Ahmad, M., Zaffar, G., Mir, S.D., Razvi, S.M., Rather, M.A., Mir, M.R. 2011. Saffron (Crocus sativus L.) strategies for enhancing productivity. Res. J. Med. Plant. 5(6): 630-649. [in Persian with English Summary].
Akter, F., Islam, N., Shamsuddoha, A.T.M., Bhuiyan, M.S.I., Shilpi, S., 2013. Effect of phosphorus and sulphur on growth and yield of soybean (Glycine max L.). Int. J. Bio-Resour. Stress Manage. 4(4), 555-560.
Aalizadeh, M., makarian, H., ebadi, A., shafaroodi, A. (2021). Evaluation of the effect of different fertilizer treatments on yield and some reproductive traits of Saffron (Crocus sativus L.) in the climatic conditions of Ardabil. Journal of Saffron Research, 9(1), 11-27. [in Persian with English Summary].
Amani, F., Reisi, F., 2008. The role and importance of sulfur in soybean cultivars growth and phosphorus uptake from a calcareous soil. Abstract of the articles of the 9th Iranian Congress of Agriculture and Plant Breeding. University of Tehran, Abu Reihan Campus.
Avarseji. Z., Kafi, M., Sabet Teimouri, M., Orooji, K., 2013. Investigation of salinity stress and potassium levels on morphophysiological characteristics of saffron. J. Plant Nutr. 36: 299–310.
Azizi Zahan, A.A., Kamgar Haghighi, A.A., Sepaskhah, A. R., 2006. The effect of irrigation method and cycle on bud production and flowering in saffron (Crocus sativus L.) J. Sci. Technol. Agric. Nat. Resour. 1: 45-53. [in Persian with English Summary].
Beiki, A.H., Keifi, F., Mozafari, J., 2010. Genetic differentiation of Crocus species by random amplified polymorphic DNA. Genet. Eng. Biotechnol. J., 18: 1-10.
Besharati Kalayeh, H., Saleh Rastin, N., 2000. The effect of sulfur consumption and inoculation of Thiobacillus bacteria on the amount of iron and zinc absorbed by corn under greenhouse conditions, Journal of Soil and Water. 7 (12): 63-72. [in Persian with English Summary].
Choopan, Y., hezarJaribi, A., Ghorbani, K., Hesam, M., Khashei-Siuki, A. (2021). Evaluation of the effect of municipal wastewater and irrigation time on quantitative and qualitative reactions of saffron (Crocus sativus L.). Journal of Saffron Research, 9(1), 45-59. [in Persian with English Summary].
Dilmaghani, M.R., Malakouti, M.J., Neilsen, G.H., Fallahi, E., 2004. Interaction effect of K and Ca on K/Ca ratioand its consequence to apple fruit quality on calcareous soils of Iran. J. Plant Nutr. 27: 1149-1162.
Fismes, J., Vong, P.C., Guckert, A., Frossard, E., 2000. Influence of sulfure on apparent N-use efficiency, yield and quality of oilseed rape (Brassica napus L.) grown on a calcareous soil. Eur. J. Agron. 12(2): 127-141.
Ghavi, M., Sadrabadi Haghighi, R., 2015. Effect of the foliar application of biological, biostimulator and chemical fertilizers on growth characterestics and yield of saffron (Crocus sativus L.). J. Crop. Prod. 8(3): 139-158. [in Persian With English Summary].
Heidari, M., Asgharipour, M.R., 2012. Effect of different amounts of potassium sulfate on yield and yield components of grain sorghum under drought stress. Iranian Journal of Crop Research. 10: 371-384. [in Persian with English Summary].
Ivan, J., 2007. Micronutrient innovation. Potato Grower Magazine. Harris Publishing Inc. USA, 1: 58-61
Jahan, M., Jahani, M., 2007. The effects of chemical and organic fertilizers on saffron flowering. Acta Horticulturae, 739: 81-86.
Kafi, M., Rashedmohasel, M. H., Kuchaki, A., Molafilabi, A., 2002. Saffron production and processing technology. University of Mashhad, Iran. [in Persian].
Kariminejad, M., Pazouki A., Taraghi, A.F., 2016. Investigation of the effects of planting arrangement and density on yield and some agronomic traits of saffron (Crocus sativus L) in Shahre Rey. J. Res Crop Sci. No. 18, pp. 51-60. [in Persian with English Summary].
Kariminia, A., 1997. Identification of Thiobacillus species isolated from some soils of Iran and their effect on reducing the pH of different soils. Tarbiat Modares University Master Thesis. Tehran Iran. [in Persian with English Summary]
Koocheki, A., Jahani, M., Tabrizi, L., Mohammadabadi, A. A., 2011. Investigation on the effect of biofertilizer, chemical fertilizer and plant density on yield and corm criteria of saffron (Crocus sativus L.). Water and Soil, 25(1). [in Persian with English Summary].
Malakoti, M.J., Shhabi, A.A., Bazargan, K., 2005. Potash in Iran Agriculture. Sana Publications. Tehran. Iran. [in Persian].
Malakouti, M.J., Malakouti, A., Bybordi, I., Khamesi, E., 2010. Zinc (Zn) is the neglected element in the life cycle of plant, animal and human health (10th edition with complete revision). Tech. bulletin No. 007. Soil Science Department-Tarbiat Modares University. Sana Pub. Co., Tehran, Iran. 14 pp.
Ministiry of Agriculture-Jahad., 2020. Agricultural statistics of the cropping year 2019-2020, the second volume of horticultural products. Ministry of Jihad Agriculture, Deputy of Planning and Economy, Information and Communication Technology Center.
Molaei Niqabadi, M., Lebaschi, M.H., Ansari, Kh., 2014. Investigation of the effect of chemical fertilizer application time and coriander density on saffron yield in rainfed conditions of Damavand region. J. Crop. Prod. Res. 6 (1): 87-95. [in Persian with English Summary].
Molina, R.V., Valero, M., Navarro, Y., Guardiola, L. E., Garcia-Luice, A., 2005. Temperature effects on flower formation in saffron (Crocus sativus L.). Sci. Hortic. 103: 361-379.
Mostafavi Rad, M., Tahmasebi Sarvestani, Z.A., Modares Sanavi., S.A.M., Qalavand, A., 2011. Evaluation of yield, fatty acid composition and amount of seed micronutrients in high yielding rapeseed cultivars under different amounts of sulfur. Elec J. Crop. Prod. 4: 1 60-43. [in Persian with English Summary].
Nakhzari Moghaddam, A., Ghaffari, S., Rahmi Karizki, A., Salahi Farahi, M., 2016. Effect of different levels of sulfur and thiobacillus fertilizer on yield, yield components and percentage of sunflower seed oil in Gonbad region. J. Prod. Oil. Plants. 2 (2): 25-34. [in Persian with English Summary].
Omidi H., Naqdi Badi H.A., Golzad A., Torabi H., Fotokian M.H., 2010. The effect of chemical fertilizer and bio nitrogen on quantitative and qualitative yield of saffron. J. Med. Plants. 8 (2): 99-109. [in Persian with English Summary].
Omidi, H., Naghdibadi, H.A., Golzad, A., Torabi H., Fotoukian, M.H., 2009. The effect of chemical and bio-fertilizer source of nitrogen on qualitative and quantitative yield of saffron (Crocus sativus L.). J. Med. Plants. 8: 98-09. [in Persian with English Summary].
Ormanm S., Kaplanm M., 2007. Effects of Elemental Sulphur and Organic Manure on Sulphur, Zinc, and Total Chlorophyll Contents of Tomato in a Calcareous Sandy Loam Soil. a, A, 7, 7-76.
Rahimian, Z., 2011. Effect of Sulfur and Thiobacillus with Organic Matter on Quantitative and Qualitative Traits of Rapeseed. Plant.Phys.J. 12 (3): 19-27. [in Persian with English Summary].
Rahman, M.N., Sayem, S.M., Alam, M.K., Islam, M.S., Mondol, A.T.M.A.I., 2007. Influence of sulphur on nutrient content and uptake by rice and its balance in old Brahmaputra floodplain soil. J.Soil.Nature. 1, 5-10.
Rasouli, Z., Farahani, S.M., Besharati, H., 2015. Saffron (Crocus sativus L.) yield as affected by different fertilizing systems. Iranian Journal of Medicinal and Aromatic Plants Research
. 31(2). [in Persian with English Summary].
Ravi, S., Channal, H.T., Hebsur, N.S., Dharmatti, P.R., 2010. Effect of sulphur, zinc and iron nutrition on growth, yield, nutrient uptake and quality of safflower (Carthamus tinctorius L.). Karnataka. J. Agric. Sci. 21(3): 382-385.
Rezvani Moghadam, P., Khorramdel, S., Amin Ghafouri, A., Shabahang, J., 2013. Evaluation of growth and yield of saffron Crocus sativus L under the influence of fungal substrate compost and coriander density. Journal of Saffron Research. 1: 13-26. [in Persian with English Summary].
Temperini O., Rea R., Temperini A., Colla G., Rouphael Y., 2009. Evaluation of saffron (Crocus sativus L.) production in Italy: Effects of the age of saffron fields and plant density. J. Food, Agric. Environ. Vol. 7, Issue 1, pages 19-23.
Ünal M., Çavuşoğlu A., 2005. The effect of various nitrogen fertilizers on saffron (Crocus sativus L.) yield. Akdeniz Üniversitrsi Ziraat Fakultesi Dergisi. 18 (2), 257-260.
Zabihi, H.R. Faizi, H., 2014. Reaction of saffron to the amounts of two types of potassium fertilizer. Journal of Saffron Agriculture and Technology. 2 (3): 191-198. [in Persian with English Summary].
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