In this book we tried to gather all available information about atrazine behaviour in Argentinean soils. Abundant and varied information about atrazine fate in Argentinean soils was generated in these years. The purpose of this book was to prepare a data base with the more relevant indexes determined. Indexes of adsorption (Kd), dissipation rate (k), half-life time (t1/2) were tabulated. Other items as locations where studies were carried out, and the summary the most relevant resultshas been included.