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  2. Soil pH - Wikipedia

    en.wikipedia.org/wiki/Soil_pH

    However, in high-pH soils with a high calcium carbonate content (more than 2%), attempting to reduce the pH with acids can be very costly and ineffective. In such cases, it is often more efficient to add phosphorus, iron, manganese, copper, or zinc instead because deficiencies of these nutrients are the most common reasons for poor plant growth ...

  3. Alkali soil - Wikipedia

    en.wikipedia.org/wiki/Alkali_soil

    Soil moisture with pH < 4 is called very acid and with pH > 10 very alkaline (basic). H 2 CO 3 (carbonic acid) is unstable and produces H 2 O (water) and CO 2 (carbon dioxide gas, escaping into the atmosphere). This explains the remaining alkalinity (or rather basicity) in the form of soluble sodium hydroxide and the high pH or low pOH.

  4. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    The pH range is commonly given as zero to 14, but a pH value can be less than 0 for very concentrated strong acids or greater than 14 for very concentrated strong bases. [2] The pH scale is traceable to a set of standard solutions whose pH is established by international agreement. [3]

  5. Jeremy Rhoden: Why does soil pH matter to your garden? - AOL

    www.aol.com/weather/jeremy-rhoden-why-does-soil...

    Soil pH influences your plant’s ability to uptake nutrients from the soil. If the soil pH is too high, plants are not able to absorb many micronutrients, such as manganese and iron. When soil pH ...

  6. Jeremy Rhoden: Why does soil pH matter to your garden? - AOL

    www.aol.com/entertainment/jeremy-rhoden-why-does...

    Regardless of what nutrients are available in the soil, if the pH is not correct, your plants cannot use them.

  7. Soil - Wikipedia

    en.wikipedia.org/wiki/Soil

    A study showed increased soil fertility following the addition of mature compost to a clay soil. [171] High soil tannin content can cause nitrogen to be sequestered as resistant tannin-protein complexes. [172] [173] Humus formation is a process dependent on the amount of plant material added each year and the type of base soil.

  8. Calcareous - Wikipedia

    en.wikipedia.org/wiki/Calcareous

    Calcareous soils are relatively alkaline, in other words they have a high pH. They are characterized by the presence of calcium carbonate in the parent material; the carbonate-ion is a base. Additionally, these soils may have a calcic horizon, a layer of secondary accumulation of carbonates (usually calciumcarbonate or magnesiumcarbonate) in ...

  9. 6 Myths About High Blood Pressure Experts Want You to Stop ...

    www.aol.com/lifestyle/6-myths-high-blood...

    Prolonged high blood pressure, or hypertension, can lead to severe complications such as heart disease, stroke, kidney failure and vision loss. Yet millions of Americans are living with elevated ...