1. On-farm N supply and N nutrition in the rice–wheat system of Nepal and Bangladesh;Adhikari;Field Crops Res.,1999
2. Leaf color chart for managing nitrogen fertilizer in lowland rice in Bangladesh;Alam;Agron. J.,2005
3. Balasubramanian, V., Ladha, J.K., Gupta, R.K., Naresh, R.K., Mehla, R.S., Bijay-Singh, Yadvinder-Singh, 2003. Technology options for rice in the rice–wheat system in South Asia. In: Ladha, J.K., Hill, J.E., Duxbury, J.M., Gupta, R.K., Buresh, R.J. (Eds.), Improving the Productivity and Sustainability of Rice–Wheat Systems: Issues and Impact. ASA Special Publication No. 65. Am. Soc. Agron., Crop Sci. Soc. Am., Soil Sci. Soc. Am., Madison, Wisconsin, USA, pp. 115–147.
4. Chlorophyll meter- and leaf color chart-based nitrogen management for rice and wheat in northeastern India;Bijay-Singh;Agron. J.,2002
5. BRRI, 2004. Adhunik Daner Chas (A Bangali Publication). Bangladesh Rice Research Institute, Gazipur, Bangladesh.