50 year trends in nitrogen use efficiency of world cropping systems: the relationship between yield and nitrogen input to cropland

Title
50 year trends in nitrogen use efficiency of world cropping systems: the relationship between yield and nitrogen input to cropland
Authors
Keywords
-
Journal
Environmental Research Letters
Volume 9, Issue 10, Pages 105011
Publisher
IOP Publishing
Online
2014-10-27
DOI
10.1088/1748-9326/9/10/105011

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