1.Arefe, R., Majid A. A., Barat, G., Behnam, Z. and Mohammad, S. 2017. A Case Study of Energy Balance and Economic Analysis of Castor Cultivation in Iran. Journal of Advanced Agricultural Technologies, 4(3): 290-295

2.Dalgaard, T., Halberg, N. and Porter, J.R. 2001. A model for fossil energy use in Danish agriculture used to compare organic and conventional farming. Agricultural Ecosystem and Environment, 87: 51-65.

3.Erdal, D., Handan, A., Bekir, D. and Yalcin, Y. 2009. Energy usage and benefit-cost analysis of cotton production in Turkey African. Journal of Agricultural Research, 4(7): 599-604.

4.Fluck, R.C. 1985. Energy sequestered in repairs and maintenance of agricultural machinery. Transactions of the American Society of Agricultural Engineers, 28: 738-44.

5.Gopalan, C.B., Ramasastri, V. and Balasubramanian, S.C. 1997. Nutritive value of Indian foods. National Institute of Nutrition Indian council of medical research, Hyderabad: 47-58

6.Hülsbergen, K.J., Feil, B. and Diepenbrock, W. 2002. Rates of nitrogen application required to achieve maximum energy efficiency for various crops: results of a long-term experiment. Field Crops Res., 77: 61-76.

7.Kumar, N.A.H. and Sridhara, S. 2018. Energy Requirement and Management in Castor Production. International Journal Pure Applied Bioscience, 6(2): 304-310.

8.Loewer, O.J., Benock, G., Gay, N., Smith, E.M., Burgess, S., Wells, L.G., Bridges, T.C., Springate, L., Boling, J.A., Brattord, G. and Debertin, D. 1977. Production of beef with minimum grain and fossil energy inputs. Vol.I, II, III. Report to NSF.

9.Mandal, K.G., Saha, K.P., Ghosh, P.K., Hati, K.M. and Bandyopadhyay, K.K. 2002. Bioenergy and economic analysis of soybean based crop production systems in Central India. Biomass and Bio Energy, 23: 33-45.

10.Manes, G.S. and Singh, S. 2005. Sustainability of cotton cultivation through optimal use of energy inputs in Punjab IE (I) Journal AG, 86: 61-64.

11.Mani, I., Kumar, P., Panwar, J.S. and Kant, K. 2007. Variation in energy consumption in production of wheat-maize with varying altitudes in Hilly Regions of Himachal Pradesh, India. Energy, 32: 2336-2339.

12.Meul, M., Nevens, F., Reheul, D. and Hofman, G. 2007. Energy use efficiency of specialized dairy, arable and pig farms in Flanders. Agricultural Ecosystem and Environment, 119: 135-44.

13.Ozkan, B., Akcaoz, H. and Karadeniz, C.F. 2004. Energy requirement and economic analysis of citrus production in Turkey. Energy Conversion Mgt., 45: 1812-30.

14.Shrestha, D.S. 1998. Energy input-output and their cost analysis in Nepalese agriculture.agriculture. http://www. public.iastate.edu/~dev/pdfdocs/Energy.PDF.

15.Singh, J.M. 2002. On farm energy use pattern in different cropping systems in Haryana India, Master of Science Thesis (Unpublished), International Institute of Management University of Flensburg, Germany.

16.Singh, R.S. and Chandra, H. 2001. Technological impact on energy consumption in rainfield soybean cultivation in Madhya Pradesh. Applied Energy, 70: 193-213.

17.Tsatsarelis C.A. 1993. Energy inputs and outputs for soft winter wheat production in Greece. Agric. Ecosyst. Environ., 43: 10-18.

18.Wells D. 2001. Total energy indicators of agricultural sustainability: dairy farming case study. Technical Paper 2001/3. Min. Agric. Forestry, Wellington, http://www. maf.govt.nz

19.Yaldiz, O., Ozturk, H.H., Zeren, Y. and Bascetincelik, A. 1993. Energy use in field crops of Turkey. 5th International Congress of Agricultural Machinery and Energy, Kusadası. Turkey.

20.Yilmaz, I., Akcaoz, H. and Ozkan, B. 2005. An analysis of energy use and input costs for cotton production in Turkey. Renewable Energy, 30: 145-55.