Dispersion behavior of soils from reclaimed lands with poor soil physical properties and their characteristics with special reference to clay mineralogy

Evaluation of relationship between dispersibility of soils and charge characteristics using a modified ion adsorption method; An example of soils from Wakayama Prefecture, Japan

“…As reported previously (Itami and Kyuma 1995), the dispersion and flocculation behavior of the soil from reclaimed land in Wakayama was quite different from the adjacent forest soil although these soils were derived from the same parent material. As a result of the comparison of soils with low organic matter content, it was suggested that the form of A1 (i.e.…”

Effect of removal of free oxides on changes in dispersibility and charge characteristics of soils

“…As reported previously (Itami and Kyuma 1995), dispersion and flocculation behavior of the soil from a reclaimed area in Wakayama, Japan, was quite different from that of an adjacent forest soil although both soils were derived from the same parent material. The soil from the reclaimed area showed a high dispersibility in water, whereas the forest soil dispersed very little even after Na saturation.…”

“…2) Determination of dispersibility of soils: Dispersibility of the clay size fraction after the treatments and dialysis was determined by the method of Itami and Kyuma (1995). As an index of dispersibility of soils, the amount of dispersed clay particles after each treatment was compared with that of the blank (NaC1) treatment.…”

Relação entre atributos físicos, mineralogia da fração argila e formas de alumínio no solo

“…Jones & Uehara (1973), utilizando técnicas de microscopia eletrônica, observaram a presença de gel amorfo de Al (hidróxido de Al não-cristalino) unindo partículas de argila. Reichert & Norton (1994) e Itami & Kyuma (1995) verificaram a atuação dos óxidos de Al como agentes ligantes de partículas coloidais. Tisdall & Oades (1982), ao proporem um modelo de agregação do solo, relataram que os aluminossilicatos menos cristalinos participavam, juntamente com óxidos e substâncias húmicas, como agentes inorgânicos adsorvidos à superfície das argilas e com propriedades ligantes, principalmente no tocante a agregados menores que 2 mm.…”