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  2. Soil pH - Wikipedia

    en.wikipedia.org/wiki/Soil_pH

    While both very low and very high pH values are detrimental to plant growth, there is an increasing trend of plant biodiversity along the range from extremely acidic (pH 3.5) to strongly alkaline (pH 9) soils, i.e. there are more calcicole than calcifuge species, at least in terrestrial environments.

  3. Soil acidification - Wikipedia

    en.wikipedia.org/wiki/Soil_acidification

    This compound causes rainfall pH to be around 5.0–5.5. When rainfall has a lower pH than natural levels, it can cause rapid acidification of soil. Sulfur dioxide and nitrogen oxides are precursors of stronger acids that can lead to acid rain production when they react with water in the atmosphere.

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

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

    Soil pH Test: For a very low price, your local Extension office will test your soil pH. To have a test completed, simply collect one cup’s worth of soil and remove all debris, such as sticks ...

  5. Alkali soil - Wikipedia

    en.wikipedia.org/wiki/Alkali_soil

    Alkali, or alkaline, soils are clay soils with high pH (greater than 8.5), a poor soil structure and a low infiltration capacity. Often they have a hard calcareous layer at 0.5 to 1 metre depth. Alkali soils owe their unfavorable physico-chemical properties mainly to the dominating presence of sodium carbonate , which causes the soil to swell ...

  6. For healthy plants, test your garden's soil for pH level - AOL

    www.aol.com/lifestyle/healthy-plants-test...

    Every plant requires a specific soil pH range within which it can best absorb essential nutrients. ... carnations require a pH range of 6.7-6.9; turfgrasses, 6.3-6.8; tomatoes, 6.2-6.8 ...

  7. 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.

  8. Iron deficiency (plant disorder) - Wikipedia

    en.wikipedia.org/wiki/Iron_deficiency_(plant...

    If soil iron concentration is high, in spite of this it can become unavailable for absorption if soil pH is higher than 6.5. [1] Excess of elements such as manganese in the soil can interfere with plant iron uptake triggering iron deficiency. [2] Iron is needed to produce chlorophyll, hence its deficiency causes chlorosis.

  9. Acid sulfate soil - Wikipedia

    en.wikipedia.org/wiki/Acid_sulfate_soil

    The ferrous form is soluble in a relatively wide range of pH conditions whereas the ferric form is not soluble except in an extremely acidic environment such as muriatic acid rust remover. The more oxidized the soil becomes, the more the ferric forms dominate. Acid sulfate soils exhibit an array of colors ranging from black, brown, blue-gray ...