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2. Controlled-release fertiliser - Wikipedia

   en.wikipedia.org/wiki/Controlled-release_fertiliser

   Slow- or controlled-release fertilizer: A fertilizer containing a plant nutrient in a form which delays its availability for plant uptake and use after application, or which extends its availability to the plant significantly longer than a reference ‘rapidly available nutrient fertilizer’ such as ammonium nitrate or urea, ammonium phosphate ...

3. Coated urea - Wikipedia

   en.wikipedia.org/wiki/Coated_urea

   The particles of fertilizer may in turn be sealed with wax to slow release further still, making microbial degradation necessary to permit water penetration. The size of fertilizer particles may also be varied in order to vary the time at which nitrogen release occurs. Sulfur-coated products typically range from 32% to 41% elemental nitrogen by ...

4. Glycoluril - Wikipedia

   en.wikipedia.org/wiki/Glycoluril

   The use of glycoluril as a sustained-release nitrogen fertilizer has been discussed, [4] but it has not been widely used because of its high cost. Glycoluril can be converted with excess methanal into tetramethylol glycoluril , which releases methanal with delay and is therefore used as a biocide in water-based paints, in liquid detergents and ...

5. Fertilizer - Wikipedia

   en.wikipedia.org/wiki/Fertilizer

   Nitrogen fertilizers are made from ammonia (NH 3) produced by the Haber–Bosch process. [28] In this energy-intensive process, natural gas (CH 4) usually supplies the hydrogen, and the nitrogen (N 2) is derived from the air. This ammonia is used as a feedstock for all other nitrogen fertilizers, such as anhydrous ammonium nitrate (NH 4 NO 3 ...

6. CULTAN Fertilization - Wikipedia

   en.wikipedia.org/wiki/CULTAN_Fertilization

   CULTAN Fertilization, or Controlled Uptake Long Term Ammonium Nutrition, is a type of injection fertilization where the entire amount of nitrogen needed for a plant to grow is injected at one time. During CULTAN fertilization, nitrogen is applied at the first signs of nitrogen deficiency in plants. [ 1 ]

7. Feather meal - Wikipedia

   en.wikipedia.org/wiki/Feather_meal

   It is then dried, cooled and ground into a powder for use as a nitrogen source for animal feed (mostly ruminants) or as an organic soil amendment. Containing up to 12% nitrogen, it is a source of slow-release, organic, high-nitrogen fertilizer for organic gardens. It is not water-soluble and does not make a good liquid fertilizer. It can be ...