147 results for group: agrogeology-2
ACTION OF MICROORGANISMS IN BASALT POWDER
Stonemeal is the application of crushed rocks in the soil. The objective of this work was to observe the action of microorganisms (inoculated and native) on the mineralization of basalt rock dust and to measure the elements released into the soil. This assessment was done by comparing decomposing particles of basalt powder applied to humic A horizon of a soil derived from granite. The basalt powder was collected at Cavinatto quarry, situated in Limeira-SP (Brazil). The experiment is being conducted in vitro, in isolated plastic containers with the following treatments: 1) soil; 2) sterilized soil; 3) soil without sterilization and with addition of ...
Remineralization of agricultural soils using residues from the amethyst and agate extracting industry, Rio Grande do Sul, Brazil
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 ...
Information for the Application of Silicate Rock Dust for the Amelioration of Forest Soils
This report contains information for “fertilization with rock dust” with an orientation towards practical application. The widely used term “gesteinsmehl” will be limited here to pulverized rocks of silicate origin.
Rocks for Crops: Agrominerals of sub-Saharan Africa.
A productive and sustainable agricultural system is fundamental to the well being of a nation and a cornerstone of its development. In most of sub-Saharan Africa, more than 50% of the population rely on agriculture for their livelihood, which generally contributes more than 30% of the Gross Domestic Product (GDP). Agriculture is the major source of income, employment, food security and survival for the majority of the population. While agricultural production is steadily increasing in sub-Saharan Africa, the population is growing faster than food production. The result is a net decline in per-capita food production, which contributes to increased food ...
Efficacy, sustainability and diffusion potential of rock dust for soil remediation in Chontales, Nicaragua
To produce enough food for a growing population, soil remediation is crucial unless more forests are to be cleared to make way for agriculture land. Finely ground rocks have been proposed as a soil amendment for highly weathered soils. In Chontales, Nicaragua most of the forest has been converted to cattle pasture. In fertile soils, crop agriculture is more lucrative per unit of area than cattle grazing, but the low nutrient content of Chontales soils makes it uneconomic. The purpose of the study was to examine whether incorporation of rock dust is a sustainable way to increase the fertility in Chontales and thus can be part of a strategy that ...
Global Soil Nutrient Depletion and Yield Reduction
Nutrient depletion in soils adversely affects soil quality and reduces crop yield and consequently poses a potential threat to global food security and agricultural sustainability. With an emphasis on human-induced nutrient depletion, this paper described the causality among soil nutrient depletion, soil quality, crop production, socio-economic variables, and environmental condition. Then, global soil nutrient budgets of nitrogen (N), phosphorus (P), and potassium (K) were estimated for wheat (Triticum aestivum L.), rice (Oryza sativa), maize (Zeamays L.), and barley (Hordeum vulgare) production for the year 2000. As a result, there were unbalanced ...
EFEITO DA APLICAÇÃO DO PÓ DE ROCHA NA RECUPERAÇÃO DE UMA PASTAGEM CULTIVADA
O presente trabalho teve como objetivo avaliar a utilização de rochas como fonte de potássio, fósforo e seus efeitos na recuperação de uma pastagem de Brachiaria decumbens. O experimento foi instalado na Embrapa Cerrados, em Planaltina -DF, em 21 de janeiro de 2011, quando foram aplicados os seguintes tratamentos:Tl- testemunha absoluta, sem aplicação de adubos solúveis e rocha;T2,T3 eT4;T6,T7 eT8;T10; T11 -testemunha sem aplicação de fertilizante potássico, com apenas 60 kg ha·1 P2O5 como ST. Todos os fertilizantes foram aplicados em superfície e incorporados com uso de grade pesada e niveladora para posterior semeadura da Brachiaria ...
ESTUDO DA CINÉTICA DE LIBERAÇÃO DE POTÁSSIO CONTIDO NO FLOGOPITITO DA BAHIA
Neste trabalho foi estudada a quantidade de liberação do potássio contido em uma amostra de flogopitito, rocha que contem o mineral flogopita, da região de Campo Formoso,Bahia. A caracterização mineralógica e química da rocha,
feita por meio de difração dos raios-X, microscopia eletrônica de varredura, espectroscopia no infravermelho e fluorescência de raios- X mostrou que o mineral flogopita contém em torno de 8% de K2O,com os ions potássio nas posições interlamelares. A extração do potássio foi estudada, utilizando-se água, ssoluções ácidas (acido nítrico, cítrico, oxálico e solução Mehlich-1) e salina (tetrafenilbor...
VIABILIDADE DO USO DE PÓ DE ROCHA COMO FONTE ALTERNATIVA DE NUTRIENTES NO ESTADO DO TOCANTINS
O presente estudo analisa a viabilidade de uso do pó de rocha obtido pela moagem dos rejeitos de mineração do
Garimpo de Monte Santo-TO,a partir dos custos de beneficiamento,do preço das fontes convencionais de K,
Ca e Mg e do valor do frete na região, levando em conta duas estratégias de uso- substituição ou complementação das fontes convencionais de nutrientes.
https://www.researchgate.net/publication/295099176_Anais_do_II_Congresso_Brasileiro_de_Rochagem_coletanea_de_varios_autores
ROCHAGEM NO SUL DOS ESTADOS DO MARANHÃO E PIAUÍ
O atual modelo produtivo agrícola de grãos praticado nos chapadões do sul dos estados do Maranhão e Piauí, segundo as análises de futuro utilizando-se ferramentas de planejaéento estrategico, manifesta-se insustentável no médio-longo prazos.Levantamentos geol6gicos elaborados nessa região apontam para a extensa ocorrência de agrominerais e corpos rochosos favoráveis à prática da rochagem, o que contribuirá para a conservação dos solos e recursos hídricos.
https://www.researchgate.net/publication/295099176_Anais_do_II_Congresso_Brasileiro_de_Rochagem_coletanea_de_varios_autores
