Beg, A. S. S. P., Pourdad, S. S. & Alipour, S. (2007). Row and plant spacing effects on agronomic performance of sunflower in warm and semi-cold area of Iran. Helia, 30(47), 99-104.
Babamiri, O. & Dinpazhoh, Y. (2016). Comparison and Evaluation of Twenty Methods for Estimating Reference Evapotranspiration Based on Three General Categories: Air Temperature, Solar Radiation and Mass Transfer in the Basin of Lake Urmia. Journal of Water and Soil Science. 20(77), 145-161.
Bindra, A. & Kharwara, P. C. (1992). Response of spring sunflower (Helianthus annuus L.) to nitrogen application and spacing. Indian Journal of Agronomy, 37(2), 283-284.
Dipenbrock, W., Long, M. & Feil, B. (2001). Yield and quality of sunflower as affected by row orientation, row spacing and plant density. Bodenkultur-Wien & Munchen, 52(1), 29-36.
Fazel, M. A. & Lack, S. H. (2011). The effects of irrigation–off at different growth stages, planting patterns and plant population on grain yield and dry matter remobilization of grain corn. World Applied Sciences Journal, 15(4), 463-473.
Flenet, F., Kiniry, J. R., Board, J. E., Westgate, M. E. & Reicosky, D. C. (1996). Row spacing effects on light extinction coefficients of corn, sorghum, soybean, and sunflower. Agronomy Journal, 88(2), 185-190.
Ghaffari, M. & Hoseinlou, S. H. (2013). Seed yield determinants of sunflower under drought stressed and well watered conditions. International Journal of Agronomy and Plant Production, 4(Special Issue), 3816-3823.
Ghaffari, M. & Mirzapour M. (2009). Agronomic characteristics and heritability of traits in confection sunflower populations in Khoy. Journal of Research in Crop Sciences, 1(3), 95-106.
Goksoy, A. T., Turan, Z. M. & Açikgöz, E. (1998). Effect of planting date and plant population on seed and oil yield and plant characteristics in sunflower. Helia, 21, 107-116.
Gubbels, G. H. & Dedio, W. (1989). Effect of plant density and seeding date on early-and late-maturing sunflower hybrids. Canadian Journal of Plant Science, 69(4), 1251-1254.
Holt, N. W. & Campbell, S. J. (1984). Effect of plant density on the agronomic performance of sunflower on dryland. Canadian Journal of Plant Science, 64(3), 599-605.
Holt, N. W. & Zentner, R. P. (1985). Effect of plant density and row spacing on agronomic performance and economic returns of nonoilseed sunflower in southeastern Saskatchewan. Canadian Journal of Plant Science, 65(3), 501-509.
Killi, F. & Ozdemir, G. (2001). Response of hybrid oilseed sunflower cultivars to plant density. Proceedings of the 3th Field Crops Congress. Tekirdag, Turkey Vol. 2, 29-32.
Kholghi, M., Bernousi, I., Darvishzadeh, R. & Pirzad, A. (2011). Correlation and path-coefficient analysis of seed yield and yield related trait in Iranian confectionery sunflower populations. African Journal of Biotechnology, 10(61), 13058-13063.
Majid, H. R. & Schneiter, A. A. (1988). Semidwarf and conventional height sunflower performance at five plant populations. Agronomy journal, 80(5), 821-824.
Malakouti, M. J., Majidi, A., Balali, M. R., Drodi, S. & Davoudi, H., Shahbazi K., (2003). Optimum fertilizer recommendation to crops and fruits in West Azarbaijan. Technical publication No.196. Soil and Water Research Institute, Tehran, Iran, p 39.
Metz, G. L., Green, D. E. & Shibles, R. M. (1984). Relationships between Soybean Yield in Narrow Rows and Leaflet, Canopy, and Developmental Characters. Crop science, 24(3), 457-462.
Mojiri, A. & Arzani, A. (2003). Effect of nitrogen rate and plant density on yield and yield components of sunflower. Journal of Water and Soil Science, 7(2), 115-125.
Olowe, V. I. O. (2005). Effect of plant population density on growth and yield of sunflower (Helianthus annuus L.) in the transition zone of south west Nigeria. Tropical Agricultural Research and Extension, 8, 37-44.
Poursakhi, N. & Khajehpour, M. R. (2012). Effect of Planting Pattern and Plant Density on Yield and Yield Components of Sunflower, Hisun-36 Hybrid. Journal of Crop Production and Processing, 2(5), 1-12. (In Persian)
Robinson, R. G., Ford, J. H., Luenschen, W. E., Rabas, D. L., Smith, L. J., Warnes, D. D. & Wiersma, J. V. (1980). Response of Sunflower to Plant Population, Agronomy Journal, 72(6), 869-871.
Suzer, S. (2010). Effects of nitrogen and plant density on dwarf sunflower hybrids. Helia, 33(53), 207-214.
Schneiter, A. A. & Miller, J. F. (1981). Description of sunflower growth stages. Crop Science, 21(6), 901-903.
Shankar, V. G., Ganesh, M., Ranganatha, A. R. G. & Bhave, M. H. V. (2006). A study on correlation and path analysis of seed yield and yield components in sunflower (Helianthus annuus L.). Agricultural Science Digest, 26(2), 87-90.
Vannozzi, G. P. & Baldini M. (1988). The effect of plant density and “rectangularity” on achene yield in long and short stemmed sunflower cultivars. XII International Sunflower Conference, Yugoslavia. 1: 392-394.
Wade, L. J. & Foreman, J. W. (1988). Density multiply maturity interactions for grain yield in sunflower. Australian Journal of Experimental Agriculture, 28(5), 623-627.
Xiao, S., Chen, S. Y., Zhao, L. Q. & Wang, G. (2006). Density effects on plant height growth and inequality in sunflower populations. Journal of Integrative Plant Biology, 48(5), 513-519.
Yeremenko, O., Kalenska, S., Kiurchev, S., Rud, A., Chynchyk, O. & Semenov, O. (2017). Sunflower productivity under the effect of plant growth regulator in the conditions of insufficient moisture. Scientific achievements in agricultural engineering, agronomy and veterinary medicine, Traicon. 1(2), 196-217.
Zaffaroni, E. & Schneiter, A. A. (1991). Sunflower production as influenced by plant type, plant population, and row arrangement. Agronomy Journal, 83(1), 113-118.