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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
22/11/2002 |
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Data da última atualização: |
22/11/2002 |
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Autoria: |
SOARES, W. V. |
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Título: |
Cation exchange capacity relationships in the buxton, charlton and suffield soil series as influenced by organic matter and lime. |
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Ano de publicação: |
1970 |
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Fonte/Imprenta: |
Orono: University of Maine, 1970. |
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Páginas: |
85p. |
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Idioma: |
Inglês |
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Notas: |
Tese Mestrado. |
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Conteúdo: |
In the Buxton and Suffield soils with organic matter present, KC1-CEC accounted for 35.5 and 73.3% of the total CEC at the zero and at the highest lime levels, respectively. The pH-dependent CEC decreased correspondingly and the total CEC was not affected significantly by rate of liming. Highly significant correlation coefficients were obtained-for the relationship of KC1-CEC to pH (r = 0.944) and for pH-dependent CEC to pH (r = 0,953). On the average, for each unit increase in pH, KC1-CEC increased 4.375 m.e. and pH-dependent CEC decreased 3.879 m.e./100 g. of soil, in the range from pH 5.16 to pH 6.98. After organic matter removal the effects of liming on other variables were less pronunced. The coefficients of correlation for KC1-CEC to decrease 27 and 76% at the zero and at the highest lime levels, respectively. The pH-dependent CEC decreased 40% in the unlimed soil and it did not vary significantly at the highest lime level. In the Charlton soil, with organic matter present, KC1-CEC accounted for 17 and 65% of the CEC, respectivvely, at the zero and at the highest lime levels. The pH-dependent CEC decreased correspondingly and total CEC increased by 4 m.e./100 g. of soil when 40,000 pounds of lime were applied to the soil. Correlation coefficients for the relationship of KC1-CEC to pH (r = 0.926) and for pH-dependent CEC to pH(r = -0.969) were highly significant. On the average, for each unit increase in pH, KC1-CEC increased 5.840 m.e. and pH-dependent CEC decreased 3.748 m.e./100 g.of soil in the .......... MenosIn the Buxton and Suffield soils with organic matter present, KC1-CEC accounted for 35.5 and 73.3% of the total CEC at the zero and at the highest lime levels, respectively. The pH-dependent CEC decreased correspondingly and the total CEC was not affected significantly by rate of liming. Highly significant correlation coefficients were obtained-for the relationship of KC1-CEC to pH (r = 0.944) and for pH-dependent CEC to pH (r = 0,953). On the average, for each unit increase in pH, KC1-CEC increased 4.375 m.e. and pH-dependent CEC decreased 3.879 m.e./100 g. of soil, in the range from pH 5.16 to pH 6.98. After organic matter removal the effects of liming on other variables were less pronunced. The coefficients of correlation for KC1-CEC to decrease 27 and 76% at the zero and at the highest lime levels, respectively. The pH-dependent CEC decreased 40% in the unlimed soil and it did not vary significantly at the highest lime level. In the Charlton soil, with organic matter present, KC1-CEC accounted for 17 and 65% of the CEC, respectivvely, at the zero and at the highest lime levels. The pH-dependent CEC decreased correspondingly and total CEC increased by 4 m.e./100 g. of soil when 40,000 pounds of lime were applied to the soil. Correlation coefficients for the relationship of KC1-CEC to pH (r = 0.926) and for pH-dependent CEC to pH(r = -0.969) were highly significant. On the average, for each unit increase in pH, KC1-CEC increased 5.840 m.e. and pH-dependent CEC decreased 3.... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 01955nam a2200133 a 4500
001 1331547
005 2002-11-22
008 1970 bl uuuu m 00u1 u #d
100 1 $aSOARES, W. V.
245 $aCation exchange capacity relationships in the buxton, charlton and suffield soil series as influenced by organic matter and lime.
260 $aOrono: University of Maine$c1970
300 $a85p.
500 $aTese Mestrado.
520 $aIn the Buxton and Suffield soils with organic matter present, KC1-CEC accounted for 35.5 and 73.3% of the total CEC at the zero and at the highest lime levels, respectively. The pH-dependent CEC decreased correspondingly and the total CEC was not affected significantly by rate of liming. Highly significant correlation coefficients were obtained-for the relationship of KC1-CEC to pH (r = 0.944) and for pH-dependent CEC to pH (r = 0,953). On the average, for each unit increase in pH, KC1-CEC increased 4.375 m.e. and pH-dependent CEC decreased 3.879 m.e./100 g. of soil, in the range from pH 5.16 to pH 6.98. After organic matter removal the effects of liming on other variables were less pronunced. The coefficients of correlation for KC1-CEC to decrease 27 and 76% at the zero and at the highest lime levels, respectively. The pH-dependent CEC decreased 40% in the unlimed soil and it did not vary significantly at the highest lime level. In the Charlton soil, with organic matter present, KC1-CEC accounted for 17 and 65% of the CEC, respectivvely, at the zero and at the highest lime levels. The pH-dependent CEC decreased correspondingly and total CEC increased by 4 m.e./100 g. of soil when 40,000 pounds of lime were applied to the soil. Correlation coefficients for the relationship of KC1-CEC to pH (r = 0.926) and for pH-dependent CEC to pH(r = -0.969) were highly significant. On the average, for each unit increase in pH, KC1-CEC increased 5.840 m.e. and pH-dependent CEC decreased 3.748 m.e./100 g.of soil in the ..........
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Registro original: |
Embrapa Solos (CNPS) |
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Registro Completo
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
22/03/2011 |
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Data da última atualização: |
24/03/2011 |
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Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
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Autoria: |
LEDO, C. A. da S.; SILVEIRA, T. C. da; CARVALHO, P. C. L. de; MARTINS, M. L. L.; TAVARES FILHO, L. F. de Q. |
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Afiliação: |
CARLOS ALBERTO DA SILVA LEDO, CNPMF; Thamyres Cardoso da Silveira, UFRB; Paulo César Lemos de Carvalho, UFRB; Márcio Lacerda Lopes Martins, UFRB; Leônidas Francisco de Queiroz Tavares Filho, UFRB. |
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Título: |
Coleta e conservação de germoplasma de espécies silvestres de Manihot no estado da Bahia para ampliação da coleção de trabalho da Embrapa Mandioca e Fruticultura. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Cruz das Almas: Embrapa Mandioca e Fruticultura, 2010. |
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Páginas: |
5 p. |
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Série: |
(Embrapa Mandioca e Fruticultura. Comunicado Técnico, 146). |
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ISSN: |
1809-502X |
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Idioma: |
Português |
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Conteúdo: |
Espécies silvestre de Manihot são importantes reservatórios de alelos de interesse a serem transferidos para a espécies cultivadas, visando ao desenvolvimento de variedades melhoradas com maior resistência a estresses causados por fatores bióticos e abióticos e que expressem maior produtividade (NASSAR, 2006). |
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Thesagro: |
Espécie Nativa; Germoplasma; Mandioca; Melhoramento Genético Vegetal. |
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Thesaurus NAL: |
cassava; Manihot. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/31018/1/comunicado-146ID27575.pdf
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Marc: |
LEADER 01201nam a2200265 a 4500
001 1882041
005 2011-03-24
008 2010 bl uuuu u0uu1 u #d
022 $a1809-502X
100 1 $aLEDO, C. A. da S.
245 $aColeta e conservação de germoplasma de espécies silvestres de Manihot no estado da Bahia para ampliação da coleção de trabalho da Embrapa Mandioca e Fruticultura.
260 $aCruz das Almas: Embrapa Mandioca e Fruticultura$c2010
300 $a5 p.
490 $a(Embrapa Mandioca e Fruticultura. Comunicado Técnico, 146).
520 $aEspécies silvestre de Manihot são importantes reservatórios de alelos de interesse a serem transferidos para a espécies cultivadas, visando ao desenvolvimento de variedades melhoradas com maior resistência a estresses causados por fatores bióticos e abióticos e que expressem maior produtividade (NASSAR, 2006).
650 $acassava
650 $aManihot
650 $aEspécie Nativa
650 $aGermoplasma
650 $aMandioca
650 $aMelhoramento Genético Vegetal
700 1 $aSILVEIRA, T. C. da
700 1 $aCARVALHO, P. C. L. de
700 1 $aMARTINS, M. L. L.
700 1 $aTAVARES FILHO, L. F. de Q.
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