This study estimated GHG emissions from agriculture, mobile founts and industrial sectors associated to maize and maize production activities in Nokhon Ratchsima province (Fig.1) during the 2012 cropping year and area of all crops cultivation 767,761 rais. We study 3 districts because it is high density of planted area. Pak Chong district covered 27%, Dan Khun Thot covered 16% and Non Thai covered 3% of the total planted area in Nakhon Ratchasima province (Fig.1).