Halloysite clay minerals are ubiquitous in soils and weathered rocks where they occur in a
variety of particle shapes and hydration states. Diversity also characterizes their chemical …

A. World Reference Base for Soil Resources—Andosols B. Soil Taxonomy—Andisols V.
Chemical Weathering VI. Mineralogical Characteristics A. Common Colloidal Constituents of …

Geophagy is the deliberate consumption of soil and clay deposits by animals, including
man. Various hypotheses have been advanced to explain geophagic behavior, the main …

Six noncalcareous pedons from the basaltic terrain of the Western Ghats in Maharashtra,
India, were identified for the present study. Of these, two red‐soil pedons (Typic Haplustalfs) …

Potassium (K) is a major element for plant growth. The K+ ions fixed in soil 2: 1 clay mineral
interlayers contribute to plant K nutrition. Such clay minerals are most often the majority in …

Field and laboratory observations based on X-ray diffraction techniques suggest that 2: 1
clay minerals behave as a K reservoir. However, 2: 1 soil clay assemblages are most often …

Halloysite clay minerals are ubiquitous in soils and weathered rocks where they occur in a
variety of particle shapes and hydration states. When both halloysite and kaolinite are …

A theoretical expression for clay soil-water characteristic curves (SWCC) is developed for
cases in which the osmotic potential is small relative to the matrix potential, for the range of …

Tropical soils exhibit large differences across landscapes in many attributes, notably clay
mineralogy (2: 1 vs. 1: 1 clays), bulk geochemistry (Ca, Al), pH, cation exchange capacity …

The effect of granite powder (< 70 µ m) as a K fertilizer was investigated in a glasshouse pot
experiment conducted with three acid, sandy topsoils from podzols of South Western …