Extended Data Figure 5 : Linear models describing the relationship between NH3 volatilization and nitrogen rate.

From: Pursuing sustainable productivity with millions of smallholder farmers

Extended Data Figure 5

NH3–N volatilization was plotted against nitrogen rate for maize (n = 315), rice (n = 423) and wheat (n = 279) growing seasons, respectively. The red dotted line is the IPCC model35. NC, CC and SC refer to north China, central China and south China, respectively, for maize and wheat production; NC, YR and SC refer to north China, Yangtze River Basin and south China, respectively, for rice production. **P < 0.01.