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Noun: azotobacter biofertilizer
  1. A bio fertilizer containing Azotobacter genus of bacteria.
Noun: bio-fertilizer
  1. A substance which contains living microorganisms which, when applied to seed, plant surfaces, or soil, colonizes the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant.
    "Bio-fertilizers add nutrients through the natural processes of nitrogen fixation, solubilizing phosphorus, and stimulating plant growth through the synthesis of growth-promoting substances.";
    - bio fertilizer

Type of: fertiliser [Brit], fertilizer, plant food