Population, Seeding, Variety, Yield.
 M. I. Hussein and S. H. Shah, "Growth, yield and quality response of three wheat (Triticum aestivum L.) varieties to different levels of N, P and K," International Journal of Agriculture and Biology, vol. 4, pp. 362-364, 2002.
 E. E. M., A. M. El Naim, M. K. Abdelrhaman, and A. A. Ishag, "Effect of sowing date and cultivar on seed yield of wheat (Triticum aestivum L.) in new Halfa Eastern Sudan," International Journal of Research Studies in Agricultural Sciences, vol. 4, pp. 34-39 2018.
 G. Wall, R. Garcia, B. Kimball, D. Hunsaker, P. Pinter, S. P. Long, C. Osborne, D. Hendrix, F. Wechsung, and G. Wechsung, "Interactive effects of elevated carbon dioxide and drought on wheat," Agronomy Journal, vol. 98, pp. 354-381, 2006. Available at: https://doi.org/10.2134/agronj2004.0089.
 R. Singh and R. Trethowan, Breeding spring bread wheat for irrigated and rain fed production systems of the developing world. In: Kang M, Priyadarshan PM Breeding major food staples. New York: Blackwell Publishing: John Wiley and Sons. Inc, 2007.
 T. D. Teare and M. M. Peet, Crop water relations, wheat and Sugarcane. Tilly L. and L. Chapman. 1999. Benchmarking crop water index for Queensland sugar industry. The United Nations: Tilly and Chapman, 1983.
 OECD-FAO, "OECD-FAO agricultural outlook 2018-2027, OECD Publishing, Paris/Food and AgricultureOrganization of the United Nations, Rome. Available: https://doi.org/10.1787/agr_outlook-2018-en," 2018.
 V. Sardana, S. Sharma, and A. Randhawa, "Performance of wheat (Triticum aestivum) varieties under different sowing dates and nitrogen levels in the submontane region of Punjab," Indian Journal of Agronomy, vol. 47, pp. 372-377, 2002.
 S. A. Suleiman, "The influence of triticum asetivum seeding rates and sowing patterns on the vegetative characteristics in Shambat soil under irrigation," Research Journal of Agriculture and Biological Sciences, vol. 6, pp. 93-102, 2010.
 G. Nizamani, A. Imtiaz, A. Khatri, M. Siddiqui, M. Nizamani, and M. Khaskheli, "Influence of different row spacing on agronomic traits in different wheat varieties," International Journal of Development Research, vol. 4, pp. 2207-2211, 2014.
 A. Ozturk, O. Caglar, and S. Bulut, "Growth and yield response of facultative wheat to winter sowing, freezing sowing and spring sowing at different seeding rates," Journal of Agronomy and Crop Science, vol. 192, pp. 10-16, 2006. Available at: https://doi.org/10.1111/j.1439-037x.2006.00187.x.
 N. Iqbal, N. Akbar, M. Ali, M. Sattar, and L. Ali, "Effect of seed rate and row spacing on yield and yield components of wheat (Triticum aestivum L.)," Journal of Agricultural Research, vol. 48, pp. 151-156, 2010.
 A. Muhammad, C. G. Rabbani, G. M. Subhani, and I. Khaliq, "Combinig ability studies for some polygenic traits in aestivium species," Pakistan Journal of Biological Sciences, vol. 2, pp. 434-437, 1999. Available at: https://doi.org/10.3923/pjbs.1999.434.437.
 B. Saeed, G. Hasina, A. Shazma, K. Ayub, A. Shamsher, and N. Ishrat, "Performance of wheat varieties sown under solid and skip row geometry," Journal of Agricultural and Biological Science, vol. 7, pp. 545-548, 2012.
 B. P. Pandey, K. B. Basnet, M. R. Bhatta, S. K. Sah, R. B. Thapa, and T. P. Kandel, "Effect of row spacing and direction of sowing on yield and yield attributing characters of wheat cultivated in Western Chitwan, Nepal," Agricultural Sciences, vol. 4, pp. 309-316, 2013. Available at: https://doi.org/10.4236/as.2013.47044.
 M. Shahzad, Wasi-ud-Din, S. Sahi, M. Khan, M. Ehsanullah, and M. Ahmad, "Effect of sowing dates and seed treatment on grain yield and quality of wheat," Pakistan Journal of Agricultural Sciences, vol. 44, pp. 581-583, 2007.
 M. Baloch, I. Shah, M. Nadim, M. Khan, and A. Khakwani, "Effect of seeding density and planting time on growth and yield attributes of wheat," The Journal of Animal and Plant Sciences, vol. 20, pp. 239-240, 2010.
 K. Hayatullah, A. Muhammad, H. Iqtidar, Z. Muhamad, and K. Masood, "Effects of sowing methods and seed rates on grain yield and yield components of wheat variety pak-8," Pakistan Journal of Biological Sciences, vol. 3, pp. 1177-1179, 2000. Available at: https://doi.org/10.3923/pjbs.2000.1177.1179.
 D. K. Tompkins, G. E. Hultgjreen, A. T. Wright, and D. B. Fowler, "Seed rate and row spacing of no- till winter wheat," Agronomy Journal, vol. 83, pp. 684-688, 1991. Available at: https://doi.org/10.2134/agronj1991.00021962008300040022x.
 K. Naseem, A. R. H. Qureshi, J. a. Akhtar, and M. A. Masood, "Screening of wheat (Triticum aestivum L.) genotypes against salinity in solution culture," Pakistan Journal of Agricultural Sciences, vol. 37, pp. 1-6, 2002.
 S. S. Thakur, I. S. Pandev, S. J. Singh, and Mishr, "Effect of seed rate and row spacing on late sown wheat in alluvial calcareous soil," Journal of Research Birsa Agriculture University, vol. 2, pp. 123-125, 1996.
 E. Hameed, S. A. Wajid, A. A. Shad, J. Bakht, and T. Muhammad, "Effect of different planting dates, seed rates and nitrogen levels on wheat," Asian Journal of Plant Sciences, vol. 2, pp. 464-474, 2003. Available at: https://doi.org/10.3923/ajps.2003.467.474.