.14 lakh tonnes of rice from an area of 18.3 lakh hectares in 2014-15 (Vaithilingam, 2015). Timely and accurate estimation of rice areas and forecasting its production can provide vital information for governments, planners, and decision makers in formulating policies with respect to import/ export in the event of shortfall or surplus (Mostafa, 2015). Rice mapping during 1980s to early 1990s was mainly based on agricultural statistical data updated on regular time-intervals (Huke International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 6 Number 7 (2017) pp. 2327-2335 Journal homepage: http://www.ijcmas.com

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