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	Provedor de dados Rev. Bras. Ciênc. Solo (2) Autor Guedes,Elaine Maria Silva (2) Costa,José Ribamar (1) Faria,Letícia de Abreu (1) Fernandes,Antonio Rodrigues (1) Guedes,Rafael da Silva (1) Lima,Herdjania Veras de (1) Luz,Pedro Henrique de Cerqueira (1) Nascimento,Carlos Antonio Costa do (1) Serra,Ademar Pereira (1) Vitti,Godofredo Cesar (1) Mais... Palavra-chave Boric acid (1) Coated urea (1) Conventional tillage (1) Copper sulfate (1) No-tillage (1) S Index (1) Volatilization (1) Zeolite (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2013 (1) 2012 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Loss of ammonia from nitrogen fertilizers applied to maize and soybean straw Rev. Bras. Ciênc. Solo Faria,Letícia de Abreu; Nascimento,Carlos Antonio Costa do; Vitti,Godofredo Cesar; Luz,Pedro Henrique de Cerqueira; Guedes,Elaine Maria Silva. In Brazilian agriculture, urea is the most commonly used nitrogen (N) source, in spite of having the disadvantage of losing considerable amounts of N by ammonia-N volatilization. The objectives of this study were to evaluate: N lossby ammonia volatilization from: [urea coated with copper sulfate and boric acid], [urea coated with zeolite], [urea+ammonium sulfate], [urea coated with copper sulfate and boric acid+ammonium sulfate], [common urea] and [ammonium nitrate]; and the effect of these N source son the maize yield in terms of amount and quality. The treatments were applied to the surface of a soil under no-tillage maize, in two growing seasons. The first season (2009/2010) was after a maize crop (maize straw left on the soil surface) and the second... Tipo: Info:eu-repo/semantics/article Palavras-chave: Boric acid; Copper sulfate; Coated urea; Volatilization; Zeolite. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400014 Impacts of different management systems on the physical quality of an Amazonian Oxisol Rev. Bras. Ciênc. Solo Guedes,Elaine Maria Silva; Fernandes,Antonio Rodrigues; Lima,Herdjania Veras de; Serra,Ademar Pereira; Costa,José Ribamar; Guedes,Rafael da Silva. The physical quality of Amazonian soils is relatively unexplored, due to the unique characteristics of these soils. The index of soil physical quality is a widely accepted measure of the structural quality of soils and has been used to specify the structural quality of some tropical soils, as for example of the Cerrado ecoregion of Brazil. The research objective was to evaluate the physical quality index of an Amazonian dystrophic Oxisol under different management systems. Soils under five managements were sampled in Paragominas, State of Pará: 1) a 20-year-old second-growth forest (Forest); 2) Brachiaria sp pasture; 3) four years of no-tillage (NT4.); 4) eight years of no-tillage (NT8); and 5) two years of conventional tillage (CT2). The soil samples were... Tipo: Info:eu-repo/semantics/article Palavras-chave: Conventional tillage; No-tillage; S Index. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000400021 Registros recuperados: 2 Primeira ... 1 ... Última

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