In this book are shown the results of the atrazine behavior in Argentinean, conducted between 2001 and 2006. In the first work it was studied the behavior of atrazine in surface soils, and evaluated the effect of land use and how it affects the ability of soil to remove residual atrazine. In the second study it was evaluated two soil profiles characteristic of the province of Cordoba, and in each horizon, the effect of soil properties on the retention and degradation of atrazine mineralization was evaluated. The third study aimed to recognize the distribution along the profile of the soil's ability to mineralize atrazine. The soil sterilization was carried out to quantify chemical and biological degradation of atrazine. In the fourth and fifth paper it was analyzed different strategies of winter weed control and how weed management influenced on the atrazine persistence. In the sixth and final paper it is presented an original proposal to identify soils with rapid mineralization capacity of atrazine, based in corn crop history where atrazine is used. As a tool to reconstruct the history of the lot was used satellite images.

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.

In this book, we show the results previously published in international scientist journals. Use of lysimeters allows for integral studies of pesticide and nutrients behavior in soil. In studies at semi- field scale it is possible to incorporate aspects related to crop such as crop development, fertilization, crop sequence, method of water supply, cultivation systems. The study was conducted during the maize crop production in plots with lysimeters in two characteristic profiles of the central region of Argentina, maintaining regional use strategies and management. By means of this comprehensive reserch the atrazine behaviour and N leaching were studied considering different factors: edaphic, climate and crop sequence and tillage system.