Farmer field survey dataset underpinning 'Data-driven strategies to improve nitrogen use efficiency of rice farming in South Asia'.

This database integrates farmer field surveys with secondary environmental data for 45,643 farmer fields that cultivated rice between 2016 and 2021. This dataset integrates original survey datasets that have, or will be, published on the CIMMYT Dataverse. Collectively, the dataset covers six regions across South Asia: Andhra Pradesh (n=1,744), Bihar and eastern Uttar Pradesh (n=9,693), Odisha (n=1,947), Punjab and Haryana (n=5,833), Bangladesh’s floodplains (n=20,329), and the Terai region of Nepal (n=6,097). The northwestern Indian states of Punjab and Haryana are grouped together as they are commonly considered part of a distinct rice-producing area known as the ‘Trans-Gangetic Plains’. Similarly, Bihar and the neighbouring districts of eastern Uttar Pradesh—Ballia, Chandauli, Deoria, Ghazipur, Gorakhpur, Kushinagar, Maharajganj, Mau, and Siddharthnagar—are grouped together as a distinct rice production environment commonly known as the ‘Middle Indo-Gangetic Plains’. It should also be noted that the surveyed area of Bangladesh’s floodplains primarily includes the Tista Meander Floodplain and Ganges River Floodplains and may not represent other floodplain areas in Bangladesh.