00589nam a2200205Ia 4500003000400000005001700004008004100021040000800062041001200070082000800082082001100090100003400101100003000135245012900165250002500294260001500319260002700334260000900361650001300370OSt20220228172525.0150909s9999    xx            000 0 und d  cCOH  aEnglish  a630  bABR/ST  aAbraham Varughese4Researcher  aMahadevan Nair K P4Guide  aStudies on the critical periods of weed infestation and effect of weed growth on yield and quality of a short duration rice.  aM.Sc                  aTrivandrum  bCollege of Agriculture  c1978  aAgronomy