Fig. 6From: Precipitation mediates the temporal dynamics of net primary productivity and precipitation use efficiency in China’s northern and southern forestsThe relationships between net primary productivity (NPP) and environment factors (a), precipitation use efficiency (PUE) and environment factors (b). Environment factors including the annual mean precipitation (AMP), annual mean temperature (AMT), soil organic matter (SOM), soil total nitrogen (STN), soil total phosphorus (STP), soil total kalium (STK), soil available nitrogen (SAN), soil available phosphorus (SAP), and soil available kalium (SAK)Back to article page