Multiple choice

VAM is an alternative to inorganic fertilizer. What is VAM?

  1. Azospirillum

  2. Mycorrhiza

  3. Phosphate solubilising bacteria

  4. Nitrogen fixing bacteria

  5. Azotobacter
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

VAM (Vesicular Arbuscular Mycorrhiza) is a symbiotic fungus that forms associations with plant roots, enhancing nutrient uptake (especially phosphorus) and water absorption. It's widely used as an organic alternative to inorganic phosphatic fertilizers. The other options are all bacteria: Azospirillum and Azotobacter are nitrogen fixers, PSB are phosphate solubilizers, but VAM refers specifically to mycorrhizal fungi.

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