Antolin, M.C., Yoller, J. and Sanchez-Diaz, M. 1995. Effects of temporary drought on nitrate fed and nitrogen –fixing alfalfa plants. Journal of Plant Sciences, 107: 159-165.
Ashtarilorki, S. 2007. Determining forage sorghum plant yield under drought and water use efficiency. The first zonal congress of crop agrophysiology. 13 Dec, 2007, Islamic Azad University, Ahvaz Branch, Ahvaz, Iran. PP: 1180-1187. (In Persian).
Bandak, E. 2011. Comparing effect of two kinds of superabsorbent A200 and stockosorb on germination, vegetative and establishment traits in Atriplex cansensis. M.Sc. thesis. Department of reclamation of dry and mountainous regions, College of Natural Resources, University of Tehran, 119 p. (In Persian).
Bowman, D.C. and Evans, R.Y. 1991. Calcium inhibition of polyacrylamide gel hydration is partially reversible by potassium. Journal of Horticultural Sciences, 26: 1063-1065.
Cosculleola, F. and Fact, J.M. 1992. Determination of the maize (Zea mays L.) yield functions in respect to water using a line source sprinkler. Journal of Field Crops Abstract, 93: 5611.
El-hadi, O.A. and Abo-sedera, S.A. 2006. Conditioning effect of composts and acrylamide hydrogels on a sandy calcareous soil. Physico-bio-chemical properties of the soil. International Journal of Agriculture and Biology, 8(6): 876-884.
Ghasemi, M. and Khoshkhoei, M. 2007. Effect of superabsorbent polymer on irrigation interval and growth and development of chrysanthemum. Iranian Journal of Horticultural Science and Technology, 8(2): 65-82. (In Persian).
Haji Hassani Asl, N., Moradi Aghdam, A., Aliabadi Farahani, H., Hosseini, N. and Rassaei Far, M. 2011. Three forage yield and its components under water deficit condition on delay cropping in Khoy zone (Iran). Journal of Advance in Environmental Biology, 5(5): 847-852.
Hassanpoor, J. Kafi, M.M. and Mirhadi, J. 2009. Effect of drought on yield and some physiological traits in barley. Iranian Journal of Agricultural Sciences, 39(1): 165-177. (In Persian).
Heidari, H., Jahansooz, M.R., Yunusa, I., Hosseini, S.M.B., Chaichi, M.R. and Jafari A.A. 2011. Effect of alternate irrigation on root-divided foxtail millet (Setaria italica). Australian Journal of Crop Science, 5: 205-213.
Hojatti, M., Zarei, M., Simkeshzadeh, N. and Baninasab, B. 2007. Effect of application of different rates of natural zeolite on Fenugreek plant growth. Abstract of articles of fifth Iranian horticultural science congress. 6 Sep, 2007, Shiraz University, Shiraz, Iran. 396 p. (In Persian).
Karimi, A. and Naderi, M. 2007. Yield and water use efficiency of forage corn as influenced by superabsorbent polymer application in soils with different textures. Iranian Journal of Research in Agriculture, 3: 187-198. (In Persian).
Malekian, A., Valizadeh, E., Dastoori, M., Samadi, S. and Bayat, V. 2012. Soil water retention and maize (Zea mays L.) growth as effected by different amounts of Pumice. Journal of Crop Sciences, 6(3): 450-454.
Nayyar, H. and Gupta, D .2006. Differential sensitivity of C3 and C4 plants to water deficit stress: association with oxidative stress and antioxidants. Journal of Environmental and Experimental Botany, 58: 106-113.
Nazarli, H., Zardashti, M.R., Darvishzadeh, R. and Najafi, S. 2010. The effect of water stress and polymer on water use efficiency, yield and several morphological traits of sunflower under greenhouse condition. Notulae Scientia Biologicae, 2(4): 53-58.
Ommen, O.E., Donnelly, A., Vanhoutvin, S., Vanoijen, M. and Manderscheid R. 1999. Chlorophyll content of spring wheat flag leaves grown under elevated CO2 concentration and other environmental stress within ESPACE-Wheat` project. European Journal of Agronomy, 10: 197-203.
Paknejad, F., Majidi heravan, E., Noor mohammadi, Q., Siyadat, A. and Vazan, S. 2007. Effects of drought stress on chlorophyll fluorescence parameters, chlorophyll content and grain yield of wheat cultivars. American Journal of Biochemistry and Biotechnology, 5: 162-169.
Rahman, M. U., Gul, S. and Ahmad, I. 2004. Effects of water stress on growth and photosynthetic pigments of corn (Zea mays L.) cultivars. International Journal of Agriculture and Biology, 6(4): 652– 655.
Rasheed, M., Hussain, A. and Mahnood, T. 2003. Growth analysis of hybrid maize as influenced by planting techniques and nutrient management. International Journal of Agriculture and Biology, (5)2: 169-171.
Sadeghi, H., Mosavi, S.Gh.R.J., Seghatoleslam, M. and Alizadeh, J. 2007. Investigating effect of deficit irrigation on yield and yield components of nitrified millet. 6th national congress of Agricultural and Natural Resources Science. 28-29 Nov, 2007, Juvenile Researchers Club, Azad University, Karaj Branch, Karaj, Iran, p 199. (In Persian).
Salar, N., Farahpoor, M. and Bahadori, F. 2005. Investigating hydrophyll polymer on irrigation interval on summer crop (melon). Third specialty-educational term of agricultural and industrial application of superabsorbent hydogel. 7 Nov, 2005, Tehran, p. 20. (In Persian).
Schlemmer, M.R, Francis, D.D., Shanahan, J.F. and Schepers, J.S. 2005. Remotely measuring chlorophyll content in corn leaves with differing nitrogen levels and relative water content. Agronomy Journal, 97:106–112.
Seyed Sharifi, R. 2008. Evaluation the effects of Polyethylene glycol on germination and growth seedling Carthamus cultivars. Iranian Journal of Biology, 21: 400-410. (In Persian).
Sheikhmoradi, F., Esmaeili, A. and Abdosi, V. 2011. Investigating irrigation interval and superabsorbent polymer on sport turf quality traits. Journal of Horticultural science, 25(2): 170-177. (In Persian).
Singh, B.R. and Singh, D.P. 1995. Agronomic and physiological responses of sorghum, maize and pearl millet to irrigation. Journal of Field Crops Research, 42: 57- 67.
Tohidi-Moghaddam, H.R., Shirani-Rad, A.H., Nour-Mohammadi, Gh., Habibi Modarres, D., Sanavy, S.A.M., Mashhadi- Akbar-Boojar, M. and Dolatabadian, A. 2009. Response of six oilseed rape genotypes to water stress and hyhydrogel application. Pesquisa Agropecuaria Topical Journal, 39: 243-250.
Xu, W., Rosenowd, T. and Nguyenh, T. 2007. Stay green trait in grain sorghum: relationship between visual rating and leaf chlorophyll concentration. Journal of Plant Breeding, 119: 365–367.
Yadava, U. 1986. A rapid and nondestructive method to determine chlorophyll in intactleaves. Journal of Horticulture Sciences, 21: 1449-1450.
Yang, G., Chen, X. and Sanico, J. 2011. Comparative genomics of two eco-logically differential populations of Hibiscus tiliaceus under salt stress. Functional Plant Biology, 38: 199-208.
Yazdani, F., Allahdadi, I. and Akbari, G.A. 2007. Impact of superabsorbent polymer on yield and growth analysis of soybean (Glycine max L.) under drought stress condition. Pakistan Journal of Biological Science, 10(23): 4190-4196.