The productive performance of livestock is very low which may be due to non-availability of quality feeds and fodder around the year. There are many methods by which quality of the fodders can be enhanced but important advances have been made in livestock nutrition especially in respect of the role of rumen microorganisms in synthesis of protein from non-protein nitrogen sources such as urea and ammonium compounds. However, the urea can be utilized more efficiently in presence of sulphur and energy sources. The authors have tried to carry out the research work to study the effect...