“…Besides environmental factors highlighted in previous analysis, also other factors may modify N 2 O emission (Albanito et al, 2017;Gerber et al, 2016;Liu et al, 2017;Rashti et al, 2015;Stehfest & Bouwman, 2006;Zhou et al, 2015Zhou et al, , 2017 and thus influence our results. For example, soil N 2 O emissions usually vary significantly with agricultural managements, such as fertilizer type (Burton, Li, & Grant, 2008;Gao, Asgedom, Tenuta, & Flaten, 2015;Lebender, Senbayram, Lammel, & Kuhlmann, 2014;Zhou et al, 2017), application mode and time (Burton, Zebarth, Gillam, & MacLeod, 2008;Halvorson & Del Grosso, 2013;Tenuta, Gao, Flaten, & Amiro, 2016), crop type (Gerber et al, 2016), irrigation pattern (Han et al, 2017; S anchez-Mart ın, Arce, Benito, Garcia-Torres, & Vallejo, 2008), and tillage practice (Liu, Mosier, Halvorson, & Zhang, 2005).…”