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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
11/12/1998 |
Data da última atualização: |
13/07/2011 |
Autoria: |
SPEHAR, C. R.; SOUZA, P. I. M.; URBEN FILHO, G. |
Título: |
Soybean crop expansion into the tropics of Brazil. |
Ano de publicação: |
1983 |
Fonte/Imprenta: |
[s.l.: s.n., 1983]. |
Páginas: |
13 p. |
Idioma: |
Inglês |
Conteúdo: |
The response of cultivated soybeans (Glycine max (L) Merrill) to changes in daylenght (photoperiod) has limited its expansion to regions located near the Equator, where there is a short range between the shortest and the longest day. When soybean cultivars are introduced in regions of lower latitudes than those of their adaptation, there will be a reduction in their biological cycle followed by reduction in plant height - a decisive factor in the fully-mechanized crop. The research work on soybean breeding in Brazil has made possible to obtain new cultivars highly adapted to low latitudes. Variety trials conducted in many locations have shown the potencial for the soybean crop in the Cerrados, mostly situated in low latitudes. In this paper we discuss the results of soybean trials conducted by Centro de Pesquisa Agropecuaria dos Cerrados-CPAC (Cerrados National Research Center) at Rondonopolis (16o30' South latitude) and Diamantino (14o30' South latitude) in Mato Grosso State and at Planaltina (15o57' south latitude) in the Federal District. The adaptability of the new soybean genotypes created for low latitudes is evidenced by good agronomic characteristics and high yield ability, wich is comparable or superior to that obtained in the traditional soybean cropping area. |
Palavras-Chave: |
Brasil; Cultivation; Cultivo. |
Thesagro: |
Cerrado; Glycine Max; Soja. |
Thesaurus Nal: |
Brazil; soybeans. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01842nam a2200241 a 4500 001 1544227 005 2011-07-13 008 1983 bl uuuu u00u1 u #d 100 1 $aSPEHAR, C. R. 245 $aSoybean crop expansion into the tropics of Brazil. 260 $a[s.l.: s.n.$c1983 300 $a13 p. 520 $aThe response of cultivated soybeans (Glycine max (L) Merrill) to changes in daylenght (photoperiod) has limited its expansion to regions located near the Equator, where there is a short range between the shortest and the longest day. When soybean cultivars are introduced in regions of lower latitudes than those of their adaptation, there will be a reduction in their biological cycle followed by reduction in plant height - a decisive factor in the fully-mechanized crop. The research work on soybean breeding in Brazil has made possible to obtain new cultivars highly adapted to low latitudes. Variety trials conducted in many locations have shown the potencial for the soybean crop in the Cerrados, mostly situated in low latitudes. In this paper we discuss the results of soybean trials conducted by Centro de Pesquisa Agropecuaria dos Cerrados-CPAC (Cerrados National Research Center) at Rondonopolis (16o30' South latitude) and Diamantino (14o30' South latitude) in Mato Grosso State and at Planaltina (15o57' south latitude) in the Federal District. The adaptability of the new soybean genotypes created for low latitudes is evidenced by good agronomic characteristics and high yield ability, wich is comparable or superior to that obtained in the traditional soybean cropping area. 650 $aBrazil 650 $asoybeans 650 $aCerrado 650 $aGlycine Max 650 $aSoja 653 $aBrasil 653 $aCultivation 653 $aCultivo 700 1 $aSOUZA, P. I. M. 700 1 $aURBEN FILHO, G.
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Embrapa Cerrados (CPAC) |
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Registro Completo
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
24/04/2015 |
Data da última atualização: |
24/04/2015 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
FONTES, M. P. F.; XAVIER, B. T. L.; KER, J. C.; LIMA, H. N.; SOUZA, K. W. |
Título: |
Mineralogy of some soils from the Amazonia Sedimentary Basin. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
In: CONGRESO LATINOAMERICANO DE LA CIENCIA DEL SUELO, 20.; CONGRESO PERUANO DE LA CIENCIA DEL SUELO, 16., 2014, Cusco. Educar para preservar el suelo y conservar la vida en la tierra. Cusco: Centro de Convenciones de la Municipalidad del Cusco, 2014. 1 Pendrive. |
Idioma: |
Inglês |
Conteúdo: |
ABSTRACT: The Amazonia Forest is an important biome that possesses great diversity of fauna and flora, which can play a significant role in several science areas, specially, the gene reserve for the future of humankind. Nevertheless, it is a very poorly understood environment, particularly the basis of this ecosystem, its soils. This study was conducted to gain insight in the mineralogy of important soils classes of the Amazonia sedimentary basin. The soils in the upland position in the landscape are developed from tertiary sediments belonging to the Alter do Chão series and those in the floodplain position are derived from quaternary, more specifically, Holocene´s sediments. Sand, silt and clay fractions were separated and X-ray diffraction analysis was conducted. Very simple mineralogy composed basically of quartz in the coarser fractions and kaolinite, goethite and anatase for the finer fraction was found for the Oxisol, the Ultisol and the Entisol from an upland toposequence but differences in kaolinite crystallography could be noticed among them. Gibbsite was virtually absent, in spite of the advanced degree of development of most of these soils. More distinctive mineralogy was revealed for the soils developed in the more recent sediments with quartz and feldspars in the sand and silt fractions and a suite of 2:1 minerals also appearing in their clay fraction, besides kaolinite and goethite. In one upland soil petroplinthite is the main feature and its mineralogy reflected its environment of formation which is usually associated with level to gently sloping areas with fluctuating water table. MenosABSTRACT: The Amazonia Forest is an important biome that possesses great diversity of fauna and flora, which can play a significant role in several science areas, specially, the gene reserve for the future of humankind. Nevertheless, it is a very poorly understood environment, particularly the basis of this ecosystem, its soils. This study was conducted to gain insight in the mineralogy of important soils classes of the Amazonia sedimentary basin. The soils in the upland position in the landscape are developed from tertiary sediments belonging to the Alter do Chão series and those in the floodplain position are derived from quaternary, more specifically, Holocene´s sediments. Sand, silt and clay fractions were separated and X-ray diffraction analysis was conducted. Very simple mineralogy composed basically of quartz in the coarser fractions and kaolinite, goethite and anatase for the finer fraction was found for the Oxisol, the Ultisol and the Entisol from an upland toposequence but differences in kaolinite crystallography could be noticed among them. Gibbsite was virtually absent, in spite of the advanced degree of development of most of these soils. More distinctive mineralogy was revealed for the soils developed in the more recent sediments with quartz and feldspars in the sand and silt fractions and a suite of 2:1 minerals also appearing in their clay fraction, besides kaolinite and goethite. In one upland soil petroplinthite is the main feature and its mineralogy reflec... Mostrar Tudo |
Palavras-Chave: |
Terra firme. |
Thesagro: |
Bacia sedimentar; Solo; Solo aluvial; Solo argiloso. |
Thesaurus NAL: |
Alluvial soils; Amazonia; Brazil; Clay minerals; Sedimentary soils; Soil; Upland soils. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/122811/1/Congresso-Latinoamericano-Peruano-Ciencia-do-Solo-4.pdf
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Marc: |
LEADER 02612nam a2200301 a 4500 001 2014215 005 2015-04-24 008 2014 bl uuuu u00u1 u #d 100 1 $aFONTES, M. P. F. 245 $aMineralogy of some soils from the Amazonia Sedimentary Basin. 260 $aIn: CONGRESO LATINOAMERICANO DE LA CIENCIA DEL SUELO, 20.; CONGRESO PERUANO DE LA CIENCIA DEL SUELO, 16., 2014, Cusco. Educar para preservar el suelo y conservar la vida en la tierra. Cusco: Centro de Convenciones de la Municipalidad del Cusco, 2014. 1 Pendrive.$c2014 520 $aABSTRACT: The Amazonia Forest is an important biome that possesses great diversity of fauna and flora, which can play a significant role in several science areas, specially, the gene reserve for the future of humankind. Nevertheless, it is a very poorly understood environment, particularly the basis of this ecosystem, its soils. This study was conducted to gain insight in the mineralogy of important soils classes of the Amazonia sedimentary basin. The soils in the upland position in the landscape are developed from tertiary sediments belonging to the Alter do Chão series and those in the floodplain position are derived from quaternary, more specifically, Holocene´s sediments. Sand, silt and clay fractions were separated and X-ray diffraction analysis was conducted. Very simple mineralogy composed basically of quartz in the coarser fractions and kaolinite, goethite and anatase for the finer fraction was found for the Oxisol, the Ultisol and the Entisol from an upland toposequence but differences in kaolinite crystallography could be noticed among them. Gibbsite was virtually absent, in spite of the advanced degree of development of most of these soils. More distinctive mineralogy was revealed for the soils developed in the more recent sediments with quartz and feldspars in the sand and silt fractions and a suite of 2:1 minerals also appearing in their clay fraction, besides kaolinite and goethite. In one upland soil petroplinthite is the main feature and its mineralogy reflected its environment of formation which is usually associated with level to gently sloping areas with fluctuating water table. 650 $aAlluvial soils 650 $aAmazonia 650 $aBrazil 650 $aClay minerals 650 $aSedimentary soils 650 $aSoil 650 $aUpland soils 650 $aBacia sedimentar 650 $aSolo 650 $aSolo aluvial 650 $aSolo argiloso 653 $aTerra firme 700 1 $aXAVIER, B. T. L. 700 1 $aKER, J. C. 700 1 $aLIMA, H. N. 700 1 $aSOUZA, K. W.
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