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	Provedor de dados Agronomy (3) Autor van Straaten, Peter (3) Biondi, Caroline Miranda (2) Ferreira, Tiago Osório (2) Nascimento, Clístenes Williams Araújo do (2) Silva, Ygor Jacques Agra Bezerra da (2) Souza Júnior, Valdomiro Severino de (2) Bittar, Sheila Maria Bretas (1) Curi, Nilton (1) Furtini Neto, Antonio Eduardo (1) Reis, Daniele Nogueira dos (1) Mais... Palavra-chave Chemical index of alteration (2) Soil fertility (2) Soil genesis (2) Ciência do Solo (1) Ciências Agrárias/Agronomia/Ciência do Solo soil science (1) Fertilizers (1) Minerals (1) Northeastern Brazil. (1) Northeastern Brazil. Ciência do Solo (1) Powdered rock (1) Soil science (1) Soluble K (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2018 (2) 2016 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Geochemical signatures and weathering rates in soils derived from different granites in contrasting climatic locations Agronomy Silva, Ygor Jacques Agra Bezerra da; Nascimento, Clístenes Williams Araújo do; Biondi, Caroline Miranda; van Straaten, Peter; Souza Júnior, Valdomiro Severino de; Ferreira, Tiago Osório. We studied the mineralogical properties and chemical composition of different granites using energy dispersive X-ray spectroscopy coupled with scanning electron microscopy to understand the relationship between granite signatures and soil characteristics, including weathering patterns and soil fertility status. The discriminant analysis (DA) was based on soil physical and chemical properties and was used to differentiate soils developed from I- and S-type granites across contrasting climatic conditions in northeast Brazil. The DA identified the highest values of organic carbon, clay and plant nutrients as key variables to recognize soil profiles derived from I-type granites. In contrast, the greater sand contents and Al saturation distinguished soils... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil science; Soil genesis; Soil fertility; Chemical index of alteration; Northeastern Brazil.; Ciência do Solo. Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39708 Extractant efficiency in the solubilization of alternative sources of potassium Agronomy Reis, Daniele Nogueira dos; van Straaten, Peter; Furtini Neto, Antonio Eduardo; Bittar, Sheila Maria Bretas; Curi, Nilton. Knowledge of a rock’s composition allows for inferences regarding several properties, ranging from its physical characteristics to its solubility. This study aimed to evaluate the use of different extractants to solubilize the K present in rocks as a potential source of nutrients and the effects of extractant contact time and temperature on rock solubilization. Samples of two rocks and a mineral concentrated from a granitic rock were treated with ammonium dihydrogen phosphate (NH4(H2PO4)), calcium dihydrogen phosphate (Ca(H2PO4)2), sodium hydroxide (NaOH) and water (control). Sample-extractant treatments were performed using a water bath shaker at temperatures of 25 and 50°C for periods of 3, 7, 10, 20, and 30 days. The amounts of K extracted from rocks... Tipo: Info:eu-repo/semantics/article Palavras-chave: Minerals; Soluble K; Fertilizers; Powdered rock. Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/28457 Geochemical signatures and weathering rates in soils derived from different granites in contrasting climatic locations Agronomy Silva, Ygor Jacques Agra Bezerra da; Nascimento, Clístenes Williams Araújo do; Biondi, Caroline Miranda; van Straaten, Peter; Souza Júnior, Valdomiro Severino de; Ferreira, Tiago Osório. We studied the mineralogical properties and chemical composition of different granites using energy dispersive X-ray spectroscopy coupled with scanning electron microscopy to understand the relationship between granite signatures and soil characteristics, including weathering patterns and soil fertility status. The discriminant analysis (DA) was based on soil physical and chemical properties and was used to differentiate soils developed from I- and S-type granites across contrasting climatic conditions in northeast Brazil. The DA identified the highest values of organic carbon, clay and plant nutrients as key variables to recognize soil profiles derived from I-type granites. In contrast, the greater sand contents and Al saturation distinguished soils... Tipo: Info:eu-repo/semantics/article Palavras-chave: Ciências Agrárias/Agronomia/Ciência do Solo soil science; Soil genesis; Soil fertility; Chemical index of alteration; Northeastern Brazil. Ciência do Solo. Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39708 Registros recuperados: 3 Primeira ... 1 ... Última

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