Remineralization of agricultural soils using residues from the amethyst and agate extracting industry, Rio Grande do Sul, Brazil

Agriculture, Agrogeology
Conference Proceedings
Abreu, Clarissa Trois; Bortoluzzi, Edson Campanhola; Hartmann, Léo Afraneo; Silva, Juliano Tonezer da
2013
English

Brazil is the world’s fourth largest consumer of fertilizers, which
is only behind consumers such as China, India and the USA. Therefore,
it is crucial to coordinate the production and consumption of this type of
product, through appropriate policies, industrial and technological
development of mineral exploration and beneficiation of mining activity
in the country. With this in mind, it becomes essential to assess the
viability of using alternative sources of nutrients, as well as using the
waste from mining and extracting industries of precious gems, as
remineralizers. Thus, it is possible to reach improvements in soil fertility
by transforming mining waste into raw material for agriculture. The
plateau region of Rio Grande do Sul state (“Planalto Médio do Rio
Grande do Sul”), is known for amethyst and agate extraction, producing
in its mines about 30,000 tons of residual basalt per month. It is under
this scenario that the project “Remineralization of agricultural soils using
residues from the extracting industry of precious gems” has been
implemented. This project involves different universities, technological institutes, and
also the miners’ cooperatives (Passo Fundo University, Federal University
of Rio Grande do Sul, Rio Grande do Sul Technology Center for Stones,
Gems and Jewelry, and Miners’ Cooperative of the Medium Upper
Uruguai LTDA, associated to the Productive Arrangement of Gems and
Jewels). This study aims to show preliminary results of the Project with
concern to the viability of using by-products from precious stone mining
industries.

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