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      Biologic cycling of silica across a grassland bioclimosequence : GRASSLAND SILICA CYCLING

      , , ,
      Global Biogeochemical Cycles
      American Geophysical Union (AGU)

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          Global silicate weathering and CO2 consumption rates deduced from the chemistry of large rivers

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            SILICON.

            Silicon is present in plants in amounts equivalent to those of such macronutrient elements as calcium, magnesium, and phosphorus, and in grasses often at higher levels than any other inorganic constituent. Yet except for certain algae, including prominently the diatoms, and the Equisetaceae (horsetails or scouring rushes), it is not considered an essential element for plants. As a result it is routinely omitted from formulations of culture solutions and considered a nonentity in much of plant physiological research. But silicon-deprived plants grown in conventional nutrient solutions to which silicon has not been added are in many ways experimental artifacts. They are often structurally weaker than silicon-replete plants, abnormal in growth, development, viability, and reproduction, more susceptible to such abiotic stresses as metal toxicities, and easier prey to disease organisms and to herbivores ranging from phytophagous insects to mammals. Many of these same conditions afflict plants in silicon-poor soils-and there are such. Taken together, the evidence is overwhelming that silicon should be included among the elements having a major bearing on plant life.
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              A simple method for the rapid determination of biogenic opal in pelagic marine sediments

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                Author and article information

                Journal
                Global Biogeochemical Cycles
                Global Biogeochem. Cycles
                American Geophysical Union (AGU)
                08866236
                September 2006
                September 2006
                : 20
                : 3
                : n/a
                Article
                10.1029/2006GB002690
                4ea6989b-5094-4e09-a401-0b3eb66608f2
                © 2006

                http://doi.wiley.com/10.1002/tdm_license_1.1

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