00486nam a22001697a 4500003000400000008004100004082001700045100002600062245011800088260003900206300001000245502001700255650001300272650000900285650001100294650001100305OSt260514b        |||||||| |||| 00| 0 eng d  a633.18bR95R  aRoy, Dhirendra Kumar.  aResponse of Promising Mid-Duration Rice (Oryza sativa L.) Varieties to Nitrogen Levels / cby Dhirendra Kumar Roy  a.- Pusa, Samastipurb: RAUc, 1989  a104p.  bM. Sc.d1989  aAgronomy  aRice  aThesis  aM. Sc.