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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. 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. 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 ...

  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. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    Soil bulk density, when determined at standardized moisture conditions, is an estimate of soil compaction. [3] Soil porosity consists of the void part of the soil volume and is occupied by gases or water. Soil consistency is the ability of soil materials to stick together. Soil temperature and colour are self-defining.

  8. Are your tomato plants in a sorry state? Here are the causes ...

    www.aol.com/tomato-plants-sorry-state-causes...

    Lowering this pH with a sulfur fertilizer, the nutrients become unlocked. A pH close to 6.5 is recommended for vegetable gardens. A soil test can relay that information, and your local Extension ...

  9. 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.