Algebra, F. I; MZ. Hussain; S. Aishia; and Daur I. (2015). Effect of Rht alleles on wheat grain yield and quality under high temperature and drought stress during booting and anthesis. Environ. Sci. Pollut. Res. 22:15506-15515.
Al-Taie, F. H.; C. Sycand and J. Stoops (1969). Soil groups of Iraq, their classification and characteristics-pedologie, 19:65-148.
Aziz, S. N. (2006). Survey and classification of some soils from Kurdistan region. M.Sc. thesis submitted to the university of Sulaimani, college of agriculture.
Dimova, D., Valcheva, D., S. Zapranov and G. Mihova, (2006). Ecological plasticity and stability in the yield of winter barley varieties, Jubilee conference 65 years agrarian science in Dobrudzha. Field Crop Studies, 3 (2): 197-203.
Evans, L. T. and I. F. Wardlaw, (1976). Aspects of the comparative physiology of grain yield in cereals, Academic Press, New York. Advance in Agronomy, 28: 301-359.
GraphPad Prism version 8.0.0 for Windows (2019), Linear regression analysis was performed using graphPad Software, San Diego, California USA, www.graphpad.com.
Helbaek, h. (1953). Archaeology and agricultural botany. Ann. Rept. Inst. Archaeol. pp. 45-59, illus. London.
Kassim, J. K.; K. Z. Al-Janabi and M. I. Karim (1989). Soil temperature regimes in Iraq: II-Relationships between soil temperature and latitude, longitude and elevation. J. Agri. Water Reso. Res. 8(1):111-121.
Kumari, M. (2013). Association of staygreen trait with canopy temperature depression and yield traits under terminal heat stress in wheat (Triticum aestivum L.). Euphytica 190.1: 87-97.
Linear regression analysis was performed using GraphPad Prism version 8.0.0 for Windows (2019), GraphPad Software, San Diego, California USA, www.graphpad.com
Mahmood, Y. A. (2010). Full Diallel Crosses in Two-rowed Barley (Hordeum vulgare L.). M.Sc. thesis submitted to the university of Sulaimani, college of agriculture.
Maisa’a, F., Adel H. Abdel-Ghani, and Nedal F. Al-Majali. (2013). Response of barely varieties to drought stress imposed at different developmental stages. Jordan Journal of Agricultural Sciences 9.4.
Penchev, P. and V. Koteva, (2002). Impact of agro-meteorological conditions on productivity of winter forage barley. Selection and Agro Technology Arable Crops, 2: 517-522.
Rasmussen, D. C. and R. Q. Chanel, (1970). Selection for grain yield and components of yield in barley. Crop Science, 10: 51-54.
Reid, D.A. & G.A. Wiebe, 1979. Toxonomy, botany, classification, and world collection, pp. 78–103. In: USDA, USA (Eds). Barley-Agricultural Handbook No. 338, Washington D.C.
Serrago, R. (2013). Understanding grain yield responses to source–sink ratios during grain filling in wheat and barley under contrasting environments. Field Crops Research 150: 42-51.
Shao, Hong-Bo, et al. "Water-deficit stress-induced anatomical changes in higher plants." Comptes rendus biologies 331.3 (2008): 215-225.
Sinebo, W., (2002). Determination of grain protein concentration in barley: Yield relationship of barleys grown in a tropical highland environment. Crop Science Journal, 24: 428-437.
VSN International (2017). Genstat for Windows 19th Edition. VSN International, Hemel Hempstead, UK.
Walter, H. and H. Leith (1960). Climadigram welt atlas. Jena, 4: 434.
Zadoks JC, Chang TT, Konzak CF. (1974). A decimal code for the growth stages of cereals. Weed research 14, 415-421.
Zhang J (2011). China's success in increasing per capita food production. J. Exp. Bot. 62: 3707-3711.