| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Caprinos e Ovinos; Embrapa Cerrados; Embrapa Meio-Norte; Embrapa Pantanal; Embrapa Semiárido. |
|
Data corrente: |
01/08/1992 |
|
Data da última atualização: |
05/11/2015 |
|
Autoria: |
OLIVEIRA, J. G. B. de. |
|
Título: |
Characterization of range sites. |
|
Ano de publicação: |
1979 |
|
Fonte/Imprenta: |
[S.l.]: University of Arizona, 1979. |
|
Páginas: |
105p. |
|
Idioma: |
Inglês |
|
Notas: |
Ph.D. Dissertation. |
|
Conteúdo: |
The research reported in this dissertation deals with the characterization of range sites on the Santa Rita Experimental Range located 50 kilometers south of Tucson, Arizona. Soil and vegetation data were collected on 90 macroplots stratified by two precipitation zones, three groups of soils, and three levels of historical livestock grazing use. Each combination of strata was sampled with five replications. The soils of the macroplots were described in terms of horizon thickness, textural class, gravel content, moist color, and presence of carbonate. Percentage rock cover, percentage slope, and aspect also were measured. The vegetation of the macroplots was sampled during January and February, 1978 for cover and plant species frequency. Data were analyzed by analysis of variance, linear correlation analysis, cluster analysis and polar ordination. Analyses of variance were calculated for soil characteristics and plant species frequencies. These analysis indicated that most soil characteristics showed significant F values for groups of soil, but not for levels of use of the initial design stratification. The analysis of variance showed that individual species also showed many significant F values for groups of soil, but that only four and five species, respectively, were significantly different for use and the interaction use-soil. Two of the four species which were significantly different for levels of use, Boutelous rothrockii and Trichachne californica, were not significantly different for groups os soil. These... MenosThe research reported in this dissertation deals with the characterization of range sites on the Santa Rita Experimental Range located 50 kilometers south of Tucson, Arizona. Soil and vegetation data were collected on 90 macroplots stratified by two precipitation zones, three groups of soils, and three levels of historical livestock grazing use. Each combination of strata was sampled with five replications. The soils of the macroplots were described in terms of horizon thickness, textural class, gravel content, moist color, and presence of carbonate. Percentage rock cover, percentage slope, and aspect also were measured. The vegetation of the macroplots was sampled during January and February, 1978 for cover and plant species frequency. Data were analyzed by analysis of variance, linear correlation analysis, cluster analysis and polar ordination. Analyses of variance were calculated for soil characteristics and plant species frequencies. These analysis indicated that most soil characteristics showed significant F values for groups of soil, but not for levels of use of the initial design stratification. The analysis of variance showed that individual species also showed many significant F values for groups of soil, but that only four and five species, respectively, were significantly different for use and the interaction use-soil. Two of the four species which were significantly different for levels of use, Boutelous rothrockii and Trichachne californica, were not significant... Mostrar Tudo |
|
Palavras-Chave: |
Characterization; Classificacao; Estados Unidos; Grassland; Macroplot; Management; Range; Range site; Rangeland; Tipo. |
|
Thesagro: |
Agronomia; Biodiversidade; Composição Botânica; Ecologia; Espécie; Manejo; Pastagem; Pastagem Nativa; Planta; Solo; Uso da Terra; Vegetação. |
|
Thesaurus Nal: |
area; Arizona; classification; ecology; land use; soil; vegetation. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02645nam a2200481 a 4500
001 1559977
005 2015-11-05
008 1979 bl uuuu m 00u1 u #d
100 1 $aOLIVEIRA, J. G. B. de
245 $aCharacterization of range sites.
260 $a[S.l.]: University of Arizona$c1979
300 $a105p.
500 $aPh.D. Dissertation.
520 $aThe research reported in this dissertation deals with the characterization of range sites on the Santa Rita Experimental Range located 50 kilometers south of Tucson, Arizona. Soil and vegetation data were collected on 90 macroplots stratified by two precipitation zones, three groups of soils, and three levels of historical livestock grazing use. Each combination of strata was sampled with five replications. The soils of the macroplots were described in terms of horizon thickness, textural class, gravel content, moist color, and presence of carbonate. Percentage rock cover, percentage slope, and aspect also were measured. The vegetation of the macroplots was sampled during January and February, 1978 for cover and plant species frequency. Data were analyzed by analysis of variance, linear correlation analysis, cluster analysis and polar ordination. Analyses of variance were calculated for soil characteristics and plant species frequencies. These analysis indicated that most soil characteristics showed significant F values for groups of soil, but not for levels of use of the initial design stratification. The analysis of variance showed that individual species also showed many significant F values for groups of soil, but that only four and five species, respectively, were significantly different for use and the interaction use-soil. Two of the four species which were significantly different for levels of use, Boutelous rothrockii and Trichachne californica, were not significantly different for groups os soil. These...
650 $aarea
650 $aArizona
650 $aclassification
650 $aecology
650 $aland use
650 $asoil
650 $avegetation
650 $aAgronomia
650 $aBiodiversidade
650 $aComposição Botânica
650 $aEcologia
650 $aEspécie
650 $aManejo
650 $aPastagem
650 $aPastagem Nativa
650 $aPlanta
650 $aSolo
650 $aUso da Terra
650 $aVegetação
653 $aCharacterization
653 $aClassificacao
653 $aEstados Unidos
653 $aGrassland
653 $aMacroplot
653 $aManagement
653 $aRange
653 $aRange site
653 $aRangeland
653 $aTipo
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Cerrados (CPAC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Algodão. Para informações adicionais entre em contato com cnpa.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Algodão. |
|
Data corrente: |
19/05/2009 |
|
Data da última atualização: |
19/05/2009 |
|
Tipo da produção científica: |
Resumo em Anais de Congresso |
|
Autoria: |
ALMEIDA, K. V.; SOUSA, W. J. B.; SILVA, A. C.; FIRMINO, P. de T.; BARROS, A. J. M. |
|
Afiliação: |
Ayicê Chaves Silva, Embrapa Algodão; Paulo de Tarso Firmino, Embrapa Algodão. |
|
Título: |
Estudo de biodiesel etílico de gergelim por termogravimetria e análise térmica diferencial. |
|
Ano de publicação: |
2009 |
|
Fonte/Imprenta: |
In: SIMPÓSIO NACIONAL DE BIOCOMBUSTÍVEIS, 2., 2009, Recife. Recife, 2009. |
|
Idioma: |
Português |
|
Palavras-Chave: |
Infravermelho. |
|
Thesagro: |
Gergelim. |
|
Thesaurus NAL: |
biodiesel. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 00586naa a2200193 a 4500
001 1264179
005 2009-05-19
008 2009 bl uuuu u00u1 u #d
100 1 $aALMEIDA, K. V.
245 $aEstudo de biodiesel etílico de gergelim por termogravimetria e análise térmica diferencial.
260 $c2009
650 $abiodiesel
650 $aGergelim
653 $aInfravermelho
700 1 $aSOUSA, W. J. B.
700 1 $aSILVA, A. C.
700 1 $aFIRMINO, P. de T.
700 1 $aBARROS, A. J. M.
773 $tIn: SIMPÓSIO NACIONAL DE BIOCOMBUSTÍVEIS, 2., 2009, Recife. Recife, 2009.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Algodão (CNPA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
