Responses of ecosystem water use efficiency to spring snow and summer water addition with or without nitrogen addition in a temperate steppe - Fig 3

<p><b>Mean values (means ± SE) of net ecosystem production (NEP, A), gross ecosystem production (GEP, B) and evapotranspiration (ET, C) in 2011, 2012 and 2013.</b> Control (N0W0), spring snow addition (N0W1), summer water addition (N0W2), nitrogen addition (N1W0), spring snow with nitrogen addition (N1W1), summer water with nitrogen addition (N1W2) treatments.