References Anonymous, 2010-2011. Agricultural Statistics. Ministry of Jihad-e-Agriculture, Tehran, Iran (in Persian). Anonymous 2012. FAO Statistics of Agricultural Crops in the World. Available at: http://www.fao.org. Arabzadeh, B., and Tavakkoli, A. R. 2006. Economic analysis of deficit irrigation management for rice in direct dry seeded farming. Journal of Agricultural Engineering Research 26(7): 99-110 (in Persian). Aslam, M., Shamshad, H. S., and Shafi Nazir, M. 2002. Biological response of direct-seeding coarse rice to seeding density and planting time. Pakistan Journal of Agricultural Sciences 39(1): 28-31. Baloch, A. W., Soomro, A. M., Javed, M. A., Ahmed, M., Bughio, H. R., Bughio, M. S., and Mastoi, N. N. 2002. Optimum plant density for high yield in rice (Oryza sativa L.). Asian Journal of Plant Sciences 1(1): 25-27. Bavi. J. 2007. Effect of number of seeds per hill on grain yield, yield components and growth indices of three rice cultivars in Khuzestan condition. MSc. Thesis, Faculty of Agriculture, University of Guilan, Rasht, Iran (in Persian). Bhuiyan, S. I., Sattar, M. A., and Khan, M. A. K. 1995. Improving water use efficiency in rice irrigation through wet seeding. Irrigation Science 16: 1-8. Chatterjee, B. N., and Maiti, S. 1985. Principles and Practices of Rice Growing. Oxford and IBH Pulishing Co. Ltd., New Delhi, India. Counce, P. A., and Wells, B. R. 1987. Rice plant population density effect on early-season nitrogen requirement. Journal of Production Agriculture 3: 390-393. Cheng, Y. G. 2000. Extension services for rice production in China. China Rice 1: 21-24. Ehsanullah, N. A., Jabran, Kh., and Habib, T. 2007. Comparison of different planting methods for optimization of plant population of fine rice (Oryza sativa L.) in Punjab (Pakestan). Pakistan Journal of Agricultural Sciences 44(4): 597-599. Esfahani, M. 1998. An Introduction to the Physiology and Ecology of Rice. University of Guilan Press, Rasht, Iran (in Persian). Esfahani, M., Mojtabaie-Zamani, M., and Amiri-Larijani, B. 2009. The Growing Rice Plant. An Anatomical Monograph. University of Guilan Press, Rasht, Iran 380pp. (in Persian). Farooq, M., Kadambot, H. M., Siddique, H., Rehman, T., Aziz, W., and Dong-Jin Lee, A. Wahid. 2011. Rice direct seeding: Experiences, challenges and opportunities. Soil & Tillage Research 111: 87-98. Housley, T. L., Kirleis, A.W., and Patterson, F. L. 1982. Dry matter accumulation in soft red winter wheat seeds. Crop Scienc Journal 22: 290-294. Jones, D. B., and Snyder, G. H. 1987. Seeding rate and row spacing effects on yield and yield components of drill-seeded rice. Journal of Agronomy and Crop Science 79: 623-639. Mohammad, I., and Ranjan, M. 2001. Response of rice to the graded levels of NPK fertilizers. Crop Research Hisar 21: 120-122. Mohammad, N. H. M., Sudarshan, T., and Abdur, R. S. 2004. Effect of number of seedling per hill and urea supergranules on growth and yield of the rice (cv. Bina Dhan 4.). Journal of Biological Science 4(2): 122-129. Nai-Kin, H., Cheng, C. M., Murat, M., and Ismail, M. Z. 1993. MADA’S experiences in direct seeding. Paper in direct seeding. Workshop on Water and Direct Seeding for Rice. 14-16 June, Muda Agricultural Development, Ampang Jajar, Alor Setar, Malaysia. Onos, A. S., and Sadikko, S. L. 1998. Effect of plant density on yield and yield attribute. Crop Scienc Journal 22: 11-15. Pandy, S., and Velasco, L. E. 2002. Economics of direct seeding in Asia: Patterns of adoption and research priorities. In: Pandey, S., Mortimer, M., Wade, L., Tuong, T. P., Lopez, K., and Hardy, B. (eds.) Direct Seeding: Research Strategies and Opportunities. International Rice Research Institute, Los Banos, Philippines. Rajabzadeh, M. 1996. The effects of plant density on yield and yield components of rice in Isfahan. MSc. Thesis, Faculty of Agriculture, Isfahan University of Technology, Isfahan, Iran 71pp. (in Persian). Reynolds, M. P., Balota, M., Delgado, M. I. B., Amain, I., and Fischer, R. A. 1994. Physiological and morphological traits associated with spring wheat yield under hot, irrigated conditions. Australian Journal of Plant Physiology 21: 717-730. Saeidzadeh, F., Taghizadeh, R., and Molazem, D. 2010. Effect of plant density on yield and yield components of rice (Oryza sativa L.) in climatic condition of the west part of Guilan province. Iranian. Journal of New Agricultural Science 6(18): 37-46 (in Persian). Siebenmorgen, T., Grigg, B., Counce, P., and Hardke, J. 2014. Production Factors Impacting Rice Milling Yield. University of Arkansas Division of Agriculture. In: Arkansas Rice, University of Arkansas Division of Agriculture. Sinclair, T. R. 1998. Historical change in harvest index and crop nitrogen accumulation. Crop Scienc Journal 38: 638-643. Sittisuang, P. 1995. Extent of problems and policies in wet-seeded rice production in Thailand. pp. 1-5. In: Moody, K. (ed.) editor. Constraints, Opportunities, and Innovations for Wet-Seeded Rice. IRRI Discussion Paper Series. International Rice Research Institute, Los Banos, Philippines. Subramaniam, M., Soundararajam, A. P. N. K., and Sivasubramanian, V. 1987. Performance of broadcast seeded TM 8089 (a rice variety in india). International Rice Research Newsletter 12 (3):8-12. Venkateswarlu, B. 1976. Source-sink interrelationships in lowland rice. Plant and Soil 44: 575-586. Vongsaroj, P. 1995. Weed control in wet-seeded rice in Thailand. pp. 270-286. In: Moody, K. (ed.) Constraints, Opportunities and Innovations for Wet-Seeded Rice. IRRI Discussion Paper Series No. 10. International Rice Research Institute, Los Banos, Philippines. Wang, Z., GU, Y. J., Chen, G., Xiong, F., and Li, Y. X. 2003. Rice quality and its affecting factors. Molecular Plant Breeding 1(2): 231-241. Wells, B. R.. and Faw, H. F., 1990. Rice plant population density effect on early-season nitrogen requirement. Journal of Production Agriculture (USA) 3: 390-393. Wiangsamut, B., Lafarge, T. A., Mendoza, C. T., and Pasuquin, E. S. 2013. Agronomic traits and yield components associated with broadcasted and transplanted high-yielding rice genotypes. ESCI Journal of Crop Production 2: 19-30. Yang, F. U. 2000. Effets of plant density on growth and yield of rice. Journal of Gillin Agricultural University 22(4): 18-22. Yoshida, S. 1981. Fundamentals of Rice Crop Science. International Rice Reserch Institute, Los Banose, Philippines. 269pp. Yoshinaga, S. 2005. Improved lodging resistance in rice (Oryza sativa L.) cultivated by submerged direct seeding using a newly developed hill seeder. Japanese Journal of Crop Science National Agricultural 39 (3): 147-152.