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  2. Labeling of fertilizer - Wikipedia

    en.wikipedia.org/wiki/Labeling_of_fertilizer

    Fertilizers with additional macronutrients (S, Ca, Mg) may add more numbers to the N-P-K ratio to indicate the amount. The additional numbers are similarly reported in the oxide mass fraction form. For example, a Polish fertilizer labeled "NPK (Ca,S) 4-12-12 (14-29)" has an equivalent of 14% soluble calcium oxide and 29% total sulfur trioxide. [6]

  3. 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 ...

  4. Fertilizer - Wikipedia

    en.wikipedia.org/wiki/Fertilizer

    Although improved crop yields resulting from NPK fertilizers are known to dilute the concentrations of other nutrients in plants, [113] [115] much of the measured decline can be attributed to the use of progressively higher-yielding crop varieties that produce foods with lower mineral concentrations than their less-productive ancestors.

  5. Plant nutrition - Wikipedia

    en.wikipedia.org/wiki/Plant_nutrition

    Plant nutrition is the study of the chemical elements and compounds necessary for plant growth and reproduction, plant metabolism and their external supply. In its absence the plant is unable to complete a normal life cycle, or that the element is part of some essential plant constituent or metabolite .

  6. Terrarium - Wikipedia

    en.wikipedia.org/wiki/Terrarium

    A temperature-controlled terrarium with plants inside. A terrarium (pl. terraria or terrariums) is a glass container containing soil and plants in an environment different from the surroundings. It is usually a sealable container that can be opened for maintenance or to access the plants inside; however, terraria can also be open to the atmosphere.

  7. Redfield ratio - Wikipedia

    en.wikipedia.org/wiki/Redfield_ratio

    It may even be the case that the Redfield Ratio is applicable to terrestrial plants, soils, and soil microbial biomass, which would inform about limiting resources in terrestrial ecosystems. [12] In a study from 2007, soil and microbial biomass were found to have a consistent C:N:P ratios of 186:13:1 and 60:7:1, respectively on average at a ...

  8. Hoagland solution - Wikipedia

    en.wikipedia.org/wiki/Hoagland_solution

    Due to relatively high concentrations in the aqueous stock solutions (cf. Tables 1 and 2) the Hoagland solution is very good for the growth of plants with lower nutrient demands as well, such as lettuce and aquatic plants, with the further dilution of the preparation to 1 ⁄ 4 or 1 ⁄ 5 of the modified solution. [14]

  9. Seaweed fertiliser - Wikipedia

    en.wikipedia.org/wiki/Seaweed_fertiliser

    Humans use seaweeds nutritionally as food, industrially for animal feed and plant fertilizer, and ecologically to improve environmental conditions. [ 7 ] [ 6 ] [ 8 ] Seaweeds have been consumed by humans for centuries because they have excellent nutritional profiles, contain minerals, trace elements , amino acids , and vitamins , [ 7 ] and are ...