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  2. Labeling of fertilizer - Wikipedia

    en.wikipedia.org/wiki/Labeling_of_fertilizer

    Fertilizers are usually labeled with three numbers, as in 18-20-10, indicating the relative content of the primary macronutrients nitrogen (N), phosphorus (P), and potassium (K), respectively. More precisely, the first number ("N value") is the percentage of elemental nitrogen by weight in the fertilizer; that is, the mass fraction of nitrogen ...

  3. Phosphate rich organic manure - Wikipedia

    en.wikipedia.org/wiki/Phosphate_rich_organic_manure

    Phosphate rich organic manure is a type of fertilizer used as an alternative to diammonium phosphate and single super phosphate.. Phosphorus is required by all plants but is limited in soil, creating a problem in agriculture In many areas phosphorus must be added to soil for the extensive plant growth that is desired for crop production.

  4. Phosphorus pentoxide - Wikipedia

    en.wikipedia.org/wiki/Phosphorus_pentoxide

    Phosphorus pentoxide crystallizes in at least four forms or polymorphs.The most familiar one, a metastable form [1] (shown in the figure), comprises molecules of P 4 O 10.Weak van der Waals forces hold these molecules together in a hexagonal lattice (However, in spite of the high symmetry of the molecules, the crystal packing is not a close packing [2]).

  5. Ammonium dihydrogen phosphate - Wikipedia

    en.wikipedia.org/wiki/Ammonium_dihydrogen_phosphate

    The largest use of monoammonium phosphate by weight is in agriculture, as an ingredient of fertilizers. It supplies soil with the elements nitrogen and phosphorus in a form usable by plants. Its NPK label is 12-61-0 (12-27-0), meaning that it contains 12% by weight of elemental nitrogen and (nominally) 61% of phosphorus pentoxide P 2 O

  6. Superphosphate - Wikipedia

    en.wikipedia.org/wiki/Superphosphate

    Superphosphate is a chemical fertiliser first synthesised in the 1840s by reacting bones with sulfuric acid.The process was subsequently improved by reacting phosphate coprolites with sulfuric acid.

  7. Plant nutrients in soil - Wikipedia

    en.wikipedia.org/wiki/Plant_nutrients_in_soil

    Nutrients in the soil are taken up by the plant through its roots, and in particular its root hairs.To be taken up by a plant, a nutrient element must be located near the root surface; however, the supply of nutrients in contact with the root is rapidly depleted within a distance of ca. 2 mm. [14] There are three basic mechanisms whereby nutrient ions dissolved in the soil solution are brought ...

  8. Diammonium phosphate - Wikipedia

    en.wikipedia.org/wiki/Diammonium_phosphate

    When applied as plant fertilizer, it temporarily increases the soil pH, but over a long term the treated ground becomes more acidic than before, upon nitrification of the ammonium. It is incompatible with alkaline chemicals because its ammonium ion is more likely to convert to ammonia in a high-pH environment.

  9. Mustard cake - Wikipedia

    en.wikipedia.org/wiki/Mustard_cake

    Mustard cake is the residue obtained after extraction of oil from mustard, which is used as organic fertilizer. [1] Mustard cake powder is excellent organic fertilizer containing food ingredients and even catalysts for herbaceous plants (fruit, flower and vegetable plants). [2] Mustard cake are very useful as feed for the livestock and cattle ...