00521nam a22001697a 4500003000400000008004100004082001600045100003100061245012700092260003900219300001000258502001700268650001300285650003100298650001100329650001100340OSt260505b        |||||||| |||| 00| 0 eng d  a633.1bD97I  aDwivedi, Dharmendra Kumar.  aIntegrated Nutrient Management for Sustainable Production Under Rice-Wheat Cropping System / cby Dharmendra Kumar Dwivedi  a.- Pusa, Samastipurb: RAUc, 1997  a189p.  bPh. D.d1997  aAgronomy  aRice_Wheat Cropping System  aThesis  aPh. D.