Fig. 5.5 Spatial patterns of N input and surplus in 2015 in China. (a) N input, (b) N surplus, (c)
NH 3 emission, (d) NO emission, (e) N 2 O emission, (f) N runoff, (g) N leaching, and (h) N
accumulation. The spatial analysis was based on a 1 km resolution land use map
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B. Gu and X. Zhang