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Simulation of Nitrogen Balance in Rice–Wheat Systems of the Indo-Gangetic Plains

^a Unit of Simulation and Informatics, Indian Agricultural Research Inst., New Delhi, India
^b Inst. for the Study of Earth, Oceans, and Space, Univ. of New Hampshire, Durham, NH
^c Inst. for Meteorology and Climate Research, Garmisch-Partenkirchen, Germany
^d International Rice Research Inst., India Office, New Delhi 110 012, India

View larger version (10K): [in a new window]   Fig. 1. Annual fertilizer N consumption in India since 1950.

View larger version (42K): [in a new window]   Fig. 2. Approaches for the upscaling of N dynamics in rice–wheat cropping systems in the Indo-Gangetic Plain using the Denitrification–Decomposition (DNDC) model.

View larger version (76K): [in a new window]   Fig. 3. Spatial distribution of (a) soil organic C (SOC), (b) clay content, (c) pH, and (d) bulk density of soils of the Indo-Gangetic Plain.

View larger version (66K): [in a new window]   Fig. 4. Annual losses through (a) NH3 volatilization, (b) NO3 leaching, (c) denitrification, and (d) uptake of N in the rice–wheat systems of the Indo-Gangetic Plain.