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  2. Fertilizer - Wikipedia

    en.wikipedia.org/wiki/Fertilizer

    NPK fertilizers are three-component fertilizers providing nitrogen, phosphorus, and potassium. There exist two types of NPK fertilizers: compound and blends. Compound NPK fertilizers contain chemically bound ingredients, while blended NPK fertilizers are physical mixtures of single nutrient components.

  3. Organic fertilizer - Wikipedia

    en.wikipedia.org/wiki/Organic_fertilizer

    Organic fertilizers are fertilizers that are naturally produced. [1] Fertilizers are materials that can be added to soil or plants, in order to provide nutrients and sustain growth. Typical organic fertilizers include all animal waste including meat processing waste, manure , slurry , and guano ; plus plant based fertilizers such as compost ...

  4. 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 ...

  5. Soil fertility - Wikipedia

    en.wikipedia.org/wiki/Soil_fertility

    Nitrogen and potassium are also needed in substantial amounts. For this reason these three elements are always identified on a commercial fertilizer analysis. For example, a 10-10-15 fertilizer has 10 percent nitrogen, 10 percent available phosphorus (P 2 O 5) and 15 percent water-soluble potassium (K 2 O). Sulfur is the fourth element that may ...

  6. Controlled-release fertiliser - Wikipedia

    en.wikipedia.org/wiki/Controlled-release_fertiliser

    IBDU is a single compound with the formula (CH 3) 2 CHCH(NHC(O)NH 2) 2 whereas the urea-formaldehydes consist of mixtures of the approximate formula (HOCH 2 NHC(O)NH) n CH 2. Controlled release fertilizers are traditional fertilizers encapsulated in a shell that degrades at a specified rate. Sulfur is a typical encapsulation material.

  7. Nutrient management - Wikipedia

    en.wikipedia.org/wiki/Nutrient_management

    Nitrogen fertilizer being applied to growing corn in a contoured, no-tilled field in Iowa.. Nutrient management is the science and practice directed to link soil, crop, weather, and hydrologic factors with cultural, irrigation, and soil and water conservation practices to achieve optimal nutrient use efficiency, crop yields, crop quality, and economic returns, while reducing off-site transport ...

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