00875naa a2200277 a 450000100080000000500110000800800410001910000220006024500800008226000090016252001810017165000110035265000110036365000110037465000200038565000090040565000120041465000100042665000170043665000090045365000100046265300150047265300220048770000180050977300700052717939401999-03-04       1981    bl ---       0--  u    #d1 aDWARAKNATH, P. K.  aTrace minerals and productivity of cattle in semi-arid tracts of Rajasthan.  c1981  aBlood copper levels, serum zinc levels and the effect of cobalt feeding on milk production are presented. Sub clinical to frank deficiency status exist in the semi-arid tracts.  acattle  acobalt  acopper  amilk production  azinc  aCobalto  aCobre  aDeficiência  aGado  aZinco  aDeficiency  aProducao de leite1 aGHOSAL, A. K.  tIndian Journal of Animal Healthgv.20, n.2, p.127-129, Dec. 1981.