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  2. Hydrophobic soil - Wikipedia

    en.wikipedia.org/wiki/Hydrophobic_soil

    Separate from hydrophobic soils, increased calcium and pH are associated with increased infiltration from improved structure and [[aggregation in biologically active soils. Increasing the soil's pH increases the ability of naturally occurring humic substances to improve infiltration in hydrophobic soils. Humic acid is only water-soluble at a pH ...

  3. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    The thermal conductivity is sometimes a constant, otherwise an average value of conductivity for the soil condition between the surface and the point at depth is used. is the temperature difference (temperature gradient) between the two points in the soil between which the heat flux density is to be calculated.

  4. Critical micelle concentration - Wikipedia

    en.wikipedia.org/wiki/Critical_micelle_concentration

    removing the hydrophobic parts of the surfactant from contact with water. Subsequently, when the surface coverage by the surfactants increases, the surface free energy (surface tension) decreases and the surfactants start aggregating into micelles, thus again decreasing the system's free energy by decreasing the contact area of hydrophobic ...

  5. Partition coefficient - Wikipedia

    en.wikipedia.org/wiki/Partition_coefficient

    For cases where a drug reaches its target locations through passive mechanisms (i.e., diffusion through membranes), the ideal distribution coefficient for the drug is typically intermediate in value (neither too lipophilic, nor too hydrophilic); in cases where molecules reach their targets otherwise, no such generalization applies.

  6. Sodium chloride (data page) - Wikipedia

    en.wikipedia.org/wiki/Sodium_chloride_(data_page)

    This page provides supplementary chemical data on sodium chloride. Material safety data sheet ... Dielectric constant, 6.12 at 17–22 °C Bond strength?

  7. Soil salinity - Wikipedia

    en.wikipedia.org/wiki/Soil_salinity

    The term "sodic soil" is sometimes used imprecisely in scholarship. It's been used interchangeably with the term alkali soil, which is used in two meanings: 1) a soil with a pH greater than 8.2, 2) soil with an exchangeable sodium content above 15% of exchange capacity. The term "alkali soil" is often, but not always, used for soils that meet ...

  8. Alkali soil - Wikipedia

    en.wikipedia.org/wiki/Alkali_soil

    All the sodium in these salts enter into the river / ground water during their production process or consumption enhancing water sodicity. The total global consumption of sodium chloride is 270 million tons in the year 2010. This is nearly equal to the salt load in the mighty Amazon River. Man made sodium salts contribution is nearly 7% of ...

  9. Soil - Wikipedia

    en.wikipedia.org/wiki/Soil

    Soil, also commonly referred to as earth, is a mixture of organic matter, minerals, gases, liquids, and organisms that together support the life of plants and soil organisms. Some scientific definitions distinguish dirt from soil by restricting the former term specifically to displaced soil. Soil measuring and surveying device