Cho, J. Y. 2003. Seasonal runoff estimation of N and P in a paddy field of central Korea. Nutrient Cycling in Agro Ecosystems 65: 43-52.##Choudhury, A. T. M. A. and Kennedy, I. R. 2005. Nitrogen fertilizer losses from rice soils and control of environmental pollution problems. Communications in Soil Science and Plant Analysis 36: 1625-1639.##Choudhury, A. T. M. A. and Khanif, Y. M. 2004. Effects of nitrogen and copper fertilization on rice yield and fertilizer nitrogen efficiency: A N15 tracer study. Pakistan Journal of Scientific International Research 47: 50-55.##Craswell, E. T., De Datta, S. K., Hartantyo, M. and Obcemea, W. N. 1981. Time and mode of nitrogen fertilizer application to tropical wetland rice. Fertility Research 2 (4): 247-259.##Dobermann, A. and Fairhurst, T. 2000. Nutrient disorders and nutrient management. Handbook series. PPI. PPIC- IRRI. pp: 12-83.##Donald, C. M. and Hamblin, J. 1976. The biological yield and harvest index of cereals as agronomic and plant breeding criteria. Advance Agronomy 28: 361-405.##Dong, Y. and Wang, Z. Y. 2006. Study on release characteristics of different forms of nitrogen nutrients of slow/controlled release compound fertilizer. Scientia Agricultura Sinica 39: 960-967.##Emami, A. 1996. Plant decomposition methods. Vol. 1. Technical leaflet No. 982. Soil and Water Research Institute, Tehran, Iran. (In Persian).##Fan, L. C., Peng, X. L., Liu, Y. Y. and Song, T. X. 2005. Study on the site-specific nitrogen management of rice in cold area of northeastern China. Scientia Agricultura Sinica 38: 1761-1766.##Fillery, I. R. P. and De Datta, S. K. 1986. Ammonia volatilization from nitrogen sources applied on rice fields. II. Floodwater properties and submerged photosynthetic biomass. Soil Science Society of American Journal 50: 86-91.##Gee, G. W. and Bauder, J. W. 1986. Particle size analysis. In: Klute, A. (Ed.), Methods of soil analysis. Part 2: Physical and mineralogical methods. ASA, Madison, WI.##Irshad, A., Abbas, G. and Khaliq, A. 2000. Effect of different nitrogen application techniques on the yield and yield components of fine rice. International Journal of Agriculture and Biology 3: 239-241.##Khalil, I. M., Gutser, R. and Schmidhalter, U. 2009. Effects of urease and nitrification inhibitors added to urea on nitrous oxide emission froma loess soil. Journal of Plant Nutrition and Soil Science 172: 651-660.##Khan, A. Z., Ali, B., Afzal, M., Wahab, S., Khalil, S. K., Amin, N., Ping, Q., Qiaojing, T. and Zhou, W. 2015. Effects of sulfur and ureas coated controlled release urea on dry matter yield, N uptake and grain quality of rice.The Journal of Animal and Plant Sciences 25 (3): 679-685.##Krajewska, B. 2009. Urease I. Functional, catalytic and kinetic properties: A review. Journal of Molecular Catalysis B: Enzymatic 59: 9-21.##Liu, Y. H. and Lu, J. 2005. The comparison of several experimental methods for nitrogen mineralization of paddy soils. Chinese Journal of Soil Science 36: 675-678.##Mahboob Khomami, A., Kasraee, R., Moghaddam, M. and Kavousi, M. 2004. The effect of urea, urea with sulfur coating and their application on grain yield, yield and nitrogen recovery in rice, variety Nemat. Agricultural Science 14 (4): 107-114. (In Persian with English Abstract).##Moletti, M., Giudici, M. L., Villa, B. and Fiore, G. 1992. Quale tecnica colturale per i risi Patna: Performance di sei varieta coltivate con semina in acqua e interrata a dosi diverse di azoto.##L Informatore Agrario 11: 83-95. (In Italian with English Abstract).##Nasima, J., Khanif, M. Y., Hanfi, M. M., Wan, Z. W. Y. and Dharejo, K. A. 2010. Maize response to biodegradable polymer and urease inhibitor coated urea. International Journal of Agriculture and Biology 12 (5): 773-776.##Patnaik, S. and Rao, M. V. 1979. Sources of nitrogen for rice production. Nitrogen and Rice. International Rice Reaserch Institute, Manila, Philippines.##Pirmoradian, N., Sepaskhah, A. and Maftoun, M. 2004. Deficit irrigation and nitrogen effects on nitrogen use efficiency and grain protein of rice. Agronomie, EDP Sciences 24 (3): 143-153.##Russo, S. 1995. Rice yield as affected by the split method of N application and nitrification inhibitor DCD. In: Chataigner, J. (Ed.), Perspectives agronomiques de la culture du riz en Méditerranée: Réduire la consommation de l'eau et des engrais. Montpellier: CIHEAM. pp: 43-52.##Russo, S., Raso, G. and Ferraris, G. 1991. Effetti dell applicazione tardiva di azoto su varieta di riso (Oryza sativa L.) a differente accrescimento. I. Variazioni biomorfologiche e produttive. Rivista di Agronomia 4: 45-504.##Savant, N. K., De Datta, S. K. and Craswell, E. T. 1982. Distribution of ammonium nitrogen and N15 uptake by rice after deep placement of urea supergranules in wetland soil. Soil Science Society of American Journal 46: 567-573.##Saiful Islam, M., Hasanuzzaman, M., Rokonuzzaman, M. and Nahar, K. 2009. Effect of split application of nitrogen fertilizer on morphophysiological parameters of rice genotypes. International Journal of Plant Production 3 (1): 51-62.##Sing, U., Ladha, J. K., Castillo, E. G., Punzalan, G., Tirol-Padre, A. and Duqueza, M. 1998. Genotypic variation in nitrogen use efficiency in medium and long duration rice. Field Crops Research 58: 35-53.##Sparks, D. L. 1996. Methods of soil analysis. Part 3.Chemical methods. ASA, Madison, WI.##Tahir, M., Ather Nadeem, M., Asif Nazir, M. and Ayub, M. 2008. Growth and yield response of fine rice to split application of nitrogen. Pakistan Journal of Life and Social Sciences 6 (1): 14-17.##Westfall, D. C. 1972. Use of SCU a slow release fertilizer as a source of nitrogen for rice. In Texas agriculture experiment station. Rice Research in Texas 123: 8-11.##Zhang, J. H., Liu, J. L., Zhang, J. B., Zhao, F. T., Cheng, Y. N. and Wang, W. P. 2010. Effects of nitrogen application rates on translocation of dry matter and nitrogen utilization in rice and wheat. Acta Agronomica Sinica 36 (10): 1736-1742.
)
