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  2. Soil pH - Wikipedia

    en.wikipedia.org/wiki/Soil_pH

    Elemental sulfur (90–99% S) has been used at application rates of 300–500 kg/ha (270–450 lb/acre) – it slowly oxidises in the soil to form sulfuric acid. Acidifying fertilizers, such as ammonium sulfate, ammonium nitrate and urea, can help to reduce the pH of soil because ammonium oxidises to form nitric acid.

  3. Ammonium sulfate - Wikipedia

    en.wikipedia.org/wiki/Ammonium_sulfate

    Calcium carbonate precipitates as a solid, leaving ammonium sulfate in the solution. (NH 4) 2 CO 3 + CaSO 4 → (NH 4) 2 SO 4 + CaCO 3. Ammonium sulfate occurs naturally as the rare mineral mascagnite in volcanic fumaroles and due to coal fires on some dumps. [14] Ammonium sulfate is a byproduct in the production of methyl methacrylate. [15]

  4. Fertilisers and Chemicals Travancore - Wikipedia

    en.wikipedia.org/wiki/Fertilisers_and_Chemicals...

    The Caprolactam plant in Udyogamandal was commissioned in 1990. Main products include ammonia, sulfuric acid, ammonium phosphate-sulfate (FACTAMFOS), ammonium sulfate, zincated ammonium phosphate, caprolactam, and also complex fertilizers. gypsum, nitric acid, soda ash and coloured ammonium sulfate are major by-products.

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  6. Soil acidification - Wikipedia

    en.wikipedia.org/wiki/Soil_acidification

    Soil acidification is a common issue in long-term crop production which can be reduced by lime, organic amendments (e.g., straw and manure) and biochar application. [ 37 ] [ 25 ] [ 38 ] [ 39 ] [ 40 ] In sugarcane, soybean and corn crops grown in acidic soils, lime application resulted in nutrient restoration, increase in soil pH, increase in ...

  7. Labeling of fertilizer - Wikipedia

    en.wikipedia.org/wiki/Labeling_of_fertilizer

    In the U.K., fertilizer labeling regulations allow for reporting the elemental mass fractions of phosphorus and potassium.The regulations stipulate that this should be done in parentheses after the standard N-P-K values, as in "15-30-15 (15-13-13)".

  8. Organic fertilizer - Wikipedia

    en.wikipedia.org/wiki/Organic_fertilizer

    Organic fertilizer nutrient content, solubility, and nutrient release rates are typically much lower than mineral (inorganic) fertilizers. [ 38 ] [ 39 ] A University of North Carolina study found that potential mineralizable nitrogen (PMN) in the soil was 182–285% higher in organic mulched systems than in the synthetics control.

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