DEVAKUMAR, A. S.PARDIS2017-07-142017-07-142014-02-15Th-10727http://krishikosh.egranth.ac.in/handle/1/5810025258One of the biggest challenges of the twenty first century is global climate change, which is due to increase in the G H G ’s (green house gases) concentration in the atmosphere. Agriculture is one of the most important causes o f global warming. It contribute both by decreasing carbon sink in the form of clearing forest and also acts as source by consuming products which are o f fossil origin. In order to contemplate measures to reduce carbon emission from agriculture sector, a clear knowledge o f sources that contribute for emission is a fundamental requirement. In this direction the present study is conducted. occurring from the agriculture sectors o f Karnataka, India and Afghanistan respectively. This is relatively less compared to other countries like China and Canada. The reason for such low values is less use of fossil fuel in farm operations in Karnataka and Afghanistan. Among the fossil fuel based inputs used in, inorganic nitrogenous fertilizers contribute 72 and 76% respectively in these two agriculture systems. In Karnataka crops grown under irrigated system release more carbon equivalents compared to unirrigated agriculture and among the two major cropping seasons Kharif season’s carbon foot print is more than Rabi crops. Among the major crops studied, carbon foot print of Paddy was found to be highest and least was in case of Bajra. The sustainability o f current system of agricultural practices of in terms of input to output ratios for all the crops studied was good except for Sunflower grown under unirrigated conditions. This can be further enhances if the soil conditions are improved further by following the recommended cultivation practices. Even though the carbon foot print of Paddy is least compared to other countries, there are possibilities reduce further by adopting aerobic system of cultivation. It was found that about 5.90 and 0.85 TgCE/year isennullThesis