Atta, S., Diallo, A.B., Sarr, B., Bakasso, Y., Saadou, M. and Glew, R.H. 2010. Variation in macroelements and protein contents of roselle (Hibiscus sabdariffa L.) from Niger. African Journal of Food, Agriculture, Nutrition and Development, 10(6): 2707-2718.
Bashirifar, N., Aliasgharzad, N. and Zehtab Salmasi, S., 2006. Effects of nitrogen on growth and some morphological traits of inoculated Savory (Satureja hortensis L.) with Azospirillum irakense and Pseudomonas putida. Water and soil knowledge, 26(1 & 2): 79-91.
Dadkhah, A., Kafi, M. and Rasam, G., 2009. The effect of planting date and plant density on growth traits, yield quality and quantity of Matricaria (Matricaria chamomilla). Journal of Horticultural Sciences, 23(2): 100-107.
Dorry, M.A., 2006. Effects of seed rate and planting dates on seed yield and yield components of Plantago ovata in dry farming. Iranian Journal of Medicinal and Aromatic Plants, 22(3): 262-269.
Egharevba, R.K.A. and Law-Ogbomo, K.E., 2007. Comparative effects of two nitrogen sources on the growth and the yield of Roselle (Hibiscus sabdariffa L.) in rainforest region: a case study of Benin-city, Edo state. Nigeria. Journal of Agronomy, 6: 142-146.
Garsid, A., 2004. Sowing time effects on the development, yield and oil of flaxseed in semi-arid tropical. Australian Journal of Productive in Agriculture, 23: 607-612.
Gebremedin, B.D. and Asfaw, B.T., 2017. Effects of inter and intra row spacing on growth, yield and yield components of roselle (Hibiscus Sabdariffa L.) at Wondo Genet, Southern Ethiopia. International Journal of Advanced Biological and Biomedical Research, 5(1): 27–34.
Hecl, J. and Sustrikova, A., 2006. Determination of heavy metals in chamomile flower drug an assurance of quality control. Program and Abstract book of the 1st International Symposium on Chamomile Research, Development and Production: 69.
Heidari, M. and Mobasri Moghadam, M., 2014. Effects of amount and timing of nitrogen application on yield production and quantitative characteristics of karela (Momordica charantia L.). Journal of Medicinal and Aromatic Plant Sciences, 30(3): 591-599.
Ibrahim, M.M. and Hussein, R.M., 2006. Variability, heritability and genetic advance in some genotypes of roselle (Hibiscus sabdariffa L.). World Journal of Agricultural Sciences, 2(3): 340-345.
Ismail, A., Ikram, E.H.K. and Nazri, H.S.M., 2008. Roselle (Hibiscus sabdariffa L.) seeds nutritional composition, protein quality and health benefits. Food, 2: 1-16.
Jafari, S.R.,
Nikkhah, M.,
Zare'i, G. and
Zarezadeh, A., 2015. Effect of nitrogen and phosphorus levels on fresh and dry yields of leaves and broccoli and essential oil of Perovskia abrotanoides L. Plant Ecophysiology, 7(22): 178-189.
Kashfi, S.M.H., Majnoun Hosseini, N. and Zeinali Khaneghah, H., 2011. Effect of plant density and starter nitrogen fertilizer on yield and yield components of chickpea (Cicer arietinum L. cv. Kourosh) at Karaj conditions. Iranian Journal of Pulses Research, 1(2): 11-20.
Khattak, A.M., Sajid, M., Sarwar, H.Z., Rab, A., Ahmad, M. and Khan, M.A., 2016. Effect of sowing time and plant density on the growth and production of roselle (Hibiscus sabdariffa). International Journal of Agriculture and Biology, 18(6): 1219-1224.
Khosravi, M., Moosavi, S.Gh. and Seghatoleslami, M.J., 2014. Effect of irrigation interval, Nitrogen fertilizer rate and plant density on morphological traits, yield and water use efficiency of Fenugreek (Trigonella foenum-graecum L.). Iranian Journal of Medicinal and Aromatic Plants, 30(5): 682-691.
Lack, Sh., 2013. Evaluation of physiological traits effective on seed yield of corn in different irrigation, nitrogen and plant density levels. Crop Physiology Journal, 5(19): 17-33. (In Persian).
Louis, S.J., Kadams, A.M., Simon, S.Y. and Mohammed, S.G., 2013. Combining ability in Roselle cultivars for agronomic traits in Yola, Nigeria. Greener Journal of Agricultural Sciences, 3 (2): 145-149.
Maksoud, S.A. and Hosni, H.A., 1997. Distribution of Urease in the seeds of some Egyption species of Malvaceae and Tiliaceae. Egyption Journal of Botany, 70(2): 285-297.
Mardaninejad, Sh., khaladbarin, B., Sadat, Y.A., Moradshahi, A., and Vazirpour, M., 2002. Effect of ammonium nitrate on the shoots and the essential oil of lavender medications. Abstract Proceedings of the National Conference on Medicinal Plants, Tehran, 26-24 February, 59-57. (in Persian)
Marvi, H., Rezvani Moghaddam, P., Jahan, M. and Armin, M., 2017. Effect of planting date and plant density on yield, yield components and active ingredients of Citrus colocynthis L. Journal of Plant Production, 23(4): 17-35.
Maurya, R.P., Bailey, J.A., Jeff, S.T. and Chandler, A., 2013. Impact of plant spacing and picking interval on the growth, fruit quality and yield of okra (Abelmoschus esculentus L.). American Journal of Agriculture and Forestry, 1(4): 48-54.
Moosavi, S.G.R., 2012. The effect of sowing date and plant density on yield and yield components of roselle. Journal of Medicinal Plants Research, 6(9): 1627-1632.
Mumivand, H., Babalar, M., Hadian, J. and Fakhr Tabatbaei, M., 2011. Plant growth and essential content and composition of Satureja hortensis L. cv. Saturn in response to calcium carbonate and nitrogen application rates. Journal of Medicinal Plants research, 5(10):1859-1866.
Nemati, M.,
Dehmardeh, M.,
Khumri, I. and
Nejati Yazdinejad, M., 2015. The effect of application of biological fertilizers and manure on economic performance and quality characteristics of Sour Tea (
Hibiscus sabdariffa L.)
Journal of Medicinal and Aromatic Plant Sciences, 31(4): 610-625.
Ojaqhlo, P., 2007. Effect of inoculation with bio-fertilizers (Azotobacter and phosphate fertilization) on the growth, yield and yield components of safflower. Master Thesis of Agronomy, Faculty of Agriculture, Islamic Azad University of Tabriz, Tabriz, Iran. (In Persian with English Summary).
Omidbeigi, R. and Hasani Malayeri, S., 2007. A study of the effects of nitrogen and plant density on the productivity of feverfew (Tanacetum parthenium cv. Zardband). Iranian Journal of Agricultural Sciences (Agronomy and Crop Biotechnology), 38(2): 303-309.
Oyewole, C.I. and Mera, M., 2010. Response of roselle (Hibiscus sabdariffa L.) to rates of inorganic and farmyard fertilizers in the Sudan savanna ecological zone of Nigeria. African Journal of Agricultural Research, 5(17): 2305-2309.
Parsa Motlagh, B., Rezvani Moghaddam, P., Ghorbani, R. and Azami Sardooei, Z., 2017. The effect of sowing date and plant density on yield and yield components of roselle (Hibiscus sabdariffa L.) under Jiroft climate conditions. Iranian Journal of Field Crops Research, 14(4): 735-745.
Raeisisarbijan, A.R., Broomand, N. and Zaher Ara, T., 2016. Effect of Nitrogen and Zinc Foliar Application on Quantitative Traits of Tea Rosslle (Hibiscus sabdariffa) in Jiroft Zone. Journal of Horticultural Science, 30(1): 93-101.
Rahbarian, P., Afsharmanesh, G. and Behzadi, N., 2011. Effect of drought stress and plant density on yield of Hibiscus sabdariffa in Jiroft, Iran. Agriculture new finding, 5(3): 237-245.
Rahemi, M., 2004. Pollination and fruit formation. Publication of Shiraz University. [In Persian]
Rahmani, N., Taherkhani, T., Daneshian, J., 2009. The effects of nitrogen application on physiological indices of yield of Calendula officinalis L. under drought stress conditions. Journal of new finding in Agriculture, 3(4):355-365. [In Persian]
Rezvani Moghaddam, P., 2008. New and forgotten crops. 446 p in: A.R. koocheki and M. khajeh Hosseini eds. Modern Agronomy. Publication by University Jahad of Mashhad.
Sabagh Nekonam, M. and Razmjoo, K.H., 2007. Effect of plant density on yield, yield components and effective medicine ingredients of blond psyllium (Plantago ovata Forsk.) accessions. International Journal of Agriculture and Biolog, 9(4): 606-609.
Sadeghi, H. and Criana Mohammad, J., 2001. Effect of Plant Density and Nitrogen Fertilizer on Physiological Indices of Maize (
Zea mays L.).
Iranian Journal of Crop Sciences, 3(1): 13-25.
Sanoussi, A., Hadiara, H.S., Yacoubou, B., Benoit, S., Issaka, L. and Mahamane, S., 2011. Yield character variability in Roselle (Hibiscus sabdariffa L.). African Journal of Agricultural Research, 6(6): 1371-1377.
Schippers, R.R., 2000. African Indigenous Vegetable: An Overview of the Cultivated Species. University of Greenwich, Natural Resources Institute, U.K. p: 214.
Sepahrom, A. and Moosavi, S.Gh., 2016. The effect of irrigation and nitrogen levels on morphological traits, yield and yield components of roselle (Hibiscus sabdariffa L.). Iranian Journal of Medicinal and Aromatic Plants, 32(3): 436-449.
Sepehri, A. and Vaziriamjad, Z., 2015. The effect of iron and zinc nano fertilizers on quantitative yield of chicory (Cichorium inyubus L.) in different crop densities. Knowledge of agriculture and sustainable production, 25(2.1): 61-74.
Timothy, E.L. and Futuless, K.N., 2014. Influence of sowing date and different levels of nitrogen fertilizer on the performance of roselle (Hibiscus sabdariffa L.) in Nigeria. Research and Reviews: Journal of Agriculture and Allied Sciences, 3(1): 5-8.
Zarei, Gh., Shamsi Mahmoodabadi, H., Tabatabaei, S.A. and Mohtaram, S.A., 2014. Effect of sowing date and plant density on yield of chicory (Cichorium intybus L.). Agronomy Journal (Pajouhesh and Sazandegi), 104: 136-141.
)