Celso S. Gonçalves

TL;DR: In this article, the exposure of well and surface water to pesticides, commonly used for tobacco cropping, was assessed by using a preconcentration step with solid phase extraction (SPE), the selected pesticides were determined by gas chromatography with electron capture detection (GC-ECD) or high performance liquid chromatography for diode array detection (HPLC-DAD).

TL;DR: In this article, a trabalho com o intuito de quantificar a presenca de moleculas de agrotoxicos in aguas superficiais of tres unidades paisagisticas (UP) with different configuracoes de uso, was conducted.

TL;DR: In this article, a microbacia hidrografica (MBH) de cabeceira, situada in a distrito de Nova Boemia, em Agudo, RS.

TL;DR: In this paper, the authors quantify the soil phosphorus availability and to characterize phosphorus forms in soil sediments as contaminant agents of waters as a function of anthropic pressures, on three subwatersheds with different anthropic pressure.

TL;DR: In this paper, the influence of soil properties (physical and chemical) on aggregation and test the similarity on aggregation of original soil horizons and land leveling was evaluated and found that the aggregation of land leveling is similar to E and B horizons of the original soil.