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Symbiotic relationships between legumes and the bacteria that grow in their roots are critical for plant survival. Without those bacteria, the plants would have no source of nitrogen, an element that ...
Smectites in Iron-Rich Calcareous Soil and Black Soils of Taiwan
Black Soils Iron-Rich Calcareous Soil Mollisols Smectite Vermiculite Vertisols
2011/12/7
Abstract: The iron-rich calcareous soil (Typic Rhodustalf) from the Penghu island group represents a volcanic area. The black soils (Typic Haplustert, Vertic Endoaquoll, Typic Hapludolls) are typical ...
Origin of Iron-Rich Montmorillonite from the Manganese Nodule Belt of the North Equatorial Pacific
Authigenic Formation Deep-Sea Clay Manganese Nodule Belt Montmorillonite Pacific Sediments Smectite
2012/2/9
Clay minerals in the upper 50 cm of sediment that surround the Cu- and Ni-rich manganese nodules in the North Equatorial Pacific form two fractions: terrigenous (mostly eolian) illite, chlorite, and k...
Hisingerite Occurring as a Weathering Product of Iron-Rich Saponite
Hisingerite Occurring Iron-Rich Saponite
2012/2/14
Hisingerite occurs as a weathering product of iron-rich saponite in rhyolitic tuff of Oya, Tochigi Prefecture. The chemical composition: SiO2, 40·68%; Al2O3, 4·44%; Fe2O3, 28·54%; MgO, 1·85%; CaO, 1·4...
Clayey fragments colored deep bluish-green are widely found in glassy rhyolitic tuffs at Oya, Tochigi Prefecture. In room-air the color changes to black or gray within one hour and finally to brown in...