Akhavan, M. 2002. Evaluate the effectiveness of quality management systems based on ISO 9000 standard series, with a focus on business processes and operations in Iran. A Thesis Submitted for the Degree of M.Sc. Technological Faculty of Tehran University, Tehran, Iran. (In Persian with English Summary)
Bazrgar, A.B. 2011. Environmental Assessment of Khorasan Sugar beet Production Systems Using LCA Ph.D. PhD Dissertation, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran. (In Persian with English Summary)
Bureau of Statistics and Information Technology. 2015. Department of Plant production improvement, Agriculture Organization of Golestan province. The Ministry of Agriculture verified 5 March 2016. (In Persian)
Gazor, M.R., and Loghavi, M. 2007. Influence of shallow tines on draft requirement of subsoiler and soil physical conditions. Pajouhesh and Sazandegi 73: 111-105. (In Persian with English Summary)
Hajjarpoor, A. 2016. Yield gap evaluation of wheat in Golestan Province. PhD Dissertation, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran. (In Persian with English Summary)
Hajjarpoor, A., Soltani, A., and Torabi, B. 2015. Using boundary line analysis in yield gap studies: Case study of wheat in Gorgan. Electronic Journal of Crop Production 8: 183-201. (In Persian with English Summary)
Kalateh Arabi, M., Qujeq, H., Nuriniya, A., Suqhi, H., Sheikh, F., Dehghan, M.A., Kia, S., Jafarbye, J.A., Fallahi, H.A., Sadeqhnezhad, H.R., Kiyani, A., Kazemi Talachi, M., Islami, K., Aqhajani, M.A., Mobasheri, M.T., Baqherani, N., Savarinejad, A., and Mohammadi, R. 2013. Technical instructions wheat in Golestan province. Ministry of Agriculture, Food and Natural Resources Research Center of Golestan province, Golestan, Iran. (In Persian)
Khajehpour, M.R. 2013. Cereals. Isfahan University Press, Isfahan, Iran. 782 pp. (In Persian)
Latifi, N., Faraji, A., and Seyedi, F. 2012. Principles of Agronomy. Written by Yellamanda Reddy, T. and Sankara Reddi, J. H. Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran. 688 p. (In Persian)
Moshiri, F., Tehrani, M.M., Shahabi, A.A., Keshavarz, P., Khougar, Z., Feyzi Asl, V., Asadi Rahmani, H., Samavat, S., Sadri, M.H., Rashidi, N., Saadat, S., and Khademi, Z. 2015. Guidelines integrated management of soil fertility and wheat nutrition. Soil and Water Research Institute 100 p. (In Persian)
Rezvantalab, N. 2015. Investigation of factors affecting the fuel consumption of soybean production in the Golestan province. PhD Dissertation, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran. (In Persian with English Summary)
Solhjoo, A.A., and Niyazi Ardakani, J. 2001. Effect of subsoiler operations on soil physical specifications and yield of irrigated wheat. Journal of Agricultural Engineering Research 2: 78-65. (In Persian with English Summary)
Soltani, A., Rajabi, M.H., Zeinali, E., and Soltani, E. 2013. Energy inputs and greenhouse gases emissions in wheat production in Gorgan, Iran. Energy 50: 54-61.
Torabi, B., Soltan, A., Galeshi, S., and Soltani, E. 2012. Documenting the process of wheat production in Gorgan. Journal of Plant Production 19(4): 19-42. (In Persian with English Summary)
Turner, A.R., and Detoro, I.J. 2000. Process Redesign, PH. PTR, USA.
Van Ittersum, M.K., Cassman, K.G., Grassini, P., Wolf, J., Tittonell, P., and Hochman, Z. 2013. Yield gap analysis with local to global relevance-A review. Field Crops Research 143: 4-17.
Zarei, B., and Zarei, A. 2004. Extensive documentation processes in the government sector: Provide a Strategy. Journal of Civil Engineering, Bimonthly of Shahed University 8: 15-30. (In Persian with English Summary)
Zeinali, E. 2009. Wheat Nitrogen in Gorgan; Agronomical, Physiological and Environmental Aspects. PhD Dissertation, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran. (In Persian with English Summary)