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Net Primary Productivity (NPP) is important parameter in determining ecosystems global warming and assessment of global carbon stocks. NPP of arid and semi-arid region is considerable for carbon cycle research and carbon storage in the Southeast Anatolia Region (SAR). In this study, samples were taken from agricultural areas during 2010-2011 growing seasons. In all a total of 2590 plant samples comprising of 750 triticale, 400 barley, 390 lentils, 600 grassland, 200 corn and 250 cotton were quantified. Average above ground NPP measured as 791.49 g m(-2) yr(-1) (wheat), 325.15 g m(-2) yr(-1) (barley), 199.24 g m(-2) yr(-1) (lentil), 155.04 g m(-2) yr(-1) (grassland), 977.79 g m(-2) year(-1) (cotton) and 2320.76 g m(-2) yr(-1) (corn). Respective values for average below ground NPP were 212.84, 89.32, 56.36, 41.08, 342.23 and 749.35 g m(-2) yr(-1). The ratio of above ground NPP/below ground NPP was different for different species. There was a high correlation between above and below ground NPP. Total NPP was measured as 31.98 Tg (10(12) g) that was 24.99 and 6.99 Tg for above and below ground NPP, respectively. (c) 2012 Friends Science Publishers