2.2 Key Drivers for P Use Efficiency (PUE)
Based on consultation with experts and the previous work studying
drivers of nutrient use (Dinda 2004, Zhang et al. 2015a, Zhang et al.
2015b, Ju et al. 2016, Wu et al. 2018), we considered and examined the
relationships between PUE and multiple potential drivers, including
eight socio-economic drivers and seven agronomic drivers (Table 1, Table
S11).
Table 1 Selected PUE drivers, data sources, and methodology.