Responses of ecosystem water use efficiency to spring snow and summer water addition with or without nitrogen addition in a temperate steppe - Fig 6

<p>Dependence of water use efficiency (WUEnep and WUEgep, μmol mmol^-1) on precipitation (natural rainfall + water addition) (A and C) and aboveground net primary production (ANPP) (B and D) in plots with N addition (solid symbols) and without N addition (hollow symbols) across three growing seasons.