Aditya Kumar, Surendra Singh and Sumer Pal Singh
Asian Journal of Agricultural Research 6 ( 1 ): 21 - 29 , 2012
Prem Kishor, A.K. Ghosh, Surendra Singh and B.R. Maurya
Asian Journal of Agricultural Research 4 ( 4 ): 220 - 225 , 2010
R. P. Tripathi, Peeyush Sharma and Surendra Singh
International Journal of Soil Science 1 ( 2 ): 91 - 107 , 2006