1.Abedi-Koupai, J., Sohrab, J. and Swarbrick, G. 2008. Evaluation of hydrogel application on soil water retention characteristics. J. Plant. Nutr. 31: 317-331.
2.Alah Gholipour, M. and Mohammad Salehi, M.S. 2003. Factor and path analysis in different rice genotypes. J. Seed Plant Prod. 19: 76-87. (In Persian)
3.Alizadeh, A. and Kamali, Gh. 2008. Water requirement of plants in Iran. Emam Reza University Press. 228p. (In Persian)
4.Bagheri, R., Akbari, Gh.R., Kianmehr, M.H. and Tahmasebi Sarvestani, Z. 2011. The effect of slow releasing nitrogen from pellet fertilizer of nitrogen and manure on grain yield and some physiological characteristics of corn. Elec. J. Crop Prod. 4: 1. 97-113. (In Persian)
5.Bahrani, M.J. and Babaei, G.H. 2007. Effect of different levels of plant density and nitrogen fertilizer on grain yield and its components and some quality traits in two sesame (Sesamum indicum L.) cultivars. Iranian. J. Crops. Sci. 9: 3. 237-245. (In Persian)
6.Bayat, S., Sepehri Zare, A., Abyaneh, H. and Abdollahi, M.R. 2010. Effect of salicylic acid and paclobutrazol on some growth characteristics and yield of maize in conditions of drought stress. J. Crops. Ecoph. 2: 34-41. (In Persian)
7.Bremner, J.M. and Mulvaney, C.S. 1965. Nitrogen-Total. In: Methods of soil analysis: part 2, Chemical and Microbiological Properties. Page, A.L. (Ed). 1982. Second Edition. American Society of Agronomy Inc. Madison, Wisconsin USA. Agron. Series, 9: 595-622.
8.El-Tayeb, M.A. 2005. Response of barley to the interactive effect of salinity and salicylic acid. Plant. Grogwh. Reg.
45: 215-225.
9.Eneji, A.E., Islam, R., An, P. and Amalu, U.C. 2013. Nitrate retention and physiological adjustment of maize to soil amendment with superabsorbent polymers. J. Clea. Prod. 52: 474-480.
10.Farahani, M.A., Paknejad, F., Bakhtiari Moghaddam, M., Alavi, S. and Hasibi, A. 2012. Effect and different methods of salicylic acid application on yield and yield components of Cuminum cyminum L. J. Agron. Plant. Breed. 8: 69-77.
(In Persian)
11.Horvath, E., Janda, T., Szalai, G. and Paldi, E. 2002. In vitro salicylic acid inhibition of catalase activity in maize: differences between the isozymes and a possible role in the induction of chilling tolerance. Plant. Sci. 163: 1129-1135.
12.Jahan, M., Amiri, B. and Noorbakhsh, F. 2017. Evaluation of the increased rates of water super absorbent and humic acid application under deficit irrigation condition on some agroecological characteristics of Zea mays using response surface methodology. Iranian. J. Field. Crops. Res. 14: 4. 766-784. (In Persian)
13.Jahan, M., Ghalenoee, Sh., Khamooshi, A. and Amiri, MB. 2015. Evaluation of some agroecological characteristics of basil (Ocimum basilicum L.) as affected by simultaneous application of water saving superabsorbent hydrogel in soil and foliar application of humic acid under different irrigation intervals in a low input cropping system. J. Hort. Sci. 29: 2. 240-254. (In Persian)
14.Jahan, M., Kamayestani, N. and Ranjbar, F. 2013. Assay for applying super absorbent polymer in a low input corn (Zea mays L.) production system aimed to reduce drought stress under Mashhad conditions. Agroecol. 5: 3. 272-281. (In Persian)
15.Keykha, H., Ganjali, H.R. and Naroui Rad, M.R. 2014. Effect of water stress and applications of superabsorbent on grain yield, harvest index, biological yield and plant height in sunflower. Int. J. Biosci. 5: 3. 44-49.
16.Khazaee, H.R. and Banayan, M. 2011. Application of use time and amount of humic acid on biomass and oil content of Hyssopus officinalis. Iranian. J. Med. Aro. Plants. 5: 25-35. (In Persian)
17.Koocheki, A. and Sarmadnia, Gh. 2006. Crop Physiology. Mashhad Daneshgahi Jihad Press. Pp: 254-255. (In Persian)
18.Maji, D., Misra, P., Singh, S. and Kalra, A. 2017. Humic acid rich vermicompost promotes plant growth by improving microbial community structure of soil as well as root nodulation and mycorrhizal colonization in the roots of Pisum sativum. Appl. Soil. Ecol. 110: 97-108.
19.Mehrabian Moghaddam, N., Arvin, M.J., Khajueenejad, Gh. and Maghsudi, K. 2011. Effect of salicylic acid on growth and seed and forage yield of maize in conditions of drought stress in farm. J. Seed. Plant. Prod. 27: 41-55.
(In Persian)
20.Mohammadzadeh, A., Majnoon Hosseini, N., Moghaddam, H. and Akbari, M. 2012. Effect of drought stress and nitrogen fertilizer levels on physiological characteristics of two red kidney bean genotypes. Iranian. J. Crop. Sci. 14: 3. 294-308. (In Persian)
21.Montesano, F.F., Parente, A., Santamaria, P., Sannino, A. and Serio, F. 2015. Biodegradable superabsorbent hydrogel increases water retention properties of growing media and plant growth. Agri. Sci. 4: 451-458.
22.Morphy, J. and Riley, J.P. 1962. Phosphorus analysis procedure. In: Methods of soil analysis: part 2, Chemical and Microbiological Properties. Page, A.L. (Ed). 1982. Second Edition. Madison, Wisconsin USA. Pp: 413-427.
23.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 on sunflower. Not. Sci. Biol. 2: 53-58.
24.Nykanen, V.P.S., Nykanen, A.,
Puska, M.A., Goulart-Silva, G. and Ruokolainen, J. 2011. Dual-reponsive and super absorbing thermally cross-linked hydrogel based on methacrylate substituted polyphosphazene. Soft. Matter. 7: 4414-4424.
25.Payeroa, J.O., Tarkalson, D.D., Irmakc, S., Davisond, D. and Petersend, J.L. 2009. Effect of timing of a deficit-irrigation allocation on corn evapotranspiration, yield, water use efficiency and dry mass.
Agric. Water. Manage. 96: 10. 1387-1397.
26.Reddy, K.S., Maruthi, V. and Umesha, B. 2015. Influence of super absorbent polymers on infiltration characteristics of alfisols in semi-arid region. Indian. J. Dryland. Agric. Res. Develop. 30: 2. 11-16.
27.Rezashateri, M., Khajeddin, S.J., Abedi-Koupai, J., Majidi, M.M. and Matinkhah, H. 2017. Growth characteristics of Artemisia sieberi influenced by super absorbent polymers in textureally different soils under water stress condition. Archives. Agron. Soil. Sci. 63: 7. 984-997.
28.Ruqin, F., Jia, L., Shaohua, Y., Yunlai, Z. and Zhenhua, Z. 2015. Effects of biochar and super absorbent polymer on substrate properties and water spinach growth. Pedosphere. 25: 5. 737-748.
29.Rezazadeh, H., Khrasani, S.K. and Haghighi, R.S.A. 2012. Effects of humic acid on decrease of phosphorus usage in forage maize var. KSC704 (Zea mays L.). Australian. J. Agri. Eng. 3: 34-38.
30.Shaaban, S.H.A. 2009. Humic acid foliar application to minimize soil applied fertilization of surface irrigationed wheat. J. Agri. Sci. 5: 207-210.
32.Shuqaev, A.G., Butsanets, P.A., Andreev, I.M. and Shugaeva, N.A. 2014. Effect of salicylic acid on the metabolic activity of plant mitochondria. Russian. J. Plant. Physiol. 61: 4. 555-564.
33.Sidari, M., Attina, E., Francioso, O., Tugnoli, V. and Nardi, S. 2006. Biological activity of humic substances is related to their chemical structure. Soil. Sci. Soc.. Amer. J. 71: 75-85.
34.Tadayyon, A., Beheshti, S. and Pessarakli, M. 2017. Effects of sprayed humic acid, iron and zinc on quantitative and qualitative characteristics of Niger plant (Guizotia abyssinica L.). J. Plant. Nutr. 40: 1644-1650.
35.Tousi Mojarrad, M., Ghannadha, M.R., Khodarahmi, M. and Shahabi, S. 2005. Factor analysis for seed yield and
some wheat characteristics. J. Pajhohesh Sazandegi. 66: 9-16. (In Persian)
36.Turkmen, O., Demir, S., Sensoy, S. and Dursun, A. 2005. Effect of arbuscular mycorrhizal fungus and humi acid on the seedling development and nutrient content of pepper grown under saline soil conditions. J. Biol. Sci. 5: 565-574.
37.Wani, A.B., Chadar, H., Wani, A.H., Singh, S. and Upadhyay, N. 2017. Salicylic acid to decrease plant stress. Environ. Chem. Lett. 15: 101-123.
38.Xie, L., Liu, M., Ni, B., Zhang, X. and Wang, Y. 2011. Slow-release nitrogen and boron fertilizer from a functional superabsorbent formulation based on wheat straw and attapulgite. J. Chem. Engineering. 167: 342-348.
39.Zeinali, H., Nasrabadi, A., Hoseinzadeh, H., Chougan, R. and Sabokdast, M. 2005. Factor analysis of hybrid varieties of maize. J. Iran. Agri. Sci. 36: 895-902. (In Persian)
40.Zhong, K., Zheng, X.L., Mao, X.Y., Lin, Z.T. and Jiang, G.B. 2012. Sugarcane bagasse derivative-based superabsorbent containing phosphate rock with water-fertilizer integration. Carbohydrate Polymers. 90: 820-826.
41.Ziaei, A., Moghaddam, M. and Kashefi, B. 2016. The effect of superabsorbent polymers on morphological traits of rosemary (Rosmarinus officinalis) under drought stress. J. Sci. Technol. Greenhouse. Culture. Soiless. Culture. Res. Center. 7: 2. 99-111. (In Persian)