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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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| Registros recuperados : 57 | |
| 5. |  | FREITAS, L. M. M. de; LOBATO, E.; SOARES, W. V. Experimentos de calagem, e adubação em solos sob vegetação de cerrado do Distrito Federal. Pesquisa Agropecuária Brasileira, Rio de Janeiro, v. 6, p. 81-89, 1971. (Agronomia, 4). Título em inglês: Lime fertilizer experiments on Cerrado vegetation in the Federal District.
A partir do v. 3(1968) é constituída de duas partes: Série Agronomia e Série Veterinária, publicadas também separadamente.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 10. | | SOARES, W. V.; LOBATO, E.; SOUSA, D. M. G. de; REIN, T. A. Avaliação do fosfato natural de Gafsa para recuperação de pastagem degradada em latossolo vermelho-escuro. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 35, n. 4, p. 819-825, abr. 2000. Título em inglês: Evaluation of a coarse-ground Gafsa rock phosphate in the recuperation of a degraded pasture on a clayey dark-red latosol| Biblioteca(s): Embrapa Unidades Centrais. |
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| 13. | | VILELA, L.; SPAIN, J. M.; SOARES, W. V.; GOMIDE, C. C. C. Adaptação de gramíneas e leguminosas forrageiras a níveis de acidez e fósforo em um solo de cerrado: primeira coleção. In: REUNION SABANAS, 1., 1992, Brasilia, DF. Red Internacional de Evaluacion de Pastos Tropicales - RIEPT. Brasilia, DF: EMBRAPA-CPAC; [Cali]: CIAT, 1992. p. 431-438.| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 57 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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