Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Gibbsita"'
Autor:
Aluisio A. Cabral, Jose M. Rivas-Mercury, Jose R.M. Sucupira, Miguel A. Rodríguez, Antonio H. De Aza, Pilar Pena, Elena Moukhina
Publikováno v:
Boletín de la Sociedad Española de Cerámica y Vidrio, Vol 62, Iss 3, Pp 292-301 (2023)
Synthetic gibbsite (Al(OH)3) was mechanically activated by attrition milling for 24 h, with various grinding ball-to-powder weight ratios (0, 5, 10, and 20), and characterized by thermal analysis (TG-DSC). Further, we determined the corresponding kin
Externí odkaz:
https://doaj.org/article/b40be3cf69e048769d95ac2cbf055357
Publikováno v:
Agronomía Costarricense, Vol 38, Iss 1, Pp 75-106 (2014)
Se resume la información disponible sobre caracterización de arcillas en suelos de Costa Rica desde 1931 hasta el presente, descrita en 84 trabajos con 520 observaciones hasta el 2014. La discusión se basa principalmente en la mineralo - gía de a
Externí odkaz:
https://doaj.org/article/0337ccb35935470c8fc7fb345a5f3a60
Publikováno v:
Revista Brasileira de Ciência do Solo, Vol 37, Iss 2, Pp 307-316 (2013)
Although the influence of clay mineralogy on soil physical properties has been widely studied, spatial relationships between these features in Alfisols have rarely been examined. The purpose of this work was to relate the clay minerals and physical p
Externí odkaz:
https://doaj.org/article/474129bc4110418bb5c71d544dd6329b
Publikováno v:
Revista Brasileira de Ciência do Solo, Vol 37, Iss 2, Pp 295-306 (2013)
A good knowledge of the spatial distribution of clay minerals in the landscape facilitates the understanding of the influence of relief on the content and crystallographic attributes of soil minerals such as goethite, hematite, kaolinite and gibbsite
Externí odkaz:
https://doaj.org/article/fe4c00a01c644188aad388ef98795a38
Autor:
Wellington Barbosa Silva, Marga Eliz Pontelli, Gisele Pietrobelli, Cleverson Holocheski, Rafael Adriano Castro
Publikováno v:
Ambiência, Vol 8, Iss 3, Pp 879-894 (2012)
ResumoEm baixa encosta, a margem direita do rio das Pombas em Guarapuava (Paraná), foram identificados processos de erosão em túneis (pipes). Tratam-se de processos subsuperficiais de erosão que apresentam feições típicas, tais como, subsidên
Externí odkaz:
https://doaj.org/article/46b36bcfcb9e42adae0360399d8274f7
Autor:
Jairo Calderari de Oliveira Junior, Luiz Claudio de Paula Souza, Vander de Freitas Melo, Hélio Olympio da Rocha
Publikováno v:
Revista Brasileira de Ciência do Solo, Vol 35, Iss 5, Pp 1481-1490 (2011)
As características físicas e químicas do solo são fortemente influenciadas pela sua constituição mineralógica, as quais, mesmo a curtas distâncias horizontais, podem apresentar alta variabilidade espacial, fato que pode ser descrito mais adeq
Externí odkaz:
https://doaj.org/article/1fb06574e47249c6b3099b9c20324aaf
Autor:
Cesar Crispim Vilar, Antonio Carlos Saraiva da Costa, Allan Hoepers, Ivan Granemann de Souza Junior
Publikováno v:
Revista Brasileira de Ciência do Solo, Vol 34, Iss 4, Pp 1059-1068 (2010)
O P é um dos macronutrientes primários essenciais para a produção vegetal. Apesar de ser o menos absorvido pelas plantas, é o mais utilizado nas adubações nos solos das regiões tropicais e subtropicais úmidas. Isso ocorre porque o P tem gran
Externí odkaz:
https://doaj.org/article/6ebc22c7c1e740b0b73dfabb3d931648
Publikováno v:
Agronomía Costarricense, Vol 34, Iss 2, Pp 197-222 (2010)
La composición mineralógica de la fracción arcilla en suelos cultivados con banano en las 11 cuencas hidrográficas de las llanuras aluviales del Caribe de Costa Rica, se caracterizó mediante difractometría de rayos X y métodos de disolución.
Externí odkaz:
https://doaj.org/article/957f1071c16a4d50b3f9a5c5a2e8afbb
Autor:
Diogo Mazza Barbieri, José Marques Júnior, Luis Reynaldo Ferracciú Alleoni, Fernando José Garbuio, Livia Arantes Camargo
Publikováno v:
Scientia Agricola, Vol 66, Iss 6, Pp 819-826 (2009)
Hillslope curvatures are associated with specific environments that correlate to chemical and mineralogical attributes of soil, so determining specific management zones. Phosphorus is one of the main limiting factors to the development and longevity
Externí odkaz:
https://doaj.org/article/5cabf7e5ea2f4495a0b747980b8a7550
Autor:
Pedro Rodolfo Siqueira Vendrame, Robélio Leandro Marchão, Osmar Rodrigues Brito, Maria de Fátima Guimarães, Thierry Becquer
Publikováno v:
Pesquisa Agropecuária Brasileira, Vol 44, Iss 8, Pp 996-1001 (2009)
The objective of this work was to assess the relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture. Twelve collection points were chosen in the Distrito Federal and in Formosa municipality
Externí odkaz:
https://doaj.org/article/9e60d4bc8d39438e825efa8017e3481e