2008
DOI: 10.1590/s0100-06832008000200010
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Variáveis de acidez em função da mineralogia da fração argila do solo

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Cited by 17 publications
(12 citation statements)
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“…However, other environmental factors may have contributed to the elemental composition values of mate that were recorded, such as soil fertility, water availability and natural enemies. Specifically with regard to soil fertility, it is worth noting that although it has high acidity, the soil of the field has adequate Ca 2+ and Mg 2+ availability (Table 1), which can commonly be related to the presence of 2:1 of the minerals in kaolinitic soils (Silva et al, 2008). Thus, the high Ca 2+ and Mg 2+ may affect the absorption of other cations by changing the ionome values.…”
Section: Resultsmentioning
confidence: 99%
“…However, other environmental factors may have contributed to the elemental composition values of mate that were recorded, such as soil fertility, water availability and natural enemies. Specifically with regard to soil fertility, it is worth noting that although it has high acidity, the soil of the field has adequate Ca 2+ and Mg 2+ availability (Table 1), which can commonly be related to the presence of 2:1 of the minerals in kaolinitic soils (Silva et al, 2008). Thus, the high Ca 2+ and Mg 2+ may affect the absorption of other cations by changing the ionome values.…”
Section: Resultsmentioning
confidence: 99%
“…Significant increases in this parameter with depth for Group I reflected reduction of the positive effect of organic matter in forming negative charges near the surface, and the more oxidic mineralogy of Ferralsols favors positive charge formation in subsurface layers (Silva et al, 2008;Serafim, Lima, Lima, Zeviani, & Pessoni, 2012) Regardless of group, saturation by Al KCl (m) increased as a function of soil depth (Figure 3). However, the highest m values occurred through different routes, particularly for more contrasting groups (I and III).…”
Section: Resultsmentioning
confidence: 99%
“…Despite the strong interaction between Al and organic matter, a KCl solution can extract the most labile fraction (Campos, Silva, Silva, & Vidal-Torrado, 2014;Cunha et al, 2014). However, some authors found Al-hydroxy islands between layers of secondary 2:1 minerals in Ferralsol clay fractions of several Brazilian regions, although these minerals are only residual in welldeveloped soils (Silva, Motta, Melo, & Lima, 2008;Schaefer, Fabris, & Ker, 2008).…”
Section: Resultsmentioning
confidence: 99%
“…Coeficiente de assimetria dos atributos dentro de cada compartimento Quadro 5. Coeficiente de curtose dos atributos dentro de cada compartimento tendem a apresentar menor CTC e maior possibilidade de estabilização do Al na estrutura de óxidos secundários (gibbsita) (Silva et al, 2008;Motta & Melo, 2009). No compartimento inferior, com solos mais desenvolvidos, apesar dos altos valores de amplitude e dos coeficientes de variação (Quadros 2 e 3), os teores máximos de Al 3+ foram inferiores aos observados nos demais compartimentos (Quadro 1), o que confirma a relação negativa entre grau de intemperismo e acidez potencial trocável do solo (Bohn et al, 1979;Motta & Melo, 2009).…”
Section: Figura 4 Gráfico De Normalidade (A) E Distribuição Das Clasunclassified