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Abstract
The expansion of the agricultural border in brazilian savannahas
with the farming production in wide scale extends the environmental
costs, however it depends essentially on the adopted technique of plantation.
The study it evaluates economically, by Replacement Cost Method, the environmental
impacts of technologies of soy and corn plantation. In the case of
the soy the no tillage raises the cost of production in 0,47%, but it provokes
a reduction of (- 81,22%) in the environmental cost. In the corn, the costs
of no tillage are (- 5,92%) lesser of that conventional tillage and provoke a
reduction in the environmental cost in (- 29,43%). In the specific region of
the study the annual ambient damages caused by the conventional tillage
had been esteem in R$ 317,213.39 and the no tillage of R$ 81.375,76. The
adoption of the no tillage in the plantation of soy and corn demonstrates
its bigger social effectiveness for the reduction of the erosive process and
improvement of the outflow and the quality of the rivers.