Biofertilizer

Biofertilizer is a:

• Mixture of organic matter and microorganism

• Culture having the desired strain of microorganisms

• Mixture of inorganic fertilizer and microorganism

• Decomposed compost enriched with mineral solubilising bacteria

Microbes are most abundant at the:

• Rhizoplane

• Inside roots

• Rhizosphere

• Bulk soil

The following are microbes critical for N-fixation except:

• Rhizobium

• Azospirillum

• Azotobacter

• Mycorrhiza

Microbes as biofertilizers help in:

• Improved tolerance to stress

• Nutrient uptake

• Faster plant establishment

• All

The zone of soil that is most influenced by roots is called the

• mycorrhizosphere

• rhizosphere

• mycorrhiza

• porosphere

• rhizomorph

Which of the following relationships identifies a situation in which two species share a requirement for a limited resource thus reducing the fitness of one or both species? A

• Parasitism

• Competition

• Decomposition

• Mutualism

Name one nitrogen fixing biofertilizer

• Mycorrhizae

• Azospirillum

• Bacillus

• Glucanobactor

Which of the following is not mostly used as a bio-fertiliser?

• Bacteria

• Algae

• Cyanobacteria

• Fungi