Mobility of Zn, Cd and Pb in soils as affected by poultry litter extract-I. Leaching in soil columns

aves de corral cadmio cadmium calcium chloride chelating agents chlorure de calcium cinc cloruro calcico edta engrais organique eua farmyard manure fumier georgia (eua) georgia (usa) heavy metals leaching lead lessivage du sol metales pesados oligoelementos organic fertilizers plomb plomo poultry quelatos soil sol suelo trace elements usa volaille zinc