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  2. Soil pH - Wikipedia

    en.wikipedia.org/wiki/Soil_pH

    With the addition of an equal volume of 0.02 M to the soil suspension that was prepared for the water pH, the final soil-solution ratio is 1:2 0.01 M . A 20-g soil sample is mixed with 20 mL of reverse osmosis (RO) water (1:1 w:v) with occasional stirring.

  3. Soil acidification - Wikipedia

    en.wikipedia.org/wiki/Soil_acidification

    Soil acidification is the buildup of hydrogen cations, which reduces the soil pH. Chemically, this happens when a proton donor gets added to the soil. The donor can be an acid, such as nitric acid, sulfuric acid, or carbonic acid. It can also be a compound such as aluminium sulfate, which reacts in the soil to release protons.

  4. Acid sulfate soil - Wikipedia

    en.wikipedia.org/wiki/Acid_sulfate_soil

    PAASS: soils that were once active acid sulfate soils, but have since weathered or ‘ripened’ [23] to the point they were similar to ‘normal’ sub-aerial soil in terms of their chemical and physical properties (e.g., pH and drainage). [24] As a single soil profile may contain PASS, AASS, and PAASS at different depths, the term ‘material ...

  5. Phosphate rich organic manure - Wikipedia

    en.wikipedia.org/wiki/Phosphate_rich_organic_manure

    Phosphorus dissolution in the soil is most favorable at a pH between 5.5 and 7. [5] Ions of aluminum, iron, and manganese prevent phosphorus dissolution by keeping local pH below 5.5, and magnesium and calcium ions prevent the pH from dropping below 7, preventing the release of phosphorus from its stable molecule. [5]

  6. Paucimonas lemoignei - Wikipedia

    en.wikipedia.org/wiki/Paucimonas_lemoignei

    Straight to slightly curved rods. Motile by a single polar flagellum. Endospores not found. The only known habitat is soil, particularly the rhizosphere, but not associated with plants. Obligate aerobic. Chemoorganotrophic. Characterized by restricted metabolism. Most strains are able to fix nitrogen. Grows between pH 5.5 and 9.0.

  7. Soil - Wikipedia

    en.wikipedia.org/wiki/Soil

    The effect of pH on a soil is to remove from the soil or to make available certain ions. Soils with high acidity tend to have toxic amounts of aluminium and manganese. [116] As a result of a trade-off between toxicity and requirement most nutrients are better available to plants at moderate pH, [117] although most minerals are more soluble in ...

  8. Vigna subterranea - Wikipedia

    en.wikipedia.org/wiki/Vigna_subterranea

    Optimal soil depth is between 50 and 100 cm, [11] with a light soil texture. [11] Soil fertility should be low [11] and soil pH is best suited between 5 and 6.5 [11] and should not be lower than 4.3 [11] or higher than 7. [11] Bambara groundnut is tolerant to salinity, but high sodium chloride concentration in the soil will result in yield losses.

  9. McIlvaine buffer - Wikipedia

    en.wikipedia.org/wiki/McIlvaine_buffer

    McIlvaine buffer is a buffer solution composed of citric acid and disodium hydrogen phosphate, also known as citrate-phosphate buffer.It was introduced in 1921 by the United States agronomist Theodore Clinton McIlvaine (1875–1959) from West Virginia University, and it can be prepared in pH 2.2 to 8 by mixing two stock solutions.

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