Fig. 4
From: Global crop-specific nitrogen fertilization dataset in 1961–2020

Spatial pattern of crop-specific N application rate (kg N per hectare of harvested area) applied by deep placement in the 1960s and 2010s.
From: Global crop-specific nitrogen fertilization dataset in 1961–2020

Spatial pattern of crop-specific N application rate (kg N per hectare of harvested area) applied by deep placement in the 1960s and 2010s.