50 year trends in nitrogen use efficiency of world cropping systems: the relationship between yield and nitrogen input to cropland
2014 ◽
Vol 9
(10)
◽
pp. 105011
◽
Keyword(s):
2016 ◽
Vol 104
(1)
◽
pp. 53-66
◽
2018 ◽
Vol 422
◽
pp. 214-222
◽
Keyword(s):
2019 ◽
Keyword(s):
2017 ◽
Vol 12
(2)
◽
Keyword(s):
2014 ◽
Vol 45
(20)
◽
pp. 2621-2635
Keyword(s):
Keyword(s):
2016 ◽
Vol 106
(2)
◽
pp. 143-156
◽
Keyword(s):
2012 ◽
Vol 93
(5)
◽
pp. 1191-1197
◽
Keyword(s):