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LATERITE: Refers to a soil profile with horizon/s rich in iron oxides. This is usually associated with deeply weathered profiles. warm, wet climate. KRASNOZEM: These soils are typically red, deep, well-structured, acid and porous soils. They have relatively high clay contents and tend to display a gradual increase in clay with depth
Plagioclase feldspar minerals are amongst the most common of the rock-forming minerals. A continuous series.
High-T plagioclase occurs only in some volcanic rocks, whereas the low-T albite-anorthite series are found in most igneous rocks. Plagioclase compositions are commonly expressed in terms of the 2 end-members albite (NaAlSi3O8) and anorthite (CaAl2Si2O8).
Solid solutions between K-feldspar and albite are called alkali feldspars
vadose zone (unsaturarted), capillary fringe, water table, ground water, phreatic zone (saturation), rock flowage
Humic ppt at pH = 2, fulvic no ppt at pH <=2
1N H2SO4 MW = 98 EW = 49     1N 49 g/L       = 0.5M