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2Sustainability, productivity, profitability and nutritional diversity of six cropping systems under conservation agriculture: A long term study in eastern India Sustainability, productivity, profitability and nutritional diversity of six cropping systems under conservation agriculture: A long term study in eastern Indiaby Dutta, S.K., Laing, Alison, Kumar, Sanjay, Shambhavi, Shweta, Kumar, Sunil, Kumar, Birender, Verma, D.K., Kumar, Arun, Singh, Ravi Gopal, Gathala, Mahesh K.bibliotecaCIMMYT