Use of Glyphoste as environmental tracer to evaluate impact of extensive agriculture on agro-ecological soils. Study of case

Abstract

In recent years productive activities in Latin America have expanded at the expense of the
incorporation of the technological package based on GMO, direct sowing and pesticide
use, both type and amounts. This chemical demand has reached more than 1,500 million
of liters of commercial pesticide formulations for Brazil, Paraguay and Argentina, in the last
campaign. Agro-ecological ventures have developed in areas surrounded by conventional
chemical-based practices. The objective of the present work was to evaluate the impact, on
soils of an agroecological system, by the conventional model, using as a tracer molecule
the glyphosate and its environmental metabolite AMPA. The results show that, regardless
of the samples taken, there are statistical significant differences between the environmental
levels and that the agro-ecological field is reached by this compound, although it is not used.
In addition, there is a tendency to decrease in the values of the medians, as the distance to the
source increases.