1.Ahmad, N, Singh, K.M., Sinha, D.K. and Mishra, R.R. 2019. Food security and sustainability of agricultural production: An economic appraisal in Indian context. Int. J. Chem. Stud., 7(4): 3229-3232.

2.Ahmad, N., Sinha, D.K. and Singh, K.M. 2017. Estimating Production Efficiency in Rice Cultivation of Bihar: An Economic Approach. Econ. Affair, 62(3): 353-360.

3.Cuddy, J.D.A. and Della Valle, P.A. 1978. Measuring the instability of time series data. Oxford Bulletin Econ. Stat., 40: 79-85.

4.Dzanku, F.M, Jirstorm, M. and Marstorp, H. 2015. Yield gapbased poverty gaps in rural sub-Saharan Africa. World Dev., 67: 336-362.

5.FAO, 1998. On the measurement of instability of agricultural production and the associated risk of insecurity. In: A Paper presented in Sixth IWG. Agri. Seminar on Agri. Statistics, Russia, June 29–July 3, 1998.

6.Godfray, H.C.J., John, R.B. Ian, R.C. Lawrence, H. David, L. James, F.M., Jules, P. Sherman, R. Sandy, M. T. and Camilla T. 2010. Food security: The challenge of feeding 9 billion people. Sci., 327: 812-818.

7.Hazell, Peter B.R. 1982. Instability in Indian Food grain Production, Research Report No. 30, International Food Policy Research Institute, Washington, D.C., U.S.A.

8.Kaur, N. and Singhal, K.C. 1988. India’s Export Instability. Margin, 21: 54-61.

9.Kumar, A., Singh, R.K.P., Singh, K.M. and Mishra, J.S. 2018. Economics of paddy (Oryza sativa) production: A comparative study of Bihar and Punjab. Ind. J. Agril. Sci., 88(2): 314–9.

10.Larson, D.W., Jones, E., Pannu, R.S. and Sheokand, R.S. 2004. “Instability in Indian Agriculture – A Challenge to the Green Revolution Technology”, Food Policy, 29(3): 257-273.

11.Licker, R., Johnston, M., Foley, J.A., Barford, C., Kucharik, C.J., Monfreda, C. and Ramankutty, N. 2010. Mind the gap: How do climate and agricultural management explain the ‘yield gap’ of croplands around the world? Global Eco. and Biogeography, 19(6): 769-782.

12.Rani, N.S., Prasad, G.S.V. Sailaja, B., Muthuraman, P., Meera, S.N and. Viraktamath, B.C. 2010. Rice Almanac India. Pp. 307. Directorate of Rice Research, Hyderabad.

13.Rosegrant, M.W. Ringler, C. and Zhu, T. 2009. Water for Agriculture: Maintaining food security under growing scarcity. Annual Rev. Env. and Resou., 34(1).

14.Sharma, H.R., Singh, Kamlesh and Kumari, S. 2006. “Extent and Source of Instability in Food grains Production in India”, Ind. J. Agril. Econ., 61(4): 648-666.

15.Singh, K.M., Singh, R.K.P. and Kumar, A., Meena, M.S., Kumar, A. and Chahal, V. P. 2015c. Implications of labour migration for rice production and household economy: evidences from eastern India. Ind. J. Agril. Sci., 85(5).

16.Singh, R.K.P., Singh, K.M., and Kumar, A. 2015b. Agricultural Development in Bihar: Some Empirical Evidences. Agril. Situation India, 70(12): 5-13.

17.Singh, R.K.P., Singh, K.M. and Kumar, A. 2015a. A Study on Adoption of Modern Agricultural Technologies at Farmlevel in Bihar. Econ. Affai., 60(1): 49-57.

18.Sinha, D.K., Ahmad, N. and Singh, K.M. 2016. Shrinking Net Sown Area: An Analysis of Changing Land Use Pattern in Bihar. J. AgriSearch, 3(4): 238-243.

19.Sivagnanam, Jothi, K. 2014. Spread of New Varieties of Hybrid Rice and its Impact on the Overall Production and Productivity in Tamil Nadu. Agro-Economic Research Centre, University of Madras, Chennai-600 005.

20.UNFPA. 2010. State of world population 2010-from conflict and crisis to renewal: generations of change. United Nations Population Fund. Available on http://www. unfpa. org/swp/ 2010/web/en/pdf/ENSOWP10.pdf

21.Van Wart, J., Kersebaun, K.C., Peng, S., Milner, M. and Cassman, K.G. 2013. Estimating crop yield potential at regional to national scales. Field Crops Res., 143: 34-43.