SUSTAINABLE NITROGEN MANAGEMENT INDEX: DEFINITION, GLOBAL ASSESSMENT AND POTENTIAL IMPROVEMENTS 01/01/2022 10388741 10.15302/J-FASE-2022458 Frontiers of Agricultural Science and Engineering 2095-7505 0 0 Xin ZHANGYanyu WANGLena SCHULTE-UEBBINGWim DE VRIESTan ZOUEric A. DAVIDSON
Parameterization for global assessment

(a) Using 90 kg•ha -1 •yr -1 N as the reference yield. (b) Using gridded attainable yields as the reference yield. Calculations are performed using gridded data on crop N yield and NUE from the IMAGE model for 2010 [32,33] (spatial resolution is 0.5×0.5 degrees).

Xin ZHANG et al. Sustainable nitrogen management index

Front. Agr. Sci. Eng. 2022, 9(3): 356-365