| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Unidades Centrais. |
|
Data corrente: |
23/08/2001 |
|
Data da última atualização: |
13/09/2004 |
|
Autoria: |
VIEIRA, S. R.; CASTRO, O. M. de; TOPP, G. C. |
|
Título: |
Spatial Variability of Some Soil Physical Properties in Three Soils of Sao Paulo, Brazil. |
|
Ano de publicação: |
1992 |
|
Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasilia, v.27, n.2, p.333-341, fev.1992 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Volumetric core samples and loose soil samples were collected at 1 m interval in 10 m long transects, on three major soil groups in São Paulo, Brazil. The soil cores were used for soil desorption curves and the bulk density, and the loose soil was used for particle size analysis. The parameters obtained from the soil water retention model, bulk density and particle size values were submitted to geostatistical analysis to study the spatial variability through the examination of semivariograms and cross-semivariogram. The results showed that the scale of variation changes from soil to soil, with maximum variation for the Podzolic Soil with clay surface texture, from the northeast part of the state. For this soil also, the spatial autocorrelation was the most expressive. The variability of the soil desorption parameters was related to the particle size parameters. The geostatistical analysis results allowed establishing sample spacing for the soils studied, to allow for estimation at any finer spacing, with no bias and minimum variance. |
|
Palavras-Chave: |
soil hydraulic conductivity; soil water desorption. |
|
Thesaurus Nal: |
bulk density; particle size; soil; soil water retention. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/20622/1/pab16_fev_92.pdf
|
|
Marc: |
LEADER 01697naa a2200217 a 4500
001 1105546
005 2004-09-13
008 1992 bl uuuu u00u1 u #d
100 1 $aVIEIRA, S. R.
245 $aSpatial Variability of Some Soil Physical Properties in Three Soils of Sao Paulo, Brazil.
260 $c1992
520 $aVolumetric core samples and loose soil samples were collected at 1 m interval in 10 m long transects, on three major soil groups in São Paulo, Brazil. The soil cores were used for soil desorption curves and the bulk density, and the loose soil was used for particle size analysis. The parameters obtained from the soil water retention model, bulk density and particle size values were submitted to geostatistical analysis to study the spatial variability through the examination of semivariograms and cross-semivariogram. The results showed that the scale of variation changes from soil to soil, with maximum variation for the Podzolic Soil with clay surface texture, from the northeast part of the state. For this soil also, the spatial autocorrelation was the most expressive. The variability of the soil desorption parameters was related to the particle size parameters. The geostatistical analysis results allowed establishing sample spacing for the soils studied, to allow for estimation at any finer spacing, with no bias and minimum variance.
650 $abulk density
650 $aparticle size
650 $asoil
650 $asoil water retention
653 $asoil hydraulic conductivity
653 $asoil water desorption
700 1 $aCASTRO, O. M. de
700 1 $aTOPP, G. C.
773 $tPesquisa Agropecuaria Brasileira, Brasilia$gv.27, n.2, p.333-341, fev.1992
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 70 | |
| 7. |  | GREGO, C. R.; OLIVEIRA, R. P. de; VIEIRA, S. R. Geoestatística aplicada a Agricultura de Precisão. In: BERNARDI, A. C. de C.; NAIME, J. de M.; RESENDE, A. V. de; BASSOI, L. H.; INAMASU, R. Y. (Ed.). Agricultura de precisão: resultados de um novo olhar. Brasília, DF: Embrapa, 2014. p. 74-83| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Solos; Embrapa Territorial. |
|    |
| Registros recuperados : 70 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
