Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 12
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Application of lime, phosphogypsum and fertilization rates affect soil fertility and common bean development in no-tillage system in a Cerrado Oxisol. Repositório Alice
CARVALHO, M. da C. S.; NASCENTE, A. S..
There is a lack of information about the effects of interactions among lime, phosphogypsum (PG) and fertilization on soil fertility and their effects on common bean yields in the tropics. This study aimed to determine the effects of annual application of PG and limestone and rates of fertilization on the chemical attributes of soil, fertilization efficiency , yield components and the grain yield of the common bean. The study was performed for three growing seasons in an acidic Oxisol. The experimental design was randomized blocks in a 4x4 factorial scheme. The treatments consisted of lime, lime + PG, PG, and control (without corrective application) with four fertilization rates. In an acidic and low-fertility Cerrado soil, limestone or limestone + PG...
Tipo: Artigo de periódico Palavras-chave: Fosfogesso; Feijão; Phaseolus Vulgaris; Acidez do Solo; Calagem; Fertilidade do Solo; Fertilizante; Plantio Direto; Cerrado; No-tillage; Beans; Soil fertility; Phosphogypsum; Liming; Calcium carbonate; Acid soils.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1095846
Imagem não selecionada

Imprime registro no formato completo
Controlling ammonia losses during manure composting with the addition of phosphogypsum and simple superphosphate Scientia Agricola
Prochnow,L.I.; Kiehl,J.C.; Pismel,F.S.; Corrente,J.E..
With the purpose of evaluating the effectiveness of phosphogypsum and simple superphosphate in controlling ammonia losses by volatilization during the process of manure composting, an experiment was carried out in closed flasks of 1.6 liter, in which different rates (50, 100, 150 and 200 kg.t-1) of phosphogypsum and simple superphosphate were mixed with a substrate composed of equal amounts (on weight basis) of fresh chicken manure and cattle manure. Ammonia lost by volatilization was determined after 7, 14, 21, 28 and 35 days by trapping the gas in sulfuric acid solution placed in a small glass vial which, in turn, was maintained inside the volatilization flask The remaining acid after the exposure to ammonia was determined by titration with 0.025N NaOH....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ammonia losses; Phosphogypsum; Simple superphosphate; Manure composting.
Ano: 1995 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161995000200024
Imagem não selecionada

Imprime registro no formato completo
Crop Response to Gypsum Application to Subtropical Soils Under No-Till in Brazil: a Systematic Review Rev. Bras. Ciênc. Solo
Tiecher,Tales; Pias,Osmar Henrique de Castro; Bayer,Cimélio; Martins,Amanda Posselt; Denardin,Luiz Gustavo de Oliveira; Anghinoni,Ibanor.
ABSTRACT The use of gypsum to improve the root environment in tropical soils in the southeastern and central-western regions of Brazil is a widespread practice with well-established recommendation criteria. However, only recently gypsum began to be used on subtropical soils in South of Brazil, so available knowledge of its effect on crop yield is incipient and mainly for soils under no-till (NT) systems. Avaiable studies span a wide range of responses, from a substantial increase to a slight reduction in crop yield. Also, the specific conditions leading to a favorable effect of gypsum application on crop yield are yet to be accurately identified. The primary objectives of this study were to examine previously reported results to assess the likelihood of a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phosphogypsum; Aluminum saturation; Subsurface acidity; Base saturation.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100505
Imagem não selecionada

Imprime registro no formato completo
Estimating gypsum equirement under no-till based on machine learning technique Rev. Ciênc. Agron.
Guimarães,Alaine Margarete; Caires,Eduardo Fávero; Silva,Karine Sato da; Rocha,José Carlos Ferreira da.
Chemical stratification occurs under no-till systems, including pH, considering that higher levels are formed from the soil surface towards the deeper layers. The subsoil acidity is a limiting factor of the yield. Gypsum has been suggested when subsoil acidity limits the crops root growth, i.e., when the calcium (Ca) level is low and/or the aluminum (Al) level is toxic in the subsoil layers. However, there are doubts about the more efficient methods to estimate the gypsum requirement. This study was carried out to develop numerical models to estimate the gypsum requirement in soils under no-till system by the use of Machine Learning techniques. Computational analyses of the dataset were made applying the M5'Rules algorithm, based on regression models. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rule induction; Calcium; Aluminum; Subsoil acidity; Phosphogypsum.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000200250
Imagem não selecionada

Imprime registro no formato completo
Modélisation de la dispersion du phosphogypse dans le golfe de Gabès OceanDocs
Bejaoui, B.; Raïs, S.; Koutitonsky, V..
This work concerns the modeling of the phosphogypsum dispersion emitted by the chemical industries in the gulf of Gabès. The CORMIX model based on the dimensional analysis theory is used for this study. An analysis of the sensitivity of the model parameters was initially made; eight simulations were then carried out to determine the space extent of pollution on the level of the gulf. For each condition of tide, we carried out four simulations, two concerns the high tide and two concerns the low tide. Simulations showed that pollution by phosphogypsum is spread out in space over a surface of about 60 km2.
Tipo: Journal Contribution Palavras-chave: Numerical modeling; Modélisation numérique; Gabès; Dispersion; CORMIX; Phosphogypse; Phosphogypsum; Golfe de Gabès Dispersion Chemical pollutants MED Tunisia Gabes Gulf Marine pollution Mathematical models Mathematical models http://aims.fao.org/aos/agrovoc/c_24199.
Ano: 2004 URL: http://hdl.handle.net/1834/1555
Imagem não selecionada

Imprime registro no formato completo
Soil fertility, nutrition and yield of maize and barley with gypsum application on soil surface in no-till Rev. Bras. Ciênc. Solo
Michalovicz,Leandro; Müller,Marcelo Marques Lopes; Foloni,José Salvador Simoneti; Kawakami,Jackson; Nascimento,Ronaldo do; Kramer,Luiz Fernando Machado.
Annual crop yield and nutrition have shown differentiated responses to modifications in soil chemical properties brought about by gypsum application. The aim of this study was to evaluate the effect of gypsum application rates on the chemical properties of a Latossolo Bruno (Clayey Oxisol), as well as on the nutrition and yield of a maize-barley succession under no-till. The experiment was set up in November 2009 in Guarapuava, Parana, Brazil, applying gypsum rates of 0.0, 1.5, 3.0, 4.5, and 6.0 Mg ha-1 to the soil surface upon sowing maize, with crop succession of barley. Gypsum application decreased the levels of Al3+ and Mg2+ in the 0.0-0.1 m layer and increased soil pH in the layers from 0.2-0.6 m depth. Gypsum application has increased the levels of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phosphogypsum; Calcium saturation; Sulfur; Zea mays; Hordeum vulgare.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500015
Imagem não selecionada

Imprime registro no formato completo
Structural quality of a no-tillage red latosol 50 months after gypsum aplication Rev. Bras. Ciênc. Solo
Müller,Marcelo Marques Lopes; Tormena,Cassio Antônio; Genú,Aline Marques; Kramer,Luiz Fernando Machado; Michalovicz,Leandro; Caires,Eduardo Fávero.
Gypsum application may enhance the soil quality for plants in terms of soil chemical and physical properties. The objective of this study was to evaluate the effects of gypsum application on the structural quality of a no-tillage Red Latosol. The experiment was initiated in September 2005 in Guarapuava-PR, with gypsum applications of 0; 4; 8; and 12 Mg ha-1 on the soil surface. In November 2009, two soil blocks were sampled from the 0-0.3 m layer for visual evaluation of the soil structure quality (Sq) and to determine the aggregate-tensile strength (ATS). Soil penetration resistance (PR) and gravimetric moisture (H%) of the 0-0.300 m layer were evaluated, and soil cores were collected (layers 0.000-0.075 and 0.075-0.150 m), to determine soil bulk density...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phosphogypsum; Soil physics; Visual score; Aggregation forces.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000300030
Imagem não selecionada

Imprime registro no formato completo
Surface application of gypsum in low acidic Oxisol under no-till cropping system Scientia Agricola
Caires,Eduardo Fávero; Maschietto,Evandro Henrique Gonçalves; Garbuio,Fernando José; Churka,Susana; Joris,Hélio Antonio Wood.
The conditions in which a favorable response to a gypsum application can be expected on crop yields are not clear. A 3-year field trial was carried out to evaluate the effects of gypsum application on soil chemical attributes and nutrition and yield of corn (Zea mays L.) and soybean (Glycine max L. Merrill) on a clayey Typic Hapludox of high fertility and low acidity under no-till in Guarapuava, Parana State, Brazil. Treatments were arranged in a randomized complete block design with four replications, and consisted of gypsum application on the soil surface at 4, 8, and 12 Mg ha-1. Gypsum application increased the P content in the soil most superficial layer (0.0 - 0.1 m) and also the exchangeable Ca and S-SO4(2-) contents and the Ca/Mg ratio in the soil...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Glycine max; Brazil; Phosphogypsum; Calcium; Sulfur.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200011
Imagem não selecionada

Imprime registro no formato completo
Surface application of lime and phosphogypsum to improve fertilizer use efficiency of soybean and common beans cultivated under no-tillage system in brazilian savanna. Repositório Alice
CARVALHO, M. da C. S.; RESENDE, A. V..
A field study was carried out in an acidic clayey Rhodic Ferralsol, in 2010, 2011, and 2012 growing seasons, aiming to evaluate the effect of annual surface application of lime and phosphogypsum to improve fertilizer use efficiency of soybean and common bean crops cultivated under no-till system.
Tipo: Parte de livro Palavras-chave: Feijão; Phaseolus vulgaris; Soja; Plantio direto; Solo; Calcário; Gesso; Corretivo; Liming materials; Phosphogypsum; Beans; Soybeans.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/978606
Imagem não selecionada

Imprime registro no formato completo
Use of nuclear technique in samples for agricultural purposes REA
Oliveira,Kerley A. P. de; Menezes,Maria Ângela B. C.; Jacomino,Vanusa M. F.; Sperling,Eduardo Von.
The concern related to environment is growing. Due to this, it is needed to determine chemical elements in a large range of concentration. The neutron activation technique (NAA) determines the elemental composition by the measurement of artificial radioactivity in a sample that was submitted to a neutron flux. NAA is a sensitive and accurate technique with low detection limits. An example of application of NAA was the measurement of concentrations of rare earth elements (REE) in waste samples of phosphogypsum (PG) and cerrado soil samples (clayey and sandy soils). Additionally, a soil reference material of the International Atomic Energy Agency (IAEA) was also analyzed. The REE concentration in PG samples was two times higher than those found in national...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neutron activation analysis; Multielemental analyses; Phosphogypsum; Rare earth elements.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000100006
Imagem não selecionada

Imprime registro no formato completo
Uso de gesso agrícola nos solos dos cerrados. Infoteca-e
SOUSA, D. M. G. de; LOBATO, E.; REIN, T. A..
Caracterização e extensão do problema da acidez nos solos dos cerrados; Alterações nas características químicas do solo com o uso do gesso agrícola; Respostas de culturas anuais; Respostas de culturas perenes; Recomendações do gesso.
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Correção do solo; Brasil; Fertilization; Gesso agrícola; Subsoil acidity; Uso.; Acidez do Solo; Adubação; Cerrado; Corretivo; Enxofre; Gesso; Solo.; Acidity; Cerrado soils; Gypsum; Brazil; Phosphogypsum; Soil; Savannas; Subsoil..
Ano: 1996 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/554409
Imagem não selecionada

Imprime registro no formato completo
Uso de gesso agrícola nos solos dos cerrados. Infoteca-e
SOUSA, D. M. G. de; LOBATO, E.; REIN, T. A..
bitstream/item/99080/1/cirtec-32.pdf
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Brasil; Brazilian Savanna; EMBRAPA-CPAC; Gesso agrícola; Savanas; Soil fertilization; Subsoil Acidity; Sulphur; Uso.; Adubação; Agricultura; Cerrado; Gesso; Solo.; Agriculture; Acidity; Gypsum; Phosphogypsum; Soil; Subsoil.; Savannas.
Ano: 1995 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/550796
Registros recuperados: 12
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional